SIM/qucs_s
1
0
Fork 0
mirror of https://github.com/ra3xdh/qucs_s synced 2025-03-28 21:13:26 +00:00
Code Issues Packages Projects Releases Wiki Activity
qucs_s/qucs-activefilter/mfbfilter.cpp
Guilherme Brondani Torri 8fd9ce6c94 use same convention for directory name 
* Use `qucs-[name of tool]` for directory
2014-10-03 19:29:06 +02:00

265 lines
11 KiB
C++
Raw Blame History

/***************************************************************************
mfbfilter.cpp
----------------
begin : Wed Apr 10 2014
copyright : (C) 2014 by Vadim Kuznetsov
email : ra3xdh@gmail.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "mfbfilter.h"
MFBfilter::MFBfilter(Filter::FilterFunc ffunc_, Filter::FType type_, FilterParam par)
: Filter(ffunc_,type_,par)
{
switch (ftype) {
case Filter::LowPass :
Nr1=3;
Nc1=2;
break;
case Filter::HighPass :
Nr1=2;
Nc1=3;
break;
default:
break;
}
//Nr1 = 3;
//Nc1 = 2;
Nop1 = 1;
}
void MFBfilter::createLowPassSchematic(QString &s)
{
//int const N_R=4; // number of resisitors in 2-order Sallen-Key stage
//int const N_C=2; // number of capacitors in 2-order Sallen-Key stage
RC_elements stage;
int dx = 0;
int N2ord = order/2; // number of 2-nd order stages
int N1stOrd = order%2; // number of 1-st order stages
s += "<Qucs Schematic ";
s += PACKAGE_VERSION;
s += ">\n";
s += "<Components>\n";
s += QString("<.AC AC1 1 300 440 0 61 0 0 \"lin\" 1 \"1 Hz\" 1 \"%1 kHz\" 1 \"501\" 1 \"no\" 0>\n").arg((10.0*Fc)/1000.0);
s += "<.DC DC1 1 60 440 0 61 0 0 \"26.85\" 0 \"0.001\" 0 \"1 pA\" 0 \"1 uV\" 0 \"no\" 0 \"150\" 0 \"no\" 0 \"none\" 0 \"CroutLU\" 0>\n";
s += "<Eqn Eqn1 1 610 450 -30 14 0 0 \"K=dB(out.v/in.v)\" 1 \"yes\" 0>\n";
s += QString("<Vac V1 1 %1 330 18 -26 0 1 \"1 V\" 1 \"1 kHz\" 0 \"0\" 0 \"0\" 0>\n").arg(70+dx);
s += QString("<GND * 1 %1 360 0 0 0 0>\n").arg(70+dx);
for (int i=1; i<=N2ord; i++) {
stage = Sections.at(i-1);
qDebug()<<stage.N;
QString suffix1, suffix2;
float C1 = autoscaleCapacitor(stage.C1,suffix1);
float C2 = autoscaleCapacitor(stage.C2,suffix2);
s += QString("<GND * 1 %1 380 0 0 0 0>\n").arg(200+dx);
s += QString("<GND * 1 %1 350 0 0 0 0>\n").arg(360+dx);
s += QString("<OpAmp OP%1 1 %2 270 -26 -70 1 0 \"1e6\" 1 \"15 V\" 0>\n").arg(1+(i-1)*Nop1).arg(390+dx);
s += QString("<C C%1 1 %2 350 17 -26 0 1 \"%3%4\" 1 \"\" 0 \"neutral\" 0>\n").arg(2+(i-1)*Nc1).arg(200+dx).arg(C2,0,'f',3).arg(suffix2);
s += QString("<C C%1 1 %2 180 17 -26 0 1 \"%3%4\" 1 \"\" 0 \"neutral\" 0>\n").arg(1+(i-1)*Nc1).arg(320+dx).arg(C1,0,'f',3).arg(suffix1);
s += QString("<R R%1 1 %2 180 15 -26 0 1 \"%3k\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"european\" 0>\n").arg(1+(i-1)*Nr1).arg(200+dx).arg(stage.R1,0,'f',3);
s += QString("<R R%1 1 %2 250 -26 15 0 0 \"%3k\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"european\" 0>\n").arg(2+(i-1)*Nr1).arg(150+dx).arg(stage.R2,0,'f',3);
s += QString("<R R%1 1 %2 250 -26 15 0 0 \"%3k\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"european\" 0>\n").arg(3+(i-1)*Nr1).arg(250+dx).arg(stage.R3,0,'f',3);
dx += 510;
}
if (N1stOrd!=0) {
createFirstOrderComponentsLPF(s,Sections.last(),dx+10);
}
s += "</Components>\n";
s += "<Wires>\n";
dx = 0;
s += "<70 250 120 250 \"in\" 120 220 22 \"\">\n";
s += "<70 250 70 300 \"\" 0 0 0 \"\">\n";
for (int i=1; i<=N2ord; i++) {
if (i!=1) {
s += QString("<%1 250 %2 270 \"\" 0 0 0 \"\">\n").arg(120+dx).arg(120+dx);
s += QString("<%1 270 %2 270 \"\" 0 0 0 \"\">\n").arg(dx-40).arg(120+dx);
}
s += QString("<%1 250 %2 250 \"\" 0 0 0 \"\">\n").arg(180+dx).arg(200+dx);
s += QString("<%1 250 %2 250 \"\" 0 0 0 \"\">\n").arg(200+dx).arg(220+dx);
s += QString("<%1 210 %2 250 \"\" 0 0 0 \"\">\n").arg(200+dx).arg(200+dx);
s += QString("<%1 250 %2 320 \"\" 0 0 0 \"\">\n").arg(200+dx).arg(200+dx);
s += QString("<%1 290 %2 350 \"\" 0 0 0 \"\">\n").arg(360+dx).arg(360+dx);
s += QString("<%1 130 %2 150 \"\" 0 0 0 \"\">\n").arg(200+dx).arg(200+dx);
s += QString("<%1 130 %2 130 \"\" 0 0 0 \"\">\n").arg(200+dx).arg(320+dx);
s += QString("<%1 130 %2 150 \"\" 0 0 0 \"\">\n").arg(320+dx).arg(320+dx);
s += QString("<%1 250 %2 250 \"\" 0 0 0 \"\">\n").arg(280+dx).arg(320+dx);
s += QString("<%1 250 %2 250 \"\" 0 0 0 \"\">\n").arg(320+dx).arg(360+dx);
s += QString("<%1 210 %2 250 \"\" 0 0 0 \"\">\n").arg(320+dx).arg(320+dx);
s += QString("<%1 130 %2 130 \"\" 0 0 0 \"\">\n").arg(320+dx).arg(470+dx);
s += QString("<%1 270 %2 270 \"\" 0 0 0 \"\">\n").arg(430+dx).arg(470+dx);
if ((2*i)==order) {
s += QString("<%1 130 %2 270 \"out\" %3 170 70 \"\">\n").arg(470+dx).arg(470+dx).arg(500+dx);
} else {
s += QString("<%1 130 %2 270 \"\" 0 0 0 \"\">\n").arg(470+dx).arg(470+dx);
}
dx += 510;
}
if (N1stOrd!=0) {
createFirstOrderWires(s,dx+10,270);
}
s += "</Wires>\n";
}
void MFBfilter::createHighPassSchematic(QString &s)
{
RC_elements stage;
int dx = 0;
int N2ord = order/2; // number of 2-nd order stages
int N1stOrd = order%2; // number of 1-st order stages
s += "<Qucs Schematic ";
s += PACKAGE_VERSION;
s += ">\n";
s += "<Components>\n";
s += QString("<.AC AC1 1 300 440 0 61 0 0 \"lin\" 1 \"1 Hz\" 1 \"%1 kHz\" 1 \"501\" 1 \"no\" 0>\n").arg((10.0*Fc)/1000.0);
s += "<.DC DC1 1 60 440 0 61 0 0 \"26.85\" 0 \"0.001\" 0 \"1 pA\" 0 \"1 uV\" 0 \"no\" 0 \"150\" 0 \"no\" 0 \"none\" 0 \"CroutLU\" 0>\n";
s += "<Eqn Eqn1 1 610 450 -30 14 0 0 \"K=dB(out.v/in.v)\" 1 \"yes\" 0>\n";
s += QString("<Vac V1 1 %1 330 18 -26 0 1 \"1 V\" 1 \"1 kHz\" 0 \"0\" 0 \"0\" 0>\n").arg(70+dx);
s += QString("<GND * 1 %1 360 0 0 0 0>\n").arg(70+dx);
for (int i=1; i<=N2ord; i++) {
stage = Sections.at(i-1);
qDebug()<<stage.N;
QString suffix1, suffix2;
float C1 = autoscaleCapacitor(stage.C1,suffix1);
float C2 = autoscaleCapacitor(stage.C2,suffix2);
s += QString("<GND * 1 %1 380 0 0 0 0>\n").arg(200+dx);
s += QString("<GND * 1 %1 350 0 0 0 0>\n").arg(360+dx);
s += QString("<OpAmp OP%1 1 %2 270 -26 -70 1 0 \"1e6\" 1 \"15 V\" 0>\n").arg(1+(i-1)*Nop1).arg(390+dx);
s += QString("<R R%1 1 %2 350 17 -26 0 1 \"%3k\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"european\" 0>\n").arg(1+(i-1)*Nr1).arg(200+dx).arg(stage.R1,0,'f',3);
s += QString("<R R%1 1 %2 180 17 -26 0 1 \"%3k\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"european\" 0>\n").arg(2+(i-1)*Nr1).arg(320+dx).arg(stage.R2,0,'f',3);
s += QString("<C C%1 1 %2 180 15 -26 0 1 \"%3%4\" 1 \"\" 0 \"neutral\" 0>\n").arg(1+(i-1)*Nc1).arg(200+dx).arg(C1,0,'f',3).arg(suffix1);
s += QString("<C C%1 1 %2 250 -26 15 0 0 \"%3%4\" 1 \"\" 0 \"neutral\" 0>\n").arg(2+(i-1)*Nc1).arg(150+dx).arg(C2,0,'f',3).arg(suffix2);
s += QString("<C C%1 1 %2 250 -26 15 0 0 \"%3%4\" 1 \"\" 0 \"neutral\" 0>\n").arg(3+(i-1)*Nc1).arg(250+dx).arg(C1,0,'f',3).arg(suffix1);
dx += 510;
}
if (N1stOrd!=0) {
createFirstOrderComponentsHPF(s,Sections.last(),dx+10);
}
s += "</Components>\n";
s += "<Wires>\n";
dx = 0;
s += "<70 250 120 250 \"in\" 120 220 22 \"\">\n";
s += "<70 250 70 300 \"\" 0 0 0 \"\">\n";
for (int i=1; i<=N2ord; i++) {
if (i!=1) {
s += QString("<%1 250 %2 270 \"\" 0 0 0 \"\">\n").arg(120+dx).arg(120+dx);
s += QString("<%1 270 %2 270 \"\" 0 0 0 \"\">\n").arg(dx-40).arg(120+dx);
}
s += QString("<%1 250 %2 250 \"\" 0 0 0 \"\">\n").arg(180+dx).arg(200+dx);
s += QString("<%1 250 %2 250 \"\" 0 0 0 \"\">\n").arg(200+dx).arg(220+dx);
s += QString("<%1 210 %2 250 \"\" 0 0 0 \"\">\n").arg(200+dx).arg(200+dx);
s += QString("<%1 250 %2 320 \"\" 0 0 0 \"\">\n").arg(200+dx).arg(200+dx);
s += QString("<%1 290 %2 350 \"\" 0 0 0 \"\">\n").arg(360+dx).arg(360+dx);
s += QString("<%1 130 %2 150 \"\" 0 0 0 \"\">\n").arg(200+dx).arg(200+dx);
s += QString("<%1 130 %2 130 \"\" 0 0 0 \"\">\n").arg(200+dx).arg(320+dx);
s += QString("<%1 130 %2 150 \"\" 0 0 0 \"\">\n").arg(320+dx).arg(320+dx);
s += QString("<%1 250 %2 250 \"\" 0 0 0 \"\">\n").arg(280+dx).arg(320+dx);
s += QString("<%1 250 %2 250 \"\" 0 0 0 \"\">\n").arg(320+dx).arg(360+dx);
s += QString("<%1 210 %2 250 \"\" 0 0 0 \"\">\n").arg(320+dx).arg(320+dx);
s += QString("<%1 130 %2 130 \"\" 0 0 0 \"\">\n").arg(320+dx).arg(470+dx);
s += QString("<%1 270 %2 270 \"\" 0 0 0 \"\">\n").arg(430+dx).arg(470+dx);
if ((2*i)==order) {
s += QString("<%1 130 %2 270 \"out\" %3 170 70 \"\">\n").arg(470+dx).arg(470+dx).arg(500+dx);
} else {
s += QString("<%1 130 %2 270 \"\" 0 0 0 \"\">\n").arg(470+dx).arg(470+dx);
}
dx += 510;
}
if (N1stOrd!=0) {
createFirstOrderWires(s,dx+10,270);
}
s += "</Wires>\n";
}
void MFBfilter::calcHighPass()
{
float R1,R2,C1,C2;
float Wc = 2*M_PI*Fc;
for (int k=1; k <= order/2; k++) {
float re = Poles.at(k-1).real();
float im = Poles.at(k-1).imag();
float B = -2.0*re;
float C = re*re + im*im;
qDebug()<<B<<C;
C1 = 10.0/Fc;
C2 = C1/Kv;
R1 = B/((2*C1+C2)*Wc);
R2 = ((2*C1 + C2)*C)/(B*C1*C2*Wc);
RC_elements curr_stage;
curr_stage.N = k;
curr_stage.R1 = 1000*R1;
curr_stage.R2 = 1000*R2;
curr_stage.R3 = 0;
curr_stage.R4 = 0;
curr_stage.R5 = 0;
curr_stage.C1 = C1;
curr_stage.C2 = C2;
Sections.append(curr_stage);
}
this->calcFirstOrder();
}
void MFBfilter::calcLowPass()
{
float R1,R2,R3,C1,C2;
float Wc = 2*M_PI*Fc;
for (int k=1; k <= order/2; k++) {
float re = Poles.at(k-1).real();
float im = Poles.at(k-1).imag();
float B = -2.0*re;
float C = re*re + im*im;
qDebug()<<B<<C;
C2 = (10.0/Fc);
C1 = (B*B*C2)/(4*C*(Kv+1));
R2 = (2*(Kv+1))/(Wc*(B*C2+sqrt(B*B*C2*C2-4*C*C1*C2*(Kv+1))));
R1 = R2/Kv;
R3 = 1.0/(C*C1*C2*Wc*Wc*R2);
RC_elements curr_stage;
curr_stage.N = k;
curr_stage.R1 = 1000*R1;
curr_stage.R2 = 1000*R2;
curr_stage.R3 = 1000*R3;
curr_stage.R4 = 0;
curr_stage.R5 = 0;
curr_stage.C1 = C1;
curr_stage.C2 = C2;
Sections.append(curr_stage);
}
this->calcFirstOrder();
}
Reference in New Issue View Git Blame Copy Permalink