Fix various typos (including documenation)

Found via `codespell -q 3 -S *.ts,./qucs/ChangeLog -L ba,coul,inout,leaded,nd,numer,ro`

README.md

@@ -19,8 +19,8 @@ Qucs-S accepts donation using Boosty platform: https://boosty.to/qucs_s
 
 ## Build instructions
 
-Use CMake to build Qucs-S. Install all necessary dependecies: GCC, Qt, and SPICE
+Use CMake to build Qucs-S. Install all necessary dependencies: GCC, Qt, and SPICE
-(optional). For Ubuntu launch the following command to install developement tools:
+(optional). For Ubuntu launch the following command to install development tools:
 
 ~~~
 sudo apt-get install build-essential git cmake qtbase5-dev qttools5-dev qtscript5-dev libqt5svg5-dev

README_qucs

@@ -82,5 +82,5 @@ version might not even compile.
     $ git clone http://git.code.sf.net/p/qucs/git qucs-git
 
 Press 'Enter' when asked for a password.  Run `sh bootstrap.sh' and
-`configure' with the appropriate options.  Maintainance currently
+`configure' with the appropriate options.  Maintenance currently
 requires Autoconf version 2.57 and GNU automake 1.7.0.

RELEASE

@@ -30,7 +30,7 @@ Distribution process:
   - Make sure INSTALL, THANKS and README files are up to date.
 
 * Test build and packaging.
-  - Maintainance currently requires the following software packages:
+  - Maintenance currently requires the following software packages:
      + Autoconf version 2.57 (at least)
      + GNU automake 1.7.0 (at least)
      + Qt installation >= version 4.6 (by Digia)

examples/Amp_Two_Tone.sch

@@ -87,5 +87,5 @@
   </Tab>
 </Diagrams>
 <Paintings>
-  <Text 230 410 12 #000000 0 "This simulation displays two-tone distortion characteristics.  Note that computation time is lengthy to obtain accurate results.  The\nlonger the time duration and the shorter the time interval, the more accurate results.  The time duration should be approximately\n100 / lowest frequency of interest and the interval should be an integer devisor of 1 / highest frequency of interest.  (This usually\nresults in more than 1000 intervals.)  Unless the DUT  (device under test) is meant to operate in a non-linear region, the two signal\nsources should be adjusted so that the power levels are within the approximate linear region of the amplifier.\n\nThis amplifier includes an active bias circuit since the collector voltage must operate very near the supply voltage, in this case less.\nthan 0.2 volts below the supply voltage of 3.0 volts  This type of circuit often exhibits low-frequency oscillations, modulating the carrier.\nThese can be prevented by modeling closed-loop stability of the complete circuit (phase margin at unity gain must be > 135 degrees).\n\nThe DUT output intercept can be determined by noting the ratio of the sidebands to the carrier and performing a simple calculation.\nExamining the above spectrum, the carriers are at +13.4 dBm and the sideband level is -11.5 dBm.  The ratio is then sideband level\nminus  carrier level or:  (-11.5) - (+13.4) = -24.9 dB.\n\nThe ouput intercept point is calculated by:  IP3out = sideband/carrier ratio + (2 times output level) or:  (-24.9) + 2(+13.4) = +1.9 dBm.  The\ninput intercept point is simply output intercept minus gain or:  IP3in = IP3out - gain in dB.  ">
+  <Text 230 410 12 #000000 0 "This simulation displays two-tone distortion characteristics.  Note that computation time is lengthy to obtain accurate results.  The\nlonger the time duration and the shorter the time interval, the more accurate results.  The time duration should be approximately\n100 / lowest frequency of interest and the interval should be an integer devisor of 1 / highest frequency of interest.  (This usually\nresults in more than 1000 intervals.)  Unless the DUT  (device under test) is meant to operate in a non-linear region, the two signal\nsources should be adjusted so that the power levels are within the approximate linear region of the amplifier.\n\nThis amplifier includes an active bias circuit since the collector voltage must operate very near the supply voltage, in this case less.\nthan 0.2 volts below the supply voltage of 3.0 volts  This type of circuit often exhibits low-frequency oscillations, modulating the carrier.\nThese can be prevented by modeling closed-loop stability of the complete circuit (phase margin at unity gain must be > 135 degrees).\n\nThe DUT output intercept can be determined by noting the ratio of the sidebands to the carrier and performing a simple calculation.\nExamining the above spectrum, the carriers are at +13.4 dBm and the sideband level is -11.5 dBm.  The ratio is then sideband level\nminus  carrier level or:  (-11.5) - (+13.4) = -24.9 dB.\n\nThe output intercept point is calculated by:  IP3out = sideband/carrier ratio + (2 times output level) or:  (-24.9) + 2(+13.4) = +1.9 dBm.  The\ninput intercept point is simply output intercept minus gain or:  IP3in = IP3out - gain in dB.  ">
 </Paintings>

examples/bbv.sch

@@ -90,5 +90,5 @@
 <Diagrams>
 </Diagrams>
 <Paintings>
-  <Text 300 470 14 #000000 0 "circuit of broadband amplifer NE5205 (Valvo Signetics)\nbut without parasitics">
+  <Text 300 470 14 #000000 0 "circuit of broadband amplifier NE5205 (Valvo Signetics)\nbut without parasitics">
 </Paintings>

examples/external_interface/m-interface/asynchronous_boost_converter_example.m

@@ -8,7 +8,7 @@ tstart = 0;
 n = 100;
 tend = 5e-4;
 
-%% fixed-step synchonous solver test
+%% fixed-step synchronous solver test
 
 clear qtr_async1
 

examples/external_interface/m-interface/synchronous_boost_converter_example.m

@@ -6,7 +6,7 @@ tstart = 0;
 n = 2000;
 tend = 5e-4;
 
-%% fixed-step synchonous solver test
+%% fixed-step synchronous solver test
 
 clear qtr_sync1
 

examples/ngspice/BJT-noise.sch

@@ -66,5 +66,5 @@
   </Rect>
 </Diagrams>
 <Paintings>
-  <Text 50 -40 12 #000000 0 "Here is a noise analysis exmple. This is BJT \none-stage amplifier. Simulate this circuit and plot\nonoise _ total and inoise _ total variables to obtain\ndependencies of total noise vs. collector resistance.\nNOTE: This Example could be run only with Ngspice">
+  <Text 50 -40 12 #000000 0 "Here is a noise analysis example. This is BJT \none-stage amplifier. Simulate this circuit and plot\nonoise _ total and inoise _ total variables to obtain\ndependencies of total noise vs. collector resistance.\nNOTE: This Example could be run only with Ngspice">
 </Paintings>

examples/ngspice/BJT.sch

@@ -68,5 +68,5 @@
   </Rect>
 </Diagrams>
 <Paintings>
-  <Text 110 580 12 #000000 0 "This example shows the following \nfeatures of Ngspice support:\n1. Semiconductor devices usage\n2. AC and TRAN analysis\n3. Current probes usage\n4. Parametrization usage. Rload is parameter.\n5. Postprocessing usage in frequency domain.\n Volatge gain K calculation.\n6. Postrprocessing usage in time domain.\n\nNOTE: You can run this example with Qucsator and\n Ngspice  and compare results.">
+  <Text 110 580 12 #000000 0 "This example shows the following \nfeatures of Ngspice support:\n1. Semiconductor devices usage\n2. AC and TRAN analysis\n3. Current probes usage\n4. Parametrization usage. Rload is parameter.\n5. Postprocessing usage in frequency domain.\n Voltage gain K calculation.\n6. Postrprocessing usage in time domain.\n\nNOTE: You can run this example with Qucsator and\n Ngspice and compare results.">
 </Paintings>

examples/ngspice/RFLumpComp/RFLumpedComponents.lib

@@ -15,7 +15,7 @@ l1; Lead parasitic inductance (H); 1.5n
 ls; Resistance serial inductance;  5n
 l2;  Lead parasitic inductance (H); 1.5n
 Cp;  Resistor serial parasitic capacitance; 0.35p
-Cpad; Resistor parallel parastic; 5p
+Cpad; Resistor parallel parasitic; 5p
 
 Test examples: (1) Test_RATF_EquivalentCircuitD.sch
 

examples/ngspice/spice4qucs-help/Chapter13/ngspiceCustom1.sch

@@ -40,7 +40,7 @@
   <Sub S21_Probe1 1 420 960 -60 -66 0 0 "S21_Probe.sch" 0 "50" 1>
   <R_SPICE R5 1 330 1020 28 13 1 1 "50" 1 "" 0 "" 0 "" 0 "" 0>
   <GND * 1 330 1050 0 0 1 2>
-  <.CUSTOMSIM CUSTOM1 1 -70 430 0 77 0 0 "\n* AC small signal simulation.\n* \nac dec 121 1 1e6\n*\nlet Z0 = 50.0\n*\n* Find two port S parameters from test circuit.\n*\nlet S11 = V(nS11)\nlet S12 = V(nS12)\nlet S21 = V(nS21)\nlet S22 = V(nS22)\n*\n* Extract Y paramerters.\n*\nlet StoYDelS =  ( (1+S11)*(1+S22)-S12*S21 )*Z0\nlet Y11 = ( (1+S22)*(1-S11)+S12*S21 )/StoYDelS\nlet Y12 =  -2*S12/StoYDelS\nlet Y21 =  -2*S21/StoYDelS\nlet Y22 = ( (1+S11)*(1-S22)+S12*S21 )/StoYDelS\n*\n* Extract Z parameters\n*\nlet StoZDelS = ( (1-S11)*(1-S22)-S12*S21 )/Z0\nlet Z11 = ( (1+S11)*(1-S22)+S12*S21 )/StoZDelS\nlet Z12 =   2*S12/StoZDelS\nlet Z21 =   2*S21/StoZDelS\nlet Z22 = ( (1-S11)*(1+S22)+S12*S21 )/StoZDelS\n" 1 "S11; S12; S21; S22; Y11; Y12; Y21; Y22; Z11; Z12; Z21; Z22" 0 "" 0>
+  <.CUSTOMSIM CUSTOM1 1 -70 430 0 77 0 0 "\n* AC small signal simulation.\n* \nac dec 121 1 1e6\n*\nlet Z0 = 50.0\n*\n* Find two port S parameters from test circuit.\n*\nlet S11 = V(nS11)\nlet S12 = V(nS12)\nlet S21 = V(nS21)\nlet S22 = V(nS22)\n*\n* Extract Y parameters.\n*\nlet StoYDelS =  ( (1+S11)*(1+S22)-S12*S21 )*Z0\nlet Y11 = ( (1+S22)*(1-S11)+S12*S21 )/StoYDelS\nlet Y12 =  -2*S12/StoYDelS\nlet Y21 =  -2*S21/StoYDelS\nlet Y22 = ( (1+S11)*(1-S22)+S12*S21 )/StoYDelS\n*\n* Extract Z parameters\n*\nlet StoZDelS = ( (1-S11)*(1-S22)-S12*S21 )/Z0\nlet Z11 = ( (1+S11)*(1-S22)+S12*S21 )/StoZDelS\nlet Z12 =   2*S12/StoZDelS\nlet Z21 =   2*S21/StoZDelS\nlet Z22 = ( (1-S11)*(1+S22)+S12*S21 )/StoZDelS\n" 1 "S11; S12; S21; S22; Y11; Y12; Y21; Y22; Z11; Z12; Z21; Z22" 0 "" 0>
 </Components>
 <Wires>
   <870 980 880 980 "" 0 0 0 "">

examples/notch.sch

@@ -58,6 +58,6 @@
 <Diagrams>
 </Diagrams>
 <Paintings>
-  <Text 320 350 12 #000000 0 "50Hz notch filter:\nbuilt by use of extremly high Q gyrator,\nOpAmps fake a 10.1Henry+0.5mOhm coil\nthat forms resonance circuit with C2">
+  <Text 320 350 12 #000000 0 "50Hz notch filter:\nbuilt by use of extremely high Q gyrator,\nOpAmps fake a 10.1Henry+0.5mOhm coil\nthat forms resonance circuit with C2">
   <Text 320 420 12 #000000 0 "OpAmp gyrator fakes:\ninductance = C1*R1*R2*R4/R3\nresistance = 0.5*R2*R4/R3/OpAmpGain">
 </Paintings>

qucs-activefilter/helpdialog.cpp

@@ -40,7 +40,7 @@ HelpDialog::HelpDialog(QWidget *parent)
            " and User defined transfer function are supported."
 	       "To create a filter, simply enter all "
 	       "parameters and press the big button at the "
-	       "bottom of the main window. Immediatly, the "
+	       "bottom of the main window. Immediately, the "
 	       "schematic of the filter is calculated and "
 	       "put into the clipboard. Now go to Qucs, "
 	       "open an empty schematic and press "

qucs-activefilter/qf_poly.cpp

@@ -1052,7 +1052,7 @@ qf_double_t qf_poly::evalX2 (qf_double_t c) {
 void qf_poly::disp (const char *name) {
 
   if (rep == NONE) {
-    std::cout << name << "(x) is not initalized.\n";
+    std::cout << name << "(x) is not initialized.\n";
     return;
   }
 

qucs-attenuator/qucsattenuator.cpp

@@ -203,7 +203,7 @@ void QucsAttenuator::slotHelpIntro()
     tr("QucsAttenuator is an attenuator synthesis program. "
          "To create a attenuator, simply enter all "
          "the input parameters and press the calculation button. "
-         "Immediatly, the "
+         "Immediately, the "
          "schematic of the attenuator is calculated and "
          "put into the clipboard. Now go to Qucs, "
          "open an schematic and press "

qucs-filter/filter.cpp

@@ -244,7 +244,7 @@ double Filter::ChebyshevValue(int No, int Order, double Ripple)
 
   a = sin(0.5 / double(Order) * pi);
   gk = a / Ripple;
-  for(i=1; i<=No; i++) {  // coefficients are defined recursivly
+  for(i=1; i<=No; i++) {  // coefficients are defined recursively
     ak  = a;
     a   = sin(double(2 * i + 1) / double(2 * Order) * pi);
     b   = sin(double(i) * pi / double(Order));

qucs-filter/helpdialog.cpp

@@ -38,7 +38,7 @@ HelpDialog::HelpDialog(QWidget *parent)
   QString s(tr("QucsFilter is a filter synthesis program. "
 	       "To create a filter, simply enter all "
 	       "parameters and press the big button at the "
-	       "bottom of the main window. Immediatly, the "
+	       "bottom of the main window. Immediately, the "
 	       "schematic of the filter is calculated and "
 	       "put into the clipboard. Now go to Qucs, "
 	       "open an empty schematic and press "

qucs-filter/qf_filter.cpp

@@ -348,7 +348,7 @@ std::string qf_filter::to_qucs (void) {
 	  res << "10";
 	res << " 0 0";
 
-	// value of commponent
+	// value of component
 	res << " \"" << num2str(Comp[b].val).c_str();
 	switch (Comp[b].comp) {
 	case CAP: res << "F"; break;

qucs-lib/library/AnalogueCM/RFind.ifs

@@ -122,7 +122,7 @@ Null_Allowed:        no
 
 PARAMETER_TABLE:
 Parameter_Name:     tnom           
-Description:        "Inductance parameter measurement temperature n Celcius." 
+Description:        "Inductance parameter measurement temperature n Celsius." 
 Data_Type:          real            
 Default_Value:      26.58          
 Vector:              no             

qucs-lib/library/MESFETs/curtice1.ifs

@@ -91,7 +91,7 @@ Null_Allowed:       no
 
 PARAMETER_TABLE:
 Parameter_Name:     rf  
-Description:        "Forwad bias slope resistance."    
+Description:        "Forward bias slope resistance."    
 Data_Type:          real  
 Default_Value:      10.0
 Limits:             -   

qucs-lib/library/OpAmps.lib

@@ -412,7 +412,7 @@ Sub:X1 _net0 _net1 _net2 _net3 _net4 gnd Type="ua741_ps_cir"
 <Component opa27(TI)>
   <Description>
 OPA27 macromodel (Modified Boyle model generated by PSPICE parts).
-Manufactuer: Texas Instruments. 
+Manufacturer: Texas Instruments. 
   </Description>
   <Model>
 .Def:OpAmps_opa27_TI_ _net0 _net1 _net2 _net3 _net4

qucs-lib/library/Transformers.lib

@@ -5,8 +5,8 @@
 Author: Mike Brinson <mbrin72043@yahoo.co.uk>; 24 Nov. 2015
 
 A two winding transformer with fringing inductance and resistive losses.
-Lmo is the primary winding inductance with the secondary winding OPEN circut.
+Lmo is the primary winding inductance with the secondary winding OPEN circuit.
-Lmf  is the primary winding inductance with the secondary winding SHORT circut.
+Lmf  is the primary winding inductance with the secondary winding SHORT circuit.
 Rp is the primary winding DC resistance.
 Rs is the secondary winding DC resistance.
 Np = number of turns in primary winding.

qucs-lib/library/Transistors.lib

@@ -3456,7 +3456,7 @@ Added by Frans Schreuder <fransschreuder@users.sourceforge.net>
   <Description>
     power NPN BJT TO-204
     250Vce 16A 250W audio and
-    linear appications
+    linear applications
   </Description>
   <Model>
   <_BJT T_MJ15024_ 1 1530 540 8 -26 0 0 "npn" 0 "1e-09" 0 "1.41415" 0 "1.5" 0 "3.58072" 0 "5.80356" 0 "29.8965" 0 "281.892" 0 "1e-16" 0 "4" 0 "1e-16" 0 "2.99908" 0 "80.9237" 0 "1.00135" 0 "0.1" 0 "0.1" 0 "0.0571126" 0 "0.00042229" 0 "9.25367" 0 "6.19402e-9" 0 "0.4" 0 "0.457365" 0 "05e-10" 0 "0.95" 0 "0.344125" 0 "0.1" 0 "0" 0 "0.75" 0 "0.5" 0 "0.8" 0 "1e-08" 0 "1000" 0 "1.07131" 0 "0.743213" 0 "1e-07" 0 "26.85" 0 "0.0" 0 "1.0" 0 "1.0" 0 "0.0" 0 "1.0" 0 "1.0" 0 "0.0" 0>
@@ -3467,7 +3467,7 @@ Added by Frans Schreuder <fransschreuder@users.sourceforge.net>
   <Description>
     power PNP BJT TO-204
     250Vce 16A 250W audio and
-    linear appications
+    linear applications
   </Description>
   <Model>
 <_BJT T_MJ15024_ 1 1530 920 8 -26 1 0 "pnp" 0 "1e-09" 0 "1.32219" 0 "1.5" 0 "2.86343 " 0 "4.83687 " 0 "27.5881" 0 "275.881 " 0 "4.07413e-09 " 0 "3.50785" 0 "4.07413e-09" 0 "2.99735 " 0 "80.6168" 0 "0.777511" 0 "0.1" 0 "0.1" 0 "0.0620212 " 0 "0.000422878 " 0 "8.67339 " 0 "7.12267e-09 " 0 "0.4" 0 "0.461473" 0 "5e-10 " 0 "0.95" 0 "0.23" 0 "0.1" 0 "0" 0 "0.75" 0 "0.5" 0 "0.8" 0 "1e-08" 0 "1000" 0 "1.06865 " 0 "0.653882" 0 "1e-07 " 0 "26.85" 0 "0.0" 0 "1.0" 0 "1.0" 0 "0.0" 0 "1.0" 0 "1.0" 0 "0.0" 0>

qucs-lib/library/Xyce_Digital_TTL_Technology.lib

@@ -12,7 +12,7 @@
 *  Basic TTL 5V positive supply.
 *
 *  A copy of this model must be placed on 
-*  (a) a Xyce top level circuit schematic whith linear and standard TTL digital components only, 
+*  (a) a Xyce top level circuit schematic with linear and standard TTL digital components only, 
 *  or on 
 *  (b) a Xyce user defined subckt which contains linear and standard TTL digital components only.
 * 

qucs-lib/qucslib.cpp

@@ -585,7 +585,7 @@ void QucsLib::slotShowComponent(QListWidgetItem *Item)
     // change currently selected category, so the user will
     //   learn where the component comes from
     Library->setCurrentIndex(i);
-    // remove 1 to find the actual index (when in Search Mode ther is one more
+    // remove 1 to find the actual index (when in Search Mode there is one more
     //   item due to the added "Search Results" item)
     libCurIdx = i-1; // remember the category to select when exiting search
     //!! comment out the above two lines if you would like that the search

qucs-lib/symbolwidget.cpp

@@ -356,7 +356,7 @@ int SymbolWidget::createStandardSymbol(const QString& Lib_, const QString& Comp_
  * \param SymbolString
  * \param Lib_
  * \param Comp_
- * \return the number of painting elements or a negative nuber if error
+ * \return the number of painting elements or a negative number if error
  */
 int SymbolWidget::setSymbol( QString& SymbolString,
                             const QString& Lib_, const QString& Comp_)

qucs/components/CMakeLists.txt

@@ -1,4 +1,4 @@
-# qucs/componenets library
+# qucs/components library
 
 INCLUDE_DIRECTORIES( ${CMAKE_SOURCE_DIR}
                      ${CMAKE_CURRENT_SOURCE_DIR} )

qucs/components/EKV26MOS.cpp

@@ -117,7 +117,7 @@ EKV26MOS::EKV26MOS()
   Props.append (new Property ("Af", "1.0", false,
     QObject::tr ("flicker noise exponent")));
   Props.append (new Property ("Avto", "0.0", false,
-    QObject::tr ("area related theshold voltage mismatch parameter")
+    QObject::tr ("area related threshold voltage mismatch parameter")
     +" ("+QObject::tr ("V*m")+")"));
   Props.append (new Property ("Akp", "0.0", false,
     QObject::tr ("area related gain mismatch parameter")

qucs/components/MESFET.cpp

@@ -130,7 +130,7 @@ MESFET::MESFET()
     QObject::tr ("source resistance temperature coefficient")
     +" ("+QObject::tr ("1/Celsius")+")"));
   Props.append (new Property ("Ibv", "1e-3", false,
-    QObject::tr ("gate reverse breakdown currrent")
+    QObject::tr ("gate reverse breakdown current")
     +" ("+QObject::tr ("A")+")"));
   Props.append (new Property ("Rf", "10", false,
     QObject::tr ("forward bias slope resistance")

qucs/components/bjt.cpp

@@ -54,7 +54,7 @@ QString BJT::spice_netlist(bool)
 
     QStringList spice_incompat,spice_tr;
     spice_incompat<<"Type"<<"Area"<<"Temp"<<"Ffe"<<"Kb"<<"Ab"<<"Fb"; // spice-incompatible parameters
-    spice_tr.clear(); // parameters that need convertion of names
+    spice_tr.clear(); // parameters that need conversion of names
 
     QString par_str = form_spice_param_list(spice_incompat,spice_tr);
 

qucs/components/component.cpp

@@ -770,14 +770,14 @@ QString Component::getSpiceModel()
 
 QString Component::getNgspiceBeforeSim(QString sim, int lvl)
 {
-    Q_UNUSED(sim); // To supress warning
+    Q_UNUSED(sim); // To suppress warning
     Q_UNUSED(lvl);
     return QString("");
 }
 
 QString Component::getNgspiceAfterSim(QString sim, int lvl)
 {
-    Q_UNUSED(sim); // To supress warning
+    Q_UNUSED(sim); // To suppress warning
     Q_UNUSED(lvl);
     return QString("");
 }
@@ -939,7 +939,7 @@ bool Component::load(const QString& _s)
     n  = s.section(' ',8,8);    // rotated
     tmp = n.toInt(&ok);
     if(!ok) return false;
-    if(rotated > tmp)  // neccessary because of historical flaw in ...
+    if(rotated > tmp)  // necessary because of historical flaw in ...
       tmp += 4;        // ... components like "volt_dc"
     for(int z=rotated; z<tmp; z++) rotate();
 

qucs/components/componentdialog.cpp

@@ -48,7 +48,7 @@ ComponentDialog::ComponentDialog(Component *c, Schematic *d)
   QString s;
   setAllVisible = true; // state when toggling properties visibility
 
-  all = new QVBoxLayout; // to provide neccessary size
+  all = new QVBoxLayout; // to provide necessary size
   this->setLayout(all);
   all->setContentsMargins(1,1,1,1);
   QGridLayout *gp1;
@@ -471,7 +471,7 @@ ComponentDialog::ComponentDialog(Component *c, Schematic *d)
     }
 
 
-  /// \todo add key up/down brose and select prop
+  /// \todo add key up/down browse and select prop
   connect(prop, SIGNAL(itemClicked(QTableWidgetItem*)),
                 SLOT(slotSelectProperty(QTableWidgetItem*)));
 }
@@ -600,7 +600,7 @@ void ComponentDialog::slotSelectProperty(QTableWidgetItem *item)
   }
 
   /// \todo enable edit of description anyway...
-  /// empy or "-" (no comment from verilog-a)
+  /// empty or "-" (no comment from verilog-a)
   if(desc.isEmpty()) {
     // show two line edit fields (name and value)
     ButtAdd->setEnabled(true);
@@ -1156,7 +1156,7 @@ void ComponentDialog::slotEditFile()
   Add description if missing.
   Is called if the add button is pressed. This is only possible for some
  properties.
- If desc is empy, ButtAdd is enabled, this slot handles if it is clicked.
+ If desc is empty, ButtAdd is enabled, this slot handles if it is clicked.
  Used with: Equation, ?
 
  Original behavior for an Equation block
@@ -1220,7 +1220,7 @@ void ComponentDialog::slotButtAdd()
 /*!
  Is called if the remove button is pressed. This is only possible for
  some properties.
- If desc is empy, ButtRem is enabled, this slot handles if it is clicked.
+ If desc is empty, ButtRem is enabled, this slot handles if it is clicked.
  Used with: Equations, ?
 */
 void ComponentDialog::slotButtRem()

qucs/components/components.h

@@ -186,7 +186,7 @@
 #include "etr_sim.h"
 #include "ecvs.h"
 
-// Verilog-A dynamicaly loaded component
+// Verilog-A dynamically loaded component
 #include "vacomponent.h"
 
 #include "bsim3v34nMOS.h"

qucs/components/d_flipflop.cpp

@@ -21,7 +21,7 @@
 D_FlipFlop::D_FlipFlop()
 {
   Type = isDigitalComponent;
-  Description = QObject::tr("D flip flop with asynchron reset");
+  Description = QObject::tr("D flip flop with asynchronous reset");
 
   Props.append(new Property("t", "0", false, QObject::tr("delay time")));
 

qucs/components/diode.cpp

@@ -112,7 +112,7 @@ QString Diode::spice_netlist(bool isXyce)
 
     QStringList spice_incompat,spice_tr;
     if (isXyce) {
-        spice_tr<<"Tbv"<<"Tbv1"<<"Trs"<<"Trs1"; // parameters that need convertion of names
+        spice_tr<<"Tbv"<<"Tbv1"<<"Trs"<<"Trs1"; // parameters that need conversion of names
         spice_incompat<<"Ttt1"<<"Ttt2"<<"Tm1"<<"Tm2"<<"Cp"<<"Isr"
                      <<"Nr"<<"Ffe"<<"Temp"<<"Area"<<"Symbol"; // spice-incompatible parameters
     } else {

qucs/components/eqndefined.cpp

@@ -195,7 +195,7 @@ QString EqnDefined::va_code()
 }
 
 /*!
- * \brief EqnDefined::subsVoltages Substitute volatges in spice Notation in token list
+ * \brief EqnDefined::subsVoltages Substitute voltages in spice Notation in token list
  * \param[in/out] tokens Token list. Should be obtained from spicecompat::splitEqn().
  *                This list is modified.
  * \param[in] Nbranch Number of branched of EDD

qucs/components/equation.cpp

@@ -116,7 +116,7 @@ QString Equation::getVAExpressions()
 }
 
 /*!
- * \brief Equation::getExpression Extract equations that don't contain simualtion variables
+ * \brief Equation::getExpression Extract equations that don't contain simulation variables
  *        (voltages/cureents) in .PARAM section of spice netlist
  * \param isXyce True if Xyce is used.
  * \return .PARAM section of spice netlist as a single string.

qucs/components/jfet.cpp

@@ -109,11 +109,11 @@ QString JFET::spice_netlist(bool isXyce)
         spice_incompat<<"Type"<<"Area"<<"Temp"<<"Ffe"<<"N"
                      <<"Isr"<<"Nr"<<"M"<<"Xti"<<"Betatce"<<"Vt0tc";
                                   // spice-incompatible parameters
-        spice_tr<<"Vt0"<<"VtO"; // parameters that need convertion of names
+        spice_tr<<"Vt0"<<"VtO"; // parameters that need conversion of names
     } else {
         spice_incompat<<"Type"<<"Area"<<"Temp"<<"Ffe"<<"N"<<"Isr"<<"Nr"<<"M"<<"Xti"<<"Betatce";
                                   // spice-incompatible parameters
-        spice_tr<<"Vt0tc"<<"Tcv"; // parameters that need convertion of names
+        spice_tr<<"Vt0tc"<<"Tcv"; // parameters that need conversion of names
     }
 
 

qucs/components/jk_flipflop.cpp

@@ -23,7 +23,7 @@
 JK_FlipFlop::JK_FlipFlop()
 {
   Type = isDigitalComponent;
-  Description = QObject::tr("JK flip flop with asynchron set and reset");
+  Description = QObject::tr("JK flip flop with asynchronous set and reset");
 
   Props.append(new Property("t", "0", false, QObject::tr("delay time")));
 

qucs/components/mosfet.cpp

@@ -155,7 +155,7 @@ QString MOSFET::spice_netlist(bool isXyce)
                  <<"Rg"<<"N"<<"Tt"<<"Nrd"<<"Nrs"<<"Ffe";
                               // spice-incompatible parameters
     if (isXyce) {
-        spice_tr<<"Vt0"<<"VtO"; // parameters that need convertion of names
+        spice_tr<<"Vt0"<<"VtO"; // parameters that need conversion of names
     } else {
         spice_tr.clear();
     }

qucs/components/mosfet_sub.cpp

@@ -162,7 +162,7 @@ QString MOSFET_sub::spice_netlist(bool isXyce)
                  <<"Rg"<<"N"<<"Tt"<<"Nrd"<<"Nrs"<<"Ffe";
                               // spice-incompatible parameters
     if (isXyce) {
-        spice_tr<<"Vt0"<<"VtO"; // parameters that need convertion of names
+        spice_tr<<"Vt0"<<"VtO"; // parameters that need conversion of names
     } else {
         spice_tr.clear();
     }

qucs/components/optimizedialog.cpp

@@ -61,7 +61,7 @@ OptimizeDialog::OptimizeDialog(Optimize_Sim *c_, Schematic *d_)
   numVal = new QDoubleValidator(this);
   intVal = new QIntValidator(this);
 
-  all = new QVBoxLayout(); // to provide the neccessary size
+  all = new QVBoxLayout(); // to provide the necessary size
   QTabWidget *t = new QTabWidget();
   all->addWidget(t);
   this->setLayout(all);

qucs/components/spicedialog.cpp

@@ -49,7 +49,7 @@ SpiceDialog::SpiceDialog(QucsApp* App_, SpiceFile *c, Schematic *d)
   Comp = c;
   Doc  = d;
 
-  all = new QVBoxLayout(); // to provide neccessary size
+  all = new QVBoxLayout(); // to provide necessary size
   this->setLayout(all);
   QWidget *myParent = this;
 

qucs/diagrams/diagram.cpp

@@ -356,7 +356,7 @@ void Diagram::rectClip(Graph::iterator &p) const
 
   int code1 = regionCode(x_1, y_1);
   int code2 = regionCode(x_2, y_2);
-  if((code1 | code2) == 0)  return;  // line completly inside ?
+  if((code1 | code2) == 0)  return;  // line completely inside ?
 
   if(code1 != 0) if((p-3)->isPt()) {
     p++;
@@ -373,7 +373,7 @@ void Diagram::rectClip(Graph::iterator &p) const
 
 
   for(;;) {
-    if((code1 | code2) == 0) break;  // line completly inside ?
+    if((code1 | code2) == 0) break;  // line completely inside ?
 
     if(code1)  code = code1;
     else  code = code2;
@@ -434,7 +434,7 @@ void Diagram::clip(Graph::iterator &p) const
   float dt2 = dt1 - x_2*x_2 - y_2*y_2;
   dt1 -= x_1*x_1 + y_1*y_1;
 
-  if(dt1 >= 0.0) if(dt2 >= 0.0)  return;  // line completly inside ?
+  if(dt1 >= 0.0) if(dt2 >= 0.0)  return;  // line completely inside ?
 
   if(dt1 < 0.0) if((p-3)->isPt()) { // is there already a line end flag ?
     p++;
@@ -708,7 +708,7 @@ void Diagram::loadGraphData(const QString& defaultDataSet)
 
     xAxis.min = xmin; yAxis.min = ymin; zAxis.min = zmin;
     xAxis.max = xmax; yAxis.max = ymax; zAxis.max = zmax;
-    return;    // -> no update neccessary
+    return;    // -> no update necessary
   }
 
   if(xAxis.min > xAxis.max)
@@ -827,7 +827,7 @@ int Graph::loadDatFile(const QString& fileName)
   Info.setFile(file);
   if(g->lastLoaded.isValid())
     if(g->lastLoaded > Info.lastModified())
-      return 1;    // dataset unchanged -> no update neccessary
+      return 1;    // dataset unchanged -> no update necessary
 
   g->countY = 0;
   g->mutable_axes().clear(); // HACK
@@ -897,7 +897,7 @@ int Graph::loadDatFile(const QString& fileName)
     tmp = Line.section(' ', pos, pos);
     while(!tmp.isEmpty()) {
       if (hasExplIndep)g->mutable_axes().push_back(new DataX(ExplIndep));
-      else g->mutable_axes().push_back(new DataX(tmp));  // name of independet variable
+      else g->mutable_axes().push_back(new DataX(tmp));  // name of independent variable
       pos++;
       tmp = Line.section(' ', pos, pos);
     }
@@ -1000,7 +1000,7 @@ if(Variable.right(3) != ".X ") { // not "digital"
       }
     }
 
-#if 0 // this is not location curce code.
+#if 0 // this is not location curve code.
     else {   // location curve needs different treatment
       if(std::isfinite(x)) {
         if(x > xAxis.max) xAxis.max = x;
@@ -1729,7 +1729,7 @@ if(Axis->autoScale) {
   numGrids += corr;     // correct rounding faults
 
 
-  // upper y boundery ...........................
+  // upper y boundary ...........................
   zD = fabs(fmod(Axis->up, GridStep));// expand grid to upper diagram edge ?
   GridNum = zD/GridStep;
   if((1.0-GridNum) < 1e-10) GridNum = 0.0;  // fix rounding errors
@@ -1742,7 +1742,7 @@ if(Axis->autoScale) {
 		 Axis->up += 0.3*GridStep;  // beauty correction
 
 
-  // lower y boundery ...........................
+  // lower y boundary ...........................
   zD = fabs(fmod(Axis->low, GridStep));// expand grid to lower diagram edge ?
   GridNum = zD/GridStep;
   if((1.0-GridNum) < 1e-10) zD = GridNum = 0.0;  // fix rounding errors

qucs/diagrams/diagram.h

@@ -32,7 +32,7 @@
 #define INVALID_STR QObject::tr(" <invalid>")
 
 // ------------------------------------------------------------
-// Enlarge memory block if neccessary.
+// Enlarge memory block if necessary.
 #define  FIT_MEMORY_SIZE  \
   if(p >= p_end) {     \
     int pos = p - g->begin(); \

qucs/diagrams/diagramdialog.cpp

@@ -155,7 +155,7 @@ DiagramDialog::DiagramDialog(Diagram *d, QWidget *parent, Graph *currentGraph)
   }
 
   
-  all = new QVBoxLayout(this); // to provide neccessary size
+  all = new QVBoxLayout(this); // to provide necessary size
   QTabWidget *t = new QTabWidget();
   all->addWidget(t);
 

qucs/diagrams/graph.cpp

@@ -276,7 +276,7 @@ std::pair<double,double> Graph::findSample(std::vector<double>& VarPos) const
   for(unsigned ii=0; (pD=axis(ii)); ++ii) {
     double* pp = pD->Points;
     double v = VarPos[nVarPos];
-    for(unsigned i=pD->count; i>1; i--) {  // find appropiate marker position
+    for(unsigned i=pD->count; i>1; i--) {  // find appropriate marker position
       if(fabs(v-(*pp)) < fabs(v-(*(pp+1)))) break;
       pp++;
       n += m;

qucs/diagrams/rect3ddiagram.cpp

@@ -251,7 +251,7 @@ bool Rect3DDiagram::isHidden(int x, int y, tBound *Bounds, char *zBuffer)
 }
 
 // --------------------------------------------------------------
-// Enlarge memory block if neccessary.
+// Enlarge memory block if necessary.
 void Rect3DDiagram::enlargeMemoryBlock(tPoint3D* &MemEnd)
 {
   if(pMem >= MemEnd) {
@@ -341,7 +341,7 @@ void Rect3DDiagram::calcLine(tPoint3D* &p, tPoint3D* &MemEnd,
         pMem++;
 
         Pos_ = p - Mem;
-        // Enlarge memory block if neccessary.
+        // Enlarge memory block if necessary.
         enlargeMemoryBlock(MemEnd);   // this may make "p" invalid (realloc)
         p = Mem + Pos_;  // rebuild "p"
     }
@@ -472,7 +472,7 @@ void Rect3DDiagram::removeHiddenLines(char *zBuffer, tBound *Bounds)
     // ..........................................
     // Calculate the z-coordinate of all polygons by building the
     // sum of the z-coordinates of all of its 4 corners.
-    // After this, each point represents one polygon. The unneccessary
+    // After this, each point represents one polygon. The unnecessary
     // points are filled with "-FLTMAX".
     zp = zp_tmp;
     // "dx" and "dy" are still unchanged !

qucs/dialogs/labeldialog.cpp

@@ -117,7 +117,7 @@ void LabelDialog::slotOk()
           QMessageBox::warning(this,tr("SPICE checker"),
                                QString(tr("Node name \"%1\" is Nutmeg reserved keyword!\n"
                                           "Please select another node name!\n"
-                                          "Node name will not be chenged.")).arg(nod),
+                                          "Node name will not be changed.")).arg(nod),
                                QMessageBox::Ok);
           slotCancel();
           return;

qucs/dialogs/librarydialog.cpp

@@ -171,7 +171,7 @@ LibraryDialog::LibraryDialog(QWidget *parent)
   createButt->setDisabled(true);
 
 
-  // stacked 2 - show error / sucess message
+  // stacked 2 - show error / success message
   // ...........................................................
   QWidget *msg = new QWidget();
   stackedWidgets->addWidget(msg);
@@ -291,7 +291,7 @@ void LibraryDialog::slotCreateNext()
       }
   }
   else {
-      // save whitout description
+      // save without description
       emit slotSave();
   }
 }

qucs/dialogs/qucssettingsdialog.cpp

@@ -144,13 +144,13 @@ QucsSettingsDialog::QucsSettingsDialog(QucsApp *parent)
 
     appSettingsGrid->addWidget(new QLabel(tr("Draw diagrams with anti-aliasing feature:")));
     checkAntiAliasing = new QCheckBox(appSettingsTab);
-    checkAntiAliasing->setToolTip(tr("Use anti-aliasing for graphs for a smoother appereance."));
+    checkAntiAliasing->setToolTip(tr("Use anti-aliasing for graphs for a smoother appearance."));
     appSettingsGrid->addWidget(checkAntiAliasing,9,1);
     checkAntiAliasing->setChecked(QucsSettings.GraphAntiAliasing);
 
     appSettingsGrid->addWidget(new QLabel(tr("Draw text with anti-aliasing feature:")));
     checkTextAntiAliasing = new QCheckBox(appSettingsTab);
-    checkTextAntiAliasing->setToolTip(tr("Use anti-aliasing for text for a smoother appereance."));
+    checkTextAntiAliasing->setToolTip(tr("Use anti-aliasing for text for a smoother appearance."));
     appSettingsGrid->addWidget(checkTextAntiAliasing,10,1);
     checkTextAntiAliasing->setChecked(QucsSettings.TextAntiAliasing);
 

qucs/dialogs/simmessage.cpp

@@ -219,7 +219,7 @@ void SimMessage::nextSPICE()
       return;
     }
 // FIXME #warning SPICE section below not being covered?
-    qDebug() << "goin thru SPICE branch on simmmessage.cpp";
+    qDebug() << "going thru SPICE branch on simmmessage.cpp";
     if(Line.left(5) == "SPICE") {
       if(Line.at(5) != 'o') insertSim = true;
       else insertSim = false;
@@ -485,9 +485,9 @@ void SimMessage::startSimulator()
            * the schematic,it might be the case that the user loaded the icons,
            * but did not compiled the module. Qucsator will not find the library.
            *
-           * Check if used symbols have corresponing lib before running
+           * Check if used symbols have corresponding lib before running
            * Qucsator? Need to search on the netlis.txt? Is there other data
-           * structure containig the netlist?
+           * structure containing the netlist?
            *
           */
           QStringList usedComponents;
@@ -509,12 +509,12 @@ void SimMessage::startSimulator()
           if (! usedComponents.isEmpty()) {
 
 
-            /// \todo remvoe the command line arguments? use only netlist annotation?
+            /// \todo remove the command line arguments? use only netlist annotation?
             //Arguments << "-p" << QucsSettings.QucsWorkDir.absolutePath()
             //          << "-m" << usedComponents;
             //qDebug() << "Command :" << Program << Arguments.join(" ");
 
-            /// Anotate netlist with Verilog-A dynamic path and module names
+            /// Annotate netlist with Verilog-A dynamic path and module names
             ///
             if (!NetlistFile.open(QFile::Append | QFile::Text))
                QMessageBox::critical(this, tr("Error"), tr("Cannot read netlist!"));

qucs/dialogs/textboxdialog.cpp

@@ -64,7 +64,7 @@ TextBoxDialog::TextBoxDialog(const char* window_title, Component *pc, QWidget *p
 }
 
 /*!
- * \brief CustomSimDialog::slotApply Aplly changes of component properties.
+ * \brief CustomSimDialog::slotApply Apply changes of component properties.
  */
 void TextBoxDialog::slotApply()
 {
@@ -81,7 +81,7 @@ void TextBoxDialog::slotOK()
 }
 
 /*!
- * \brief CustomSimDialog::slotCancel Close dialog without apply chages.
+ * \brief CustomSimDialog::slotCancel Close dialog without applying changes.
  */
 void TextBoxDialog::slotCancel()
 {

qucs/extsimkernels/abstractspicekernel.cpp

@@ -40,7 +40,7 @@
 
 /*!
  * \brief AbstractSpiceKernel::AbstractSpiceKernel class constructor
- * \param sch_ Schematic that schould be simualted with Spice-comaptibele
+ * \param sch_ Schematic that should be simulated with Spice-compatible
  *        simulator
  * \param parent Parent object
  */
@@ -308,8 +308,8 @@ void AbstractSpiceKernel::slotSimulate()
  *        or Complex) from output.
  * \param ngspice_file Spice output file name
  * \param sim_points 2D array in which simulation points should be extracted
- * \param var_list This list is filled by simualtion variables. There is a list of dependent
+ * \param var_list This list is filled by simulation variables. There is a list of dependent
- *        and independent varibales. An independent variable is the first in list.
+ *        and independent variables. An independent variable is the first in list.
  * \param isComplex Type of variables. True if complex. False if real.
  */
 void AbstractSpiceKernel::parseNgSpiceSimOutput(QString ngspice_file,QList< QList<double> > &sim_points,QStringList &var_list, bool &isComplex)
@@ -387,8 +387,8 @@ void AbstractSpiceKernel::parseNgSpiceSimOutput(QString ngspice_file,QList< QLis
  * \brief AbstractSpiceKernel::parseHBOutput Parse Xyce Harmonic balance (HB) simulation output.
  * \param ngspice_file Spice output file name
  * \param sim_points 2D array in which simulation points should be extracted
- * \param var_list This list is filled by simualtion variables. There is a list of dependent
+ * \param var_list This list is filled by simulation variables. There is a list of dependent
- *        varibales. Independent hbfrequency variable is always the first in this list.
+ *        variables. Independent hbfrequency variable is always the first in this list.
  * \param hasParSweep[out] Set to true if dataset contains parameter sweep output.
  */
 void AbstractSpiceKernel::parseHBOutput(QString ngspice_file, QList<QList<double> > &sim_points,
@@ -439,8 +439,8 @@ void AbstractSpiceKernel::parseHBOutput(QString ngspice_file, QList<QList<double
  * \brief AbstractSpiceKernel::parseFourierOutput Parse output of fourier simulation.
  * \param ngspice_file[in] Spice output file name
  * \param sim_points[out] 2D array in which simulation points should be extracted
- * \param var_list[out] This list is filled by simualtion variables. There is a list of dependent
+ * \param var_list[out] This list is filled by simulation variables. There is a list of dependent
- *        and independent varibales. An independent variable is the first in list.
+ *        and independent variables. An independent variable is the first in list.
  */
 void AbstractSpiceKernel::parseFourierOutput(QString ngspice_file, QList<QList<double> > &sim_points,
                                              QStringList &var_list)
@@ -507,8 +507,8 @@ void AbstractSpiceKernel::parseFourierOutput(QString ngspice_file, QList<QList<d
  * \param[in] ngspice_file Spice output file name
  * \param[out] sim_points 2D array in which simulation points should be extracted. All simulation
  *        points from all sweep variable steps are extracted in a single array
- * \param[out] var_list This list is filled by simualtion variables. There is a list of dependent
+ * \param[out] var_list This list is filled by simulation variables. There is a list of dependent
- *        and independent varibales. An independent variable is the first in list.
+ *        and independent variables. An independent variable is the first in list.
  * \param[out] ParSwp Set to true if there was parameter sweep
  */
 void AbstractSpiceKernel::parseNoiseOutput(QString ngspice_file, QList<QList<double> > &sim_points,
@@ -581,12 +581,12 @@ void AbstractSpiceKernel::parsePZOutput(QString ngspice_file, QList<QList<double
 }
 
 /*!
- * \brief AbstractSpiceKernel::parseSENSOutput Parse output after DC sensitivity anlysis.
+ * \brief AbstractSpiceKernel::parseSENSOutput Parse output after DC sensitivity analysis.
  * \param[in] ngspice_file Spice output file name
  * \param[out] sim_points 2D array in which simulation points should be extracted. All simulation
  *        points from all sweep variable steps are extracted in a single array
- * \param[out] var_list This list is filled by simualtion variables. There is a list of dependent
+ * \param[out] var_list This list is filled by simulation variables. There is a list of dependent
- *        and independent varibales. An independent variable is the first in list.
+ *        and independent variables. An independent variable is the first in list.
  */
 void AbstractSpiceKernel::parseSENSOutput(QString ngspice_file, QList<QList<double> > &sim_points,
                                           QStringList &var_list)
@@ -696,8 +696,8 @@ void AbstractSpiceKernel::parseDC_OPoutputXY(QString xyce_file)
  * \param ngspice_file Spice output file name
  * \param sim_points 2D array in which simulation points should be extracted. All simulation
  *        points from all sweep variable steps are extracted in a single array
- * \param var_list This list is filled by simualtion variables. There is a list of dependent
+ * \param var_list This list is filled by simulation variables. There is a list of dependent
- *        and independent varibales. An independent variable is the first in list.
+ *        and independent variables. An independent variable is the first in list.
  * \param isComplex Type of variables. True if complex. False if real.
  */
 void AbstractSpiceKernel::parseSTEPOutput(QString ngspice_file,
@@ -846,8 +846,8 @@ bool AbstractSpiceKernel::extractASCIISamples(QString &lin, QTextStream &ngsp_da
  * \brief AbstractSpiceKernel::parseXYCESTDOutput
  * \param std_file[in] XYCE STD output file name
  * \param sim_points[out] 2D array in which simulation points should be extracted
- * \param var_list[out] This list is filled by simualtion variables. There is a list of dependent
+ * \param var_list[out] This list is filled by simulation variables. There is a list of dependent
- *        and independent varibales. An independent variable is the first in list.
+ *        and independent variables. An independent variable is the first in list.
  * \param isComplex[out] Type of variables. True if complex. False if real.
  */
 void AbstractSpiceKernel::parseXYCESTDOutput(QString std_file, QList<QList<double> > &sim_points,
@@ -1162,7 +1162,7 @@ void AbstractSpiceKernel::convertToQucsData(const QString &qucs_dataset)
             default: break;
             }
         }
-        if (var_list.isEmpty()) continue; // notning to convert
+        if (var_list.isEmpty()) continue; // nothing to convert
         normalizeVarsNames(var_list);
 
         QString indep = var_list.first();

qucs/extsimkernels/customsimdialog.cpp

@@ -98,7 +98,7 @@ CustomSimDialog::CustomSimDialog(SpiceCustomSim *pc, Schematic *sch, QWidget *pa
 }
 
 /*!
- * \brief CustomSimDialog::slotApply Aplly changes of component properties.
+ * \brief CustomSimDialog::slotApply Apply changes of component properties.
  */
 void CustomSimDialog::slotApply()
 {
@@ -117,7 +117,7 @@ void CustomSimDialog::slotOK()
 }
 
 /*!
- * \brief CustomSimDialog::slotCancel Close dialog without apply chages.
+ * \brief CustomSimDialog::slotCancel Close dialog without applying changes.
  */
 void CustomSimDialog::slotCancel()
 {

qucs/extsimkernels/customsimdialog.h

@@ -33,7 +33,7 @@
 
 /*!
  * \brief The CustomSimDialog class is responsible for editing properties
- *        of Ngspice Custom Simualtion component. You can edit multiline
+ *        of Ngspice Custom Simulation component. You can edit multiline
  *        component properties with it.
  */
 class CustomSimDialog : public QDialog

qucs/extsimkernels/externsimdialog.cpp

@@ -228,7 +228,7 @@ void ExternSimDialog::slotNgspiceStartError(QProcess::ProcessError err)
         break;
     case QProcess::Crashed : msg = tr("Simulator crashed!");
         break;
-    default : msg = tr("Simualtor error!");
+    default : msg = tr("Simulator error!");
     }
 
     QMessageBox::critical(this,tr("Simulate with SPICE"),msg,QMessageBox::Ok);

qucs/extsimkernels/ngspice.cpp

@@ -38,7 +38,7 @@
 
 /*!
  * \brief Ngspice::Ngspice Class constructor
- * \param sch_ Schematic that need to be simualted with Ngspice.
+ * \param sch_ Schematic that need to be simulated with Ngspice.
  * \param parent Parent object
  */
 Ngspice::Ngspice(Schematic *sch_, QObject *parent) :
@@ -73,7 +73,7 @@ void Ngspice::createNetlist(QTextStream &stream, int ,
 
     if (DC_OP_only) {
         stream<<".control\n"  // Execute only DC OP analysis
-              <<"set filetype=ascii\n" // Ingnore all other simulations
+              <<"set filetype=ascii\n" // Ignore all other simulations
               <<"op\n"
               <<"print all > spice4qucs.cir.dc_op\n"
               <<"destroy all\n"
@@ -425,7 +425,7 @@ QString Ngspice::getParentSWPscript(Component *pc_swp, QString sim, bool before,
 }
 
 /*!
- * \brief Ngspice::slotSimulate Create netlist and execute Ngspice simualtor. Netlist
+ * \brief Ngspice::slotSimulate Create netlist and execute Ngspice simulator. Netlist
  *        is saved at $HOME/.qucs/spice4qucs/spice4qucs.cir
  */
 void Ngspice::slotSimulate()
@@ -574,7 +574,7 @@ bool Ngspice::findMathFuncInc(QString &mathf_inc)
 }
 
 /*!
- * \brief Ngspice::slotProcessOutput Process Ngspice output and report completetion
+ * \brief Ngspice::slotProcessOutput Process Ngspice output and report completion
  *        percentage.
  */
 void Ngspice::slotProcessOutput()

qucs/extsimkernels/spicecompat.cpp

@@ -200,7 +200,7 @@ bool spicecompat::containNodes(QStringList &tokens, QStringList &vars)
 
 /*!
  * \brief spicecompat::convertNodeNames convert node names form Qucs-notation to
- *        Spice-notation (i.e. Node.Vt --> V(Node) ) and determine used simualtion.
+ *        Spice-notation (i.e. Node.Vt --> V(Node) ) and determine used simulation.
  *        This method modifies the input list of tokens.
  * \param[in/out] tokens
  * \param[out] sim Used simulation.

qucs/extsimkernels/verilogawriter.h

@@ -37,7 +37,7 @@ namespace vacompat {
     QString normalize_value(QString Value);
     void convert_functions(QStringList &tokens);
     QString normalize_voltage(QString &plus, QString &minus); // Exclude gnd nodes from
-    QString normalize_current(QString &plus, QString &minus, bool left_side = false); // currents and volatges
+    QString normalize_current(QString &plus, QString &minus, bool left_side = false); // currents and voltages
 }
 
 class VerilogAwriter

qucs/extsimkernels/xyce.cpp

@@ -29,7 +29,7 @@
 
 /*!
  * \brief Xyce::Xyce Class constructor
- * \param sch_ Schematic that need to be simualted with Ngspice.
+ * \param sch_ Schematic that need to be simulated with Ngspice.
  * \param parent Parent object
  */
 Xyce::Xyce(Schematic *sch_, QObject *parent) :
@@ -269,7 +269,7 @@ void Xyce::createNetlist(QTextStream &stream, int , QStringList &simulations,
 }
 
 /*!
- * \brief Xyce::slotSimulate Execute Xyce simualtor and perform all
+ * \brief Xyce::slotSimulate Execute Xyce simulator and perform all
  *        simulations from the simulationQueue list
  */
 void Xyce::slotSimulate()
@@ -349,7 +349,7 @@ void Xyce::SaveNetlist(QString filename)
 }
 
 /*!
- * \brief Xyce::slotFinished Simualtor finished handler. End simulation or
+ * \brief Xyce::slotFinished Simulator finished handler. End simulation or
  *        execute the next simulation from queue.
  */
 void Xyce::slotFinished()

qucs/main.cpp

@@ -278,8 +278,8 @@ bool saveApplSettings()
  * \param msg Message
  *
  * The message handler is used to get control of the messages.
- * Particulary on Windows, as the messages are sent to the debugger and do not
+ * Particularly on Windows, as the messages are sent to the debugger and do not
- * show on the terminal. The handler could aslo be extended to create a log
+ * show on the terminal. The handler could also be extended to create a log
  * mechanism.
  * <http://qt-project.org/doc/qt-4.8/debug.html#warning-and-debugging-messages>
  * <http://qt-project.org/doc/qt-4.8/qtglobal.html#qInstallMsgHandler>
@@ -670,7 +670,7 @@ void createDocData() {
     char * File;
     QString Name;
 
-    int num = 0; // compoment id inside category
+    int num = 0; // component id inside category
 
     foreach (Module *Mod, Comps) {
         num += 1;
@@ -940,7 +940,7 @@ int main(int argc, char *argv[])
   tor.load( QString("qucs_") + lang, QucsSettings.LangDir);
   a.installTranslator( &tor );
 
-  // This seems to be neccessary on a few system to make strtod()
+  // This seems to be necessary on a few system to make strtod()
   // work properly !???!
   setlocale (LC_NUMERIC, "C");
 

qucs/messagedock.cpp

@@ -194,7 +194,7 @@ void MessageDock::slotCursor()
         }
     }
 
-  // \todo set hightlight in QucsDoc Verilog-A file?
+  // \todo set highlight in QucsDoc Verilog-A file?
   // move cursor? addt line number? highliht line number? set in focus
 
     /*
@@ -218,7 +218,7 @@ void MessageDock::slotCursor()
         int pos = d->document()->findBlockByLineNumber(gotoLine-1).position();
         cursor.setPosition(pos);
 
-        // Highligt a give line
+        // Highlight a give line
         QList<QTextEdit::ExtraSelection> extraSelections;
         QTextEdit::ExtraSelection selection;
         QColor lineColor = QColor(Qt::yellow).lighter(160);

qucs/misc.cpp

@@ -175,7 +175,7 @@ QString misc::StringNiceNum(double num)
     if(p) {
       if(!pe)  pe = Buffer + strlen(Buffer);
       p = pe-1;
-      while(*p == '0')   // looking for unneccessary zero characters
+      while(*p == '0')   // looking for unnecessary zero characters
         if((--p) <= Buffer)  break;
       if(*p != '.')  p++;  // no digit after decimal point ?
       while( (*(p++) = *(pe++)) != 0 ) ;  // overwrite zero characters

qucs/mouseactions.cpp

@@ -963,7 +963,7 @@ void MouseActions::MPressSelect(Schematic *Doc, QMouseEvent *Event, float fX, fl
   MAx1 = int(fX);
   MAy1 = int(fY);
   focusElement = Doc->selectElement(fX, fY, Ctrl, &No);
-  isMoveEqual = false;   // moving not neccessarily square
+  isMoveEqual = false;   // moving not necessarily square
 
   if(focusElement)
     // print define value in hex, see element.h
@@ -1033,7 +1033,7 @@ void MouseActions::MPressSelect(Schematic *Doc, QMouseEvent *Event, float fX, fl
           QucsMain->MouseDoubleClickAction = 0;
           Doc->grabKeyboard();  // no keyboard inputs during move actions
 
-          // Remember inital scroll bar position.
+          // Remember initial scroll bar position.
           MAx2 = int(((TabDiagram*)focusElement)->xAxis.limit_min);
           // Update matching wire label highlighting
           Doc->highlightWireLabels ();
@@ -1303,7 +1303,7 @@ void MouseActions::MPressElement(Schematic *Doc, QMouseEvent *Event, float, floa
       default: ;   // avoids compiler warnings
     }
 //    qDebug() << "   => selElem = Comp;" << Comp->Name;
-    // comp it geting empty
+    // comp it getting empty
     selElem = Comp;
     return;
 

qucs/octave/plotTimeFFT.m

@@ -16,7 +16,7 @@
 % Xstop				X axis stop value (real).
 % Linewidth			Thickness of plotted line in pixels (integer).
 % FTime				Transient simulation FTime (real)
-% Freqmin                       FFT plot minimum frequeny (Hz).
+% Freqmin                       FFT plot minimum frequency (Hz).
 % Freqmax         		FFT plot maximum frequency (Hz).
 %
 % Function written with Octave version >= 3.2.4

qucs/octave_window.cpp

@@ -91,7 +91,7 @@ bool OctaveWindow::startOctave()
 
   QString OctavePath = QDir::toNativeSeparators(QucsSettings.OctaveExecutable);
 
-  // Override Octave path by enviroment variable if it is set
+  // Override Octave path by environment variable if it is set
   if (QucsSettings.QucsOctave.isEmpty()) Program = OctavePath;
   else Program = QucsSettings.QucsOctave;
 
@@ -108,7 +108,7 @@ bool OctaveWindow::startOctave()
   QString sep(":");
 #endif
 
-  // append process PATH, othewise Octave does not find gnuplot
+  // append process PATH, otherwise Octave does not find gnuplot
   QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
   env.insert("PATH", env.value("PATH") + sep + QucsSettings.BinDir );
   octProcess.setProcessEnvironment(env);

qucs/paintings/filldialog.cpp

@@ -37,7 +37,7 @@ FillDialog::FillDialog(const QString& _Caption, bool show, QWidget *parent)
 {
   setWindowTitle(_Caption);
 
-  all = new QVBoxLayout(this); // to provide the neccessary size
+  all = new QVBoxLayout(this); // to provide the necessary size
   QTabWidget *t = new QTabWidget(this);
   all->addWidget(t);
 

qucs/python/qucs-py/qucs.py

@@ -1,6 +1,6 @@
 #!/usr/bin/python
 # QUCS->Python+pylab converter ver.1.0
-# Public domain code, writter by Wojciech M. Zabolotny
+# Public domain code, written by Wojciech M. Zabolotny
 # ( wzab<at>ise.pw.edu.pl ) 20.01.2009
 import sys
 import pylab
@@ -20,7 +20,7 @@ class qucs_data:
         if l != "<Qucs Dataset 0.0.18>":
            raise("This is not a qucs data file!")
         # Now we should start reading dependent vars, and independent vars
-        # The next line should be either dependend variable or independent variable
+        # The next line should be either dependent variable or independent variable
         while True:
           l=f.readline().strip()
           if l=="":

qucs/qucs.cpp

@@ -675,7 +675,7 @@ void QucsApp::slotSetCompView (int index)
   QString Name;
   pInfoFunc Infos = 0;
 
-  // if something was registered dynamicaly, get and draw icons into dock
+  // if something was registered dynamically, get and draw icons into dock
   if (item == QObject::tr("verilog-a user devices")) {
 
     compIdx = 0;
@@ -683,7 +683,7 @@ void QucsApp::slotSetCompView (int index)
     while (i.hasNext()) {
       i.next();
 
-      // default icon initally matches the module name
+      // default icon initially matches the module name
       //Name = i.key();
 
       // Just need path to bitmap, do not create an object
@@ -1797,7 +1797,7 @@ void QucsApp::slotChangeView()
   if (isTextDocument (w)) {
     TextDoc *d = (TextDoc*)w;
     Doc = (QucsDoc*)d;
-    // update menu entries, etc. if neccesary
+    // update menu entries, etc. if necessary
     magAll->setDisabled(true);
     if(cursorLeft->isEnabled())
       switchSchematicDoc (false);
@@ -2126,7 +2126,7 @@ void QucsApp::slotSimulate()
 // Is called after the simulation process terminates.
 void QucsApp::slotAfterSimulation(int Status, SimMessage *sim)
 {
-  if(Status != 0) return;  // errors ocurred ?
+  if(Status != 0) return;  // errors occurred ?
 
   if(sim->ErrText->document()->lineCount() > 1)   // were there warnings ?
     slotShowWarnings();
@@ -2421,7 +2421,7 @@ void QucsApp::slotSelectLibComponent(QTreeWidgetItem *item)
     // if the current document is a schematic activate the paste
     if(!isTextDocument(Doc))
     {
-        // if theres not a higher level item, this is a top level item,
+        // if there's not a higher level item, this is a top level item,
         // not a component item so return
         if(item->parent() == 0) return;
         if(item->text(1).isEmpty()) return;   // return, if not a subcircuit
@@ -2750,13 +2750,13 @@ void QucsApp::updateSchNameHash(void)
     // now go through the paths creating a map to all the schematic files
     // found in the directories. Note that we go through the list of paths from
     // first index to last index. Since keys are unique it means schematic files
-    // in directories at the end of the list take precendence over those at the
+    // in directories at the end of the list take precedence over those at the
     // start of the list, we should warn about shadowing of schematic files in
     // this way in the future
     QStringList nameFilter;
     nameFilter << "*.sch";
 
-    // clear out any existing hash table entriess
+    // clear out any existing hash table entries
     schNameHash.clear();
 
     foreach (QString qucspath, qucsPathList) {
@@ -2793,11 +2793,11 @@ void QucsApp::updateSpiceNameHash(void)
     // now go through the paths creating a map to all the spice files
     // found in the directories. Note that we go through the list of paths from
     // first index to last index. Since keys are unique it means spice files
-    // in directories at the end of the list take precendence over those at the
+    // in directories at the end of the list take precedence over those at the
     // start of the list, we should warn about shadowing of spice files in
     // this way in the future
 
-    // clear out any existing hash table entriess
+    // clear out any existing hash table entries
     spiceNameHash.clear();
 
     foreach (QString qucspath, qucsPathList) {

qucs/qucs.h

@@ -283,7 +283,7 @@ private:
 
   QToolBar *fileToolbar, *editToolbar, *viewToolbar, *workToolbar;
 
-  // Shortcuts for scolling schematic / TextEdit
+  // Shortcuts for scrolling schematic / TextEdit
   // This is rather cumbersome -> Make this with a QScrollView instead??
   QShortcut *cursorUp, *cursorLeft, *cursorRight, *cursorDown;
 

qucs/qucs_actions.cpp

@@ -1446,7 +1446,7 @@ void QucsApp::slotLoadModule()
       // inform if symbol changed
       // populate Module::vaComponents
       // vaComponents are selected with the dialog
-      // dialog should populate acording to checkboxes
+      // dialog should populate according to checkboxes
       // build vaComponents QMap
 
       // remove all previously registered modules
@@ -1472,7 +1472,7 @@ void QucsApp::slotLoadModule()
         // icons of dynamically registered components ready to be dragged
       }
       else {
-        // remove any previously registerd icons from the listview
+        // remove any previously registered icons from the listview
         int foundCat = CompChoose->findText(QObject::tr("verilog-a user devices"));
         if (foundCat != -1) {
           CompChoose->setCurrentIndex(foundCat);
@@ -1527,7 +1527,7 @@ void QucsApp::slotBuildModule()
 
     QString workDir = QucsSettings.QucsWorkDir.absolutePath();
 
-    // need to cd into project to make sure output is droped there?
+    // need to cd into project to make sure output is dropped there?
     // need to cd - into previous location?
     QDir::setCurrent(workDir);
 
@@ -1545,7 +1545,7 @@ void QucsApp::slotBuildModule()
     admsXml = QDir::toNativeSeparators(admsXml+"/"+"admsXml");
 #endif
 
-    // admsXml emmits C++
+    // admsXml emits C++
     QStringList Arguments;
     Arguments << "-f" <<  QDir::toNativeSeparators(include.absoluteFilePath("va2cpp.makefile"))
               << QString("ADMSXML=%1").arg(admsXml)

qucs/qucs_init.cpp

@@ -1053,7 +1053,7 @@ void QucsApp::slotViewStatusBar(bool toggle)
 }
 
 // ----------------------------------------------------------
-// turn Brwose Dock Window on or off
+// turn Browse Dock Window on or off
 void QucsApp::slotViewBrowseDock(bool toggle)
 {
   dock->setVisible(toggle);

qucs/schematic.cpp

@@ -1900,7 +1900,7 @@ void Schematic::contentsWheelEvent(QWheelEvent *Event)
   }
   // ...................................................................
   else if(Event->modifiers() & Qt::ControlModifier) {  // use mouse wheel to zoom ?
-      // zoom factor scaled according to the wheel delta, to accomodate
+      // zoom factor scaled according to the wheel delta, to accommodate
       //  values different from 60 (slower or faster zoom)
       int delta = Event->angleDelta().y();
       float Scaling = pow(1.1, delta/60.0);

qucs/schematic_file.cpp

@@ -983,7 +983,7 @@ QString Schematic::createSymbolUndoString(char Op)
 }
 
 // -------------------------------------------------------------
-// Is quite similiar to "loadDocument()" but with less error checking.
+// Is quite similar to "loadDocument()" but with less error checking.
 // Used for "undo" function.
 bool Schematic::rebuild(QString *s)
 {
@@ -1801,7 +1801,7 @@ bool Schematic::createSubNetlist(QTextStream *stream, int& countInit,
       AbstractSpiceKernel *kern = new AbstractSpiceKernel(this);
       QStringList err_lst;
       if (!kern->checkSchematic(err_lst)) {
-          QString s = QString("Subcircuit %1 conatins SPICE-incompatible components.\n"
+          QString s = QString("Subcircuit %1 contains SPICE-incompatible components.\n"
                               "Check these components: %2 \n")
                   .arg(this->DocName).arg(err_lst.join("; "));
           ErrText->insertPlainText(s);

qucs/spicecomponents/CMakeLists.txt

@@ -1,4 +1,4 @@
-# qucs/componenets library
+# qucs/components library
 
 INCLUDE_DIRECTORIES( ${CMAKE_SOURCE_DIR}
                      ${CMAKE_CURRENT_SOURCE_DIR} )

qucs/textdoc.cpp

@@ -95,7 +95,7 @@ TextDoc::~TextDoc()
 /*!
  * \brief TextDoc::setLanguage(const QString&)
  * \param FileName Text document file name
- * Extract the file name suffix and assing a language_type to it.
+ * Extract the file name suffix and assign a language_type to it.
  */
 void TextDoc::setLanguage (const QString& FileName)
 {
@@ -116,7 +116,7 @@ void TextDoc::setLanguage (const QString& FileName)
 /*!
  * \brief TextDoc::setLanguage(int)
  * \param lang is a language_type
- * Assing value to text document object language variable
+ * Assign value to text document object language variable
  */
 void TextDoc::setLanguage (int lang)
 {

qucs/viewpainter.h

@@ -24,9 +24,9 @@ class QColor;
 
 #define TO_INT(f)   (f > 0.0 ? int(f + 0.5) : int(f - 0.5))
 
-/* This class is neccessary because scaled fonts looks very ungly.
+/* This class is necessary because scaled fonts looks very ugly.
    Avoiding this is unfortunately not easy.
-   This class scales the font point size instead of the font glyphes.
+   This class scales the font point size instead of the font glyphs.
    But this has the disadvantage, that the text size does not increase
    equally with the rest of the drawing. We therefore must compute
    some thing anew each time the paint function is called. The class

translations/CMakeLists.txt

@@ -32,7 +32,7 @@ ENDIF (UPDATE_TRANSLATIONS)
 #FILE(GLOB QtTRANSLATIONS qtgeneric_*.ts)
 
 #
-# install tranlations
+# install translations
 INSTALL( FILES ${QM_FILES} DESTINATION share/${QUCS_NAME}/lang)
 
 # prevent the generated files from being deleted during make clean