jfet.cpp
----------
begin : Fri Jun 4 2004
copyright : (C) 2003 by Michael Margraf
email : michael.margraf@alumni.tu-berlin.de
***************************************************************************/
* *
* 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. *
* *
***************************************************************************/
#include "jfet.h"
#include "node.h"
#include "extsimkernels/spicecompat.h"
JFET::JFET() {
Description = QObject::tr("junction field-effect transistor");
Props.append(new Property("Type", "nfet", true,
QObject::tr("polarity") + " [nfet, pfet]"));
Props.append(new Property("Vt0", "-2.0 V", true,
QObject::tr("threshold voltage")));
Props.append(new Property("Beta", "1e-4", true,
QObject::tr("transconductance parameter")));
Props.append(new Property("Lambda", "0.0", true,
QObject::tr("channel-length modulation parameter")));
Props.append(new Property("Rd", "0.0", false,
QObject::tr("parasitic drain resistance")));
Props.append(new Property("Rs", "0.0", false,
QObject::tr("parasitic source resistance")));
Props.append(new Property("Is", "1e-14", false,
QObject::tr("gate-junction saturation current")));
Props.append(new Property("N", "1.0", false,
QObject::tr("gate-junction emission coefficient")));
Props.append(new Property("Isr", "1e-14", false,
QObject::tr("gate-junction recombination current parameter")));
Props.append(new Property("Nr", "2.0", false,
QObject::tr("Isr emission coefficient")));
Props.append(new Property("Cgs", "0.0", false,
QObject::tr("zero-bias gate-source junction capacitance")));
Props.append(new Property("Cgd", "0.0", false,
QObject::tr("zero-bias gate-drain junction capacitance")));
Props.append(new Property("Pb", "1.0", false,
QObject::tr("gate-junction potential")));
Props.append(new Property("Fc", "0.5", false,
QObject::tr("forward-bias junction capacitance coefficient")));
Props.append(new Property("M", "0.5", false,
QObject::tr("gate P-N grading coefficient")));
Props.append(new Property("Kf", "0.0", false,
QObject::tr("flicker noise coefficient")));
Props.append(new Property("Af", "1.0", false,
QObject::tr("flicker noise exponent")));
Props.append(new Property("Ffe", "1.0", false,
QObject::tr("flicker noise frequency exponent")));
Props.append(new Property("Temp", "26.85", false,
QObject::tr("simulation temperature in degree Celsius")));
Props.append(new Property("Xti", "3.0", false,
QObject::tr("saturation current temperature exponent")));
Props.append(new Property("Vt0tc", "0.0", false,
QObject::tr("Vt0 temperature coefficient")));
Props.append(new Property("Betatce", "0.0", false,
QObject::tr("Beta exponential temperature coefficient")));
Props.append(new Property("Tnom", "26.85", false,
QObject::tr("temperature at which parameters were extracted")));
Props.append(new Property("Area", "1.0", false,
QObject::tr("default area for JFET")));
Props.append(new Property("UseGlobTemp", "yes", false,
QObject::tr("Use global SPICE temperature")+" [yes,no]"));
createSymbol();
tx = x2 + 4;
ty = y1 + 4;
Model = "JFET";
Name = "T";
SpiceModel = "J";
SpiceModelcards.append("NJF");
SpiceModelcards.append("PJF");
}
Component* JFET::newOne()
{
JFET* p = new JFET();
p->Props.front()->Value = Props.front()->Value;
p->recreate(0);
return p;
}
QString JFET::spice_netlist(spicecompat::SpiceDialect dialect )
{
QString s = spicecompat::check_refdes(Name,SpiceModel);
QList<int> pin_seq;
pin_seq<<1<<0<<2;
for (int pin : pin_seq) {
QString nam = Ports.at(pin)->Connection->Name;
if (nam=="gnd") nam = "0";
s += " "+ nam;
}
QStringList spice_incompat,spice_tr;
if (dialect == spicecompat::SPICEXyce) {
spice_incompat<<"Type"<<"Area"<<"Temp"<<"Ffe"<<"N"
<<"Isr"<<"Nr"<<"M"<<"Xti"<<"Betatce"<<"Vt0tc"<<"UseGLobTemp";
spice_tr<<"Vt0"<<"VtO";
} else {
spice_incompat<<"Type"<<"Area"<<"Temp"<<"Ffe"<<"N"<<"Isr"<<"Nr"<<"M"<<"Xti"<<"Betatce"<<"UseGlobTemp";
spice_tr<<"Vt0tc"<<"Tcv";
}
QString par_str = form_spice_param_list(spice_incompat,spice_tr);
QString jfet_type = getProperty("Type")->Value.at(0).toUpper();
if (getProperty("UseGlobTemp")->Value == "yes") {
s += QStringLiteral(" JMOD_%1 %2\n").arg(Name).arg(getProperty("Area")->Value);
} else {
s += QStringLiteral(" JMOD_%1 %2 TEMP=%3\n").arg(Name).arg(getProperty("Area")->Value)
.arg(getProperty("Temp")->Value);
}
if (dialect != spicecompat::CDL)
{
s += QStringLiteral(".MODEL JMOD_%1 %2JF (%3)\n").arg(Name).arg(jfet_type).arg(par_str);
}
return s;
}
QString JFET::cdl_netlist()
{
return spice_netlist(spicecompat::CDL);
}
Element* JFET::info(QString& Name, char* &BitmapFile, bool getNewOne)
{
Name = QObject::tr("n-JFET");
BitmapFile = (char *) "nfet";
if(getNewOne) return new JFET();
return 0;
}
Element* JFET::info_p(QString& Name, char* &BitmapFile, bool getNewOne)
{
Name = QObject::tr("p-JFET");
BitmapFile = (char *) "pfet";
if(getNewOne) {
JFET* p = new JFET();
p->Props.front()->Value = "pfet";
p->recreate(0);
return p;
}
return 0;
}
void JFET::createSymbol()
{
Lines.append(new qucs::Line(-10,-15,-10, 15,QPen(Qt::darkBlue,3)));
Lines.append(new qucs::Line(-30, 0,-10, 0,QPen(Qt::darkBlue,2)));
Lines.append(new qucs::Line(-10,-10, 0,-10,QPen(Qt::darkBlue,2)));
Lines.append(new qucs::Line( 0,-10, 0,-30,QPen(Qt::darkBlue,2)));
Lines.append(new qucs::Line(-10, 10, 0, 10,QPen(Qt::darkBlue,2)));
Lines.append(new qucs::Line( 0, 10, 0, 30,QPen(Qt::darkBlue,2)));
Lines.append(new qucs::Line( -4, 24, 4, 20,QPen(Qt::darkBlue,2)));
if(Props.front()->Value == "nfet") {
Lines.append(new qucs::Line(-16, -5,-11, 0,QPen(Qt::darkBlue,2)));
Lines.append(new qucs::Line(-16, 5,-11, 0,QPen(Qt::darkBlue,2)));
}
else {
Lines.append(new qucs::Line(-18, 0,-13, -5,QPen(Qt::darkBlue,2)));
Lines.append(new qucs::Line(-18, 0,-13, 5,QPen(Qt::darkBlue,2)));
}
Ports.append(new Port(-30, 0));
Ports.append(new Port( 0,-30));
Ports.append(new Port( 0, 30));
x1 = -30; y1 = -30;
x2 = 4; y2 = 30;
}