/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: MullerC_sy.java
*
* Copyright (c) 2003 Sun Microsystems and Static Free Software
*
* Electric(tm) 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 3 of the License, or
* (at your option) any later version.
*
* Electric(tm) is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Electric(tm); see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, Mass 02111-1307, USA.
*/
package com.sun.electric.tool.generator.layout.gates;
import com.sun.electric.database.hierarchy.Cell;
import com.sun.electric.database.prototype.PortCharacteristic;
import com.sun.electric.tool.generator.layout.FoldedMos;
import com.sun.electric.tool.generator.layout.FoldedNmos;
import com.sun.electric.tool.generator.layout.FoldedPmos;
import com.sun.electric.tool.generator.layout.FoldsAndWidth;
import com.sun.electric.tool.generator.layout.LayoutLib;
import com.sun.electric.tool.generator.layout.StdCellParams;
import com.sun.electric.tool.generator.layout.TechType;
import com.sun.electric.tool.generator.layout.TrackRouter;
import com.sun.electric.tool.generator.layout.TrackRouterH;
import com.sun.electric.tool.Job;
public class MullerC_sy {
private static final double nmosTop = -9.0;
private static final double pmosBot = 9.0;
private static final double wellOverhangDiff = 6;
private static final double inbY = 4.0;
private static final double inaY = -4.0;
private static final double outHiY = 11.0;
private static final double outLoY = -11.0;
private static void error(boolean pred, String msg) {
Job.error(pred, msg);
}
public static Cell makePart(double sz, StdCellParams stdCell) {
TechType tech = stdCell.getTechType();
sz = stdCell.roundSize(sz);
String nm = "mullerC_sy";
sz = stdCell.checkMinStrength(sz, 1, nm);
double spaceAvail = nmosTop - (stdCell.getCellBot() + wellOverhangDiff);
int nbSeries = 2;
double totWid = sz * 3 * nbSeries;
FoldsAndWidth fwN = stdCell.calcFoldsAndWidth(spaceAvail, totWid, 2);
error(fwN==null, "can't make "+nm+" this small: "+sz);
// p1_p1_sp/2 + p1m1_wid + p1_diff_sp
spaceAvail = stdCell.getCellTop() - wellOverhangDiff - pmosBot;
totWid = sz * 6 * nbSeries;
FoldsAndWidth fwP = stdCell.calcFoldsAndWidth(spaceAvail, totWid, 2);
error(fwP==null, "can't make "+nm+" this small: "+sz);
Cell mull = stdCell.findPart(nm, sz);
if (mull!=null) return mull;
mull = stdCell.newPart(nm, sz);
// leave vertical m1 track for ina
double inaX = 1.5 + 2; // m1_m1_sp/2 + m1_wid/2
LayoutLib.newExport(mull, "ina", PortCharacteristic.IN, tech.m1(),
4, inaX, inaY);
double mosX = inaX + 2 + 3 + 2; // m1_wid/2 + m1_m1_sp + m1_wid/2
double nmosY = nmosTop - fwN.physWid/2;
FoldedMos nmos = new FoldedNmos(mosX, nmosY, fwN.nbFolds, nbSeries,
fwN.gateWid, mull, tech);
double pmosY = pmosBot + fwP.physWid/2;
FoldedMos pmos = new FoldedPmos(mosX, pmosY, fwP.nbFolds, nbSeries,
fwP.gateWid, mull, tech);
double rightDiffX =
StdCellParams.getRightDiffX(nmos, pmos);
// inb m1_wid/2 + m1_m1_sp + m1_wid/2
double inbX = rightDiffX + 2 + 3 + 2;
LayoutLib.newExport(mull, "inb", PortCharacteristic.IN, tech.m1(),
4, inbX, inbY);
// output d m1_wid/2 + m1_m1_sp + m1_wid/2
double outX = inbX + 2 + 3 + 2;
LayoutLib.newExport(mull, "out", PortCharacteristic.OUT, tech.m1(),
4, outX, outLoY);
// create gnd export and connect to MOS source/drains
stdCell.wireVddGnd(nmos, StdCellParams.EVEN, mull);
stdCell.wireVddGnd(pmos, StdCellParams.EVEN, mull);
// connect input ina
TrackRouter ina = new TrackRouterH(tech.m1(), 3, inaY, tech, mull);
ina.connect(mull.findExport("ina"));
for (int i=0; i<nmos.nbGates(); i+=2) {
ina.connect(nmos.getGate(i, 'T'), -1.5);
}
for (int i=0; i<pmos.nbGates(); i+=2) {
ina.connect(pmos.getGate(i, 'B'), -1.5);
}
// connect input inb
TrackRouter inb = new TrackRouterH(tech.m1(), 3, inbY, tech, mull);
inb.connect(mull.findExport("inb"));
for (int i=1; i<pmos.nbGates(); i+=2) {
inb.connect(pmos.getGate(i, 'B'), 1.5);
}
for (int i=1; i<nmos.nbGates(); i+=2) {
inb.connect(nmos.getGate(i, 'T'), 1.5);
}
// connect output outLo
TrackRouter outLo = new TrackRouterH(tech.m2(), 4, outLoY, tech, mull);
outLo.connect(mull.findExport("out"));
for (int i=1; i<nmos.nbSrcDrns(); i+=2) {
outLo.connect(nmos.getSrcDrn(i));
}
// connect output outhi
TrackRouter outHi = new TrackRouterH(tech.m2(), 4, outHiY, tech, mull);
outHi.connect(mull.findExport("out"));
for (int i=1; i<pmos.nbSrcDrns(); i+=2) {
outHi.connect(pmos.getSrcDrn(i));
}
// add wells
double wellMinX = 0;
double wellMaxX = outX + 2 + 1.5; // m1_wid/2 + m1m1_space/2
stdCell.addNmosWell(wellMinX, wellMaxX, mull);
stdCell.addPmosWell(wellMinX, wellMaxX, mull);
// add essential bounds
stdCell.addEssentialBounds(wellMinX, wellMaxX, mull);
// perform Network Consistency Check
stdCell.doNCC(mull, nm+"{sch}");
return mull;
}
}