/********** Copyright 1990 Regents of the University of California. All rights reserved. Author: 1985 Thomas L. Quarles Modified: 2000 AlansFixes **********/ #include "ngspice/ngspice.h" #include "ngspice/cktdefs.h" #include "vsrcdefs.h" #include "ngspice/trandefs.h" #include "ngspice/sperror.h" #include "ngspice/suffix.h" #include "ngspice/1-f-code.h" #include "ngspice/compatmode.h" #ifdef XSPICE_EXP /* gtri - begin - wbk - modify for supply ramping option */ #include "ngspice/cmproto.h" /* gtri - end - wbk - modify for supply ramping option */ #endif #ifdef SHARED_MODULE extern double getvsrcval(double, char*); #endif int VSRCload(GENmodel *inModel, CKTcircuit *ckt) /* actually load the current value into the * sparse matrix previously provided */ { VSRCmodel *model = (VSRCmodel *) inModel; VSRCinstance *here; double time; double value = 0.0; /* loop through all the source models */ for( ; model != NULL; model = VSRCnextModel(model)) { /* loop through all the instances of the model */ for (here = VSRCinstances(model); here != NULL ; here=VSRCnextInstance(here)) { #ifndef RFSPICE *(here->VSRCposIbrPtr) += 1.0; *(here->VSRCnegIbrPtr) -= 1.0; *(here->VSRCibrPosPtr) += 1.0; *(here->VSRCibrNegPtr) -= 1.0; #else if (here->VSRCisPort) { // here->VSRCcurrent = (*(ckt->CKTrhs[Old] + (here->VSRCbranch)) *(here->VSRCposIbrPtr) += 1.0; *(here->VSRCnegIbrPtr) -= 1.0; *(here->VSRCibrPosPtr) += 1.0; *(here->VSRCibrNegPtr) -= 1.0; double g0 = here->VSRCportY0; *(here->VSRCposPosPtr) += g0; *(here->VSRCnegNegPtr) += g0; *(here->VSRCposNegPtr) -= g0; *(here->VSRCnegPosPtr) -= g0; } else { *(here->VSRCposIbrPtr) += 1.0; *(here->VSRCnegIbrPtr) -= 1.0; *(here->VSRCibrPosPtr) += 1.0; *(here->VSRCibrNegPtr) -= 1.0; } #endif if( (ckt->CKTmode & (MODEDCOP | MODEDCTRANCURVE)) && here->VSRCdcGiven ) { /* load using DC value */ #ifdef XSPICE_EXP /* gtri - begin - wbk - modify to process srcFact, etc. for all sources */ value = here->VSRCdcValue; #else value = here->VSRCdcValue * ckt->CKTsrcFact; #endif } else { if(ckt->CKTmode & (MODEDC)) { time = 0; } else { time = ckt->CKTtime; } /* use the transient functions */ switch(here->VSRCfunctionType) { default: value = here->VSRCdcValue; break; case PULSE: { double V1, V2, TD, TR, TF, PW, PER; double basetime = 0; double PHASE; double phase; double deltat; double tmax = 1e99; V1 = here->VSRCcoeffs[0]; V2 = here->VSRCcoeffs[1]; TD = here->VSRCfunctionOrder > 2 ? here->VSRCcoeffs[2] : 0.0; TR = here->VSRCfunctionOrder > 3 && here->VSRCcoeffs[3] != 0.0 ? here->VSRCcoeffs[3] : ckt->CKTstep; TF = here->VSRCfunctionOrder > 4 && here->VSRCcoeffs[4] != 0.0 ? here->VSRCcoeffs[4] : ckt->CKTstep; PW = here->VSRCfunctionOrder > 5 && here->VSRCcoeffs[5] != 0.0 ? here->VSRCcoeffs[5] : ckt->CKTfinalTime; PER = here->VSRCfunctionOrder > 6 && here->VSRCcoeffs[6] != 0.0 ? here->VSRCcoeffs[6] : ckt->CKTfinalTime; /* shift time by delay time TD */ time -= TD; PHASE = here->VSRCfunctionOrder > 7 ? here->VSRCcoeffs[7] : 0.0; if (newcompat.xs) { /* 7th parameter is PHASE */ /* normalize phase to cycles */ phase = PHASE / 360.0; phase = fmod(phase, 1.0); deltat = phase * PER; while (deltat > 0) deltat -= PER; /* shift time by pase (neg. for pos. phase value) */ time += deltat; } else if (PHASE > 0.0) { /* 7th parameter is number of pulses */ tmax = PHASE * PER; } if (!newcompat.xs && time > tmax) { value = V1; } else { if (time > PER) { /* repeating signal - figure out where we are */ /* in period */ basetime = PER * floor(time / PER); time -= basetime; } if (time <= 0 || time >= TR + PW + TF) { value = V1; } else if (time >= TR && time <= TR + PW) { value = V2; } else if (time > 0 && time < TR) { value = V1 + (V2 - V1) * (time) / TR; } else { /* time > TR + PW && < TR + PW + TF */ value = V2 + (V1 - V2) * (time - (TR + PW)) / TF; } } } break; case SINE: { double VO, VA, FREQ, TD, THETA; double PHASE; double phase; PHASE = here->VSRCfunctionOrder > 5 ? here->VSRCcoeffs[5] : 0.0; /* compute phase in radians */ phase = PHASE * M_PI / 180.0; VO = here->VSRCcoeffs[0]; VA = here->VSRCcoeffs[1]; FREQ = here->VSRCfunctionOrder > 2 && here->VSRCcoeffs[2] != 0.0 ? here->VSRCcoeffs[2] : (1/ckt->CKTfinalTime); TD = here->VSRCfunctionOrder > 3 ? here->VSRCcoeffs[3] : 0.0; THETA = here->VSRCfunctionOrder > 4 ? here->VSRCcoeffs[4] : 0.0; time -= TD; if (time <= 0) { value = VO + VA * sin(phase); } else { value = VO + VA * sin(FREQ*time * 2.0 * M_PI + phase) * exp(-time*THETA); } } break; case EXP: { double V1, V2, TD1, TD2, TAU1, TAU2; V1 = here->VSRCcoeffs[0]; V2 = here->VSRCcoeffs[1]; TD1 = here->VSRCfunctionOrder > 2 && here->VSRCcoeffs[2] != 0.0 ? here->VSRCcoeffs[2] : ckt->CKTstep; TAU1 = here->VSRCfunctionOrder > 3 && here->VSRCcoeffs[3] != 0.0 ? here->VSRCcoeffs[3] : ckt->CKTstep; TD2 = here->VSRCfunctionOrder > 4 && here->VSRCcoeffs[4] != 0.0 ? here->VSRCcoeffs[4] : TD1 + ckt->CKTstep; TAU2 = here->VSRCfunctionOrder > 5 && here->VSRCcoeffs[5] ? here->VSRCcoeffs[5] : ckt->CKTstep; if(time <= TD1) { value = V1; } else if (time <= TD2) { value = V1 + (V2-V1)*(1-exp(-(time-TD1)/TAU1)); } else { value = V1 + (V2-V1)*(1-exp(-(time-TD1)/TAU1)) + (V1-V2)*(1-exp(-(time-TD2)/TAU2)) ; } } break; case SFFM: { double VO, VA, FM, MDI, FC, TD, PHASEM, PHASEC; double phasec; double phasem; static bool warn1 = FALSE, warn2 = FALSE; VO = here->VSRCcoeffs[0]; VA = here->VSRCcoeffs[1]; FM = here->VSRCfunctionOrder > 2 ? here->VSRCcoeffs[2] : (5./ckt->CKTfinalTime); MDI = here->VSRCfunctionOrder > 3 ? here->VSRCcoeffs[3] : 90.0; /* 0.9 * FC / FM */ FC = here->VSRCfunctionOrder > 4 && here->VSRCcoeffs[4] /* test if not 0 */ ? here->VSRCcoeffs[4] : (500./ckt->CKTfinalTime); TD = here->VSRCfunctionOrder > 5 ? here->VSRCcoeffs[5] : 0; PHASEM = here->VSRCfunctionOrder > 6 ? here->VSRCcoeffs[6] : 0.0; PHASEC = here->VSRCfunctionOrder > 7 ? here->VSRCcoeffs[7] : 0.0; /* compute phases in radians */ phasec = PHASEC * M_PI / 180.0; phasem = PHASEM * M_PI / 180.0; /* limit the modulation index */ if (MDI > FC / FM) { MDI = FC / FM; if (!warn1){ fprintf(stderr, "Warning: MDI in %s limited to FC/FM\n", here->gen.GENname); warn1 = TRUE; } } else if (MDI < 0) { MDI = 0; if (!warn2) { fprintf(stderr, "Warning: MDI in %s set to 0\n", here->gen.GENname); warn2 = TRUE; } } time -= TD; if (time <= 0) { value = 0; } else { /* compute waveform value */ value = VO + VA * sin((2.0 * M_PI * FC * time + phasec) + MDI * sin(2.0 * M_PI * FM * time + phasem)); } } break; case AM: { double VO, VMO, VMA, FM, FC, TD, PHASEM, PHASEC; double phasem, phasec; VO = here->VSRCcoeffs[0]; VMO = here->VSRCcoeffs[1]; VMA = here->VSRCfunctionOrder > 2 ? here->VSRCcoeffs[2] : 1.; FM = here->VSRCfunctionOrder > 3 ? here->VSRCcoeffs[3] : (5. / ckt->CKTfinalTime); FC = here->VSRCfunctionOrder > 4 ? here->VSRCcoeffs[4] : (500. / ckt->CKTfinalTime); TD = here->VSRCfunctionOrder > 5 ? here->VSRCcoeffs[5] : 0.0; PHASEM = here->VSRCfunctionOrder > 6 ? here->VSRCcoeffs[6] : 0.0; PHASEC = here->VSRCfunctionOrder > 7 ? here->VSRCcoeffs[7] : 0.0; /* compute phases in radians */ phasec = PHASEC * M_PI / 180.0; phasem = PHASEM * M_PI / 180.0; time -= TD; if (time <= 0) { value = 0; } else { /* compute waveform value */ value = VO + (VMO + VMA * sin(2.0 * M_PI * FM * time + phasem)) * sin(2.0 * M_PI * FC * time + phasec); } } break; case PWL: { int i; double end_time, itime; time -= here->VSRCrdelay; if (time <= here->VSRCcoeffs[0]) { value = here->VSRCcoeffs[1]; break; } end_time = here->VSRCcoeffs[here->VSRCfunctionOrder - 2]; if (time > end_time) { double period; if (here->VSRCrGiven) { /* Repeating. */ period = end_time - here->VSRCcoeffs[here->VSRCrBreakpt]; time -= here->VSRCcoeffs[here->VSRCrBreakpt]; time -= period * floor(time / period); time += here->VSRCcoeffs[here->VSRCrBreakpt]; } else { value = here->VSRCcoeffs[here->VSRCfunctionOrder - 1]; break; } } for (i = 2; i < here->VSRCfunctionOrder; i += 2) { itime = here->VSRCcoeffs[i]; if (itime >= time) { time -= here->VSRCcoeffs[i - 2]; time /= here->VSRCcoeffs[i] - here->VSRCcoeffs[i - 2]; value = here->VSRCcoeffs[i - 1]; value += time * ( here->VSRCcoeffs[i + 1] - here->VSRCcoeffs[i - 1]); break; } } break; } /**** tansient noise routines: VNoi2 2 0 DC 0 TRNOISE(10n 0.5n 0 0n) : generate gaussian distributed noise rms value, time step, 0 0 VNoi1 1 0 DC 0 TRNOISE(0n 0.5n 1 10n) : generate 1/f noise 0, time step, exponent < 2, rms value VNoi3 3 0 DC 0 TRNOISE(0 0 0 0 15m 22u 50u) : generate RTS noise 0 0 0 0, amplitude, capture time, emission time */ case TRNOISE: { struct trnoise_state *state = here -> VSRCtrnoise_state; double TS = state -> TS; double RTSAM = state->RTSAM; /* reset top (hack for repeated tran commands) when there is the jump from time=0 to time>0 */ if (time == 0.0) state->timezero = TRUE; else if (state->timezero) { state->top = 0; state->timezero = FALSE; } /* no noise or time == 0 */ if(TS == 0.0 || time == 0.0) { value = 0.0; } else { /* 1/f and white noise */ size_t n1 = (size_t) floor(time / TS); double V1 = trnoise_state_get(state, ckt, n1); double V2 = trnoise_state_get(state, ckt, n1+1); value = V1 + (V2 - V1) * (time / TS - (double)n1); } /* RTS noise */ if (RTSAM > 0) { double RTScapTime = state->RTScapTime; if (time >= RTScapTime) value += RTSAM; } /* DC value */ if(here -> VSRCdcGiven) value += here->VSRCdcValue; } break; case TRRANDOM: { struct trrandom_state *state = here -> VSRCtrrandom_state; value = state -> value; /* DC value */ if(here -> VSRCdcGiven) value += here->VSRCdcValue; } break; #ifdef SHARED_MODULE case EXTERNAL: { value = getvsrcval(time, here->VSRCname); if(here -> VSRCdcGiven) value += here->VSRCdcValue; } break; #endif #ifdef RFSPICE case PORT: { value += here->VSRCVAmplitude * cos(time * here->VSRC2pifreq); } #endif } // switch } // else (line 48) /* gtri - begin - wbk - modify for supply ramping option */ #ifdef XSPICE_EXP value *= ckt->CKTsrcFact; value *= cm_analog_ramp_factor(); #else if (ckt->CKTmode & MODETRANOP) value *= ckt->CKTsrcFact; #endif /* gtri - end - wbk - modify to process srcFact, etc. for all sources */ /* load the new voltage value into the matrix */ *(ckt->CKTrhs + (here->VSRCbranch)) += value; } // for loop instances } // for loop models return(OK); }