/********** 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 "isrcdefs.h" #include "ngspice/trandefs.h" #include "ngspice/sperror.h" #include "ngspice/suffix.h" #include "ngspice/1-f-code.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 getisrcval(double, char*); #endif int ISRCload(GENmodel *inModel, CKTcircuit *ckt) /* actually load the current value into the * sparse matrix previously provided */ { ISRCmodel *model = (ISRCmodel *) inModel; ISRCinstance *here; double value; double time; double m; /* loop through all the source models */ for( ; model != NULL; model = model->ISRCnextModel ) { /* loop through all the instances of the model */ for (here = model->ISRCinstances; here != NULL ; here=here->ISRCnextInstance) { m = here->ISRCmValue; if( (ckt->CKTmode & (MODEDCOP | MODEDCTRANCURVE)) && here->ISRCdcGiven ) { /* load using DC value */ #ifdef XSPICE_EXP /* gtri - begin - wbk - modify to process srcFact, etc. for all sources */ value = here->ISRCdcValue; #else value = here->ISRCdcValue * ckt->CKTsrcFact; #endif } else { if(ckt->CKTmode & (MODEDC)) { time = 0; } else { time = ckt->CKTtime; } /* use the transient functions */ switch(here->ISRCfunctionType) { default: #ifdef XSPICE_EXP value = here->ISRCdcValue; #else value = here->ISRCdcValue * ckt->CKTsrcFact; #endif break; case PULSE: { double V1, V2, TD, TR, TF, PW, PER; double basetime = 0; #ifdef XSPICE double PHASE; double phase; double deltat; #endif V1 = here->ISRCcoeffs[0]; V2 = here->ISRCcoeffs[1]; TD = here->ISRCfunctionOrder > 2 ? here->ISRCcoeffs[2] : 0.0; TR = here->ISRCfunctionOrder > 3 && here->ISRCcoeffs[3] != 0.0 ? here->ISRCcoeffs[3] : ckt->CKTstep; TF = here->ISRCfunctionOrder > 4 && here->ISRCcoeffs[4] != 0.0 ? here->ISRCcoeffs[4] : ckt->CKTstep; PW = here->ISRCfunctionOrder > 5 && here->ISRCcoeffs[5] != 0.0 ? here->ISRCcoeffs[5] : ckt->CKTfinalTime; PER = here->ISRCfunctionOrder > 6 && here->ISRCcoeffs[6] != 0.0 ? here->ISRCcoeffs[6] : ckt->CKTfinalTime; /* shift time by delay time TD */ time -= TD; #ifdef XSPICE /* gtri - begin - wbk - add PHASE parameter */ PHASE = here->ISRCfunctionOrder > 7 ? here->ISRCcoeffs[7] : 0.0; /* 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; /* gtri - end - wbk - add PHASE parameter */ #endif 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; /* gtri - begin - wbk - add PHASE parameter */ #ifdef XSPICE double PHASE; double phase; PHASE = here->ISRCfunctionOrder > 5 ? here->ISRCcoeffs[5] : 0.0; /* compute phase in radians */ phase = PHASE * M_PI / 180.0; #endif VO = here->ISRCcoeffs[0]; VA = here->ISRCcoeffs[1]; FREQ = here->ISRCfunctionOrder > 2 && here->ISRCcoeffs[2] != 0.0 ? here->ISRCcoeffs[2] : (1/ckt->CKTfinalTime); TD = here->ISRCfunctionOrder > 3 ? here->ISRCcoeffs[3] : 0.0; THETA = here->ISRCfunctionOrder > 4 ? here->ISRCcoeffs[4] : 0.0; time -= TD; if (time <= 0) { #ifdef XSPICE value = VO + VA * sin(phase); } else { value = VO + VA * sin(FREQ*time * 2.0 * M_PI + phase) * exp(-time*THETA); #else value = VO; } else { value = VO + VA * sin(FREQ * time * 2.0 * M_PI) * exp(-time*THETA); #endif /* gtri - end - wbk - add PHASE parameter */ } } break; case EXP: { double V1, V2, TD1, TD2, TAU1, TAU2; V1 = here->ISRCcoeffs[0]; V2 = here->ISRCcoeffs[1]; TD1 = here->ISRCfunctionOrder > 2 && here->ISRCcoeffs[2] != 0.0 ? here->ISRCcoeffs[2] : ckt->CKTstep; TAU1 = here->ISRCfunctionOrder > 3 && here->ISRCcoeffs[3] != 0.0 ? here->ISRCcoeffs[3] : ckt->CKTstep; TD2 = here->ISRCfunctionOrder > 4 && here->ISRCcoeffs[4] != 0.0 ? here->ISRCcoeffs[4] : TD1 + ckt->CKTstep; TAU2 = here->ISRCfunctionOrder > 5 && here->ISRCcoeffs[5] ? here->ISRCcoeffs[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, FC, MDI, FS; /* gtri - begin - wbk - add PHASE parameters */ #ifdef XSPICE double PHASEC, PHASES; double phasec; double phases; PHASEC = here->ISRCfunctionOrder > 5 ? here->ISRCcoeffs[5] : 0.0; PHASES = here->ISRCfunctionOrder > 6 ? here->ISRCcoeffs[6] : 0.0; /* compute phases in radians */ phasec = PHASEC * M_PI / 180.0; phases = PHASES * M_PI / 180.0; #endif VO = here->ISRCcoeffs[0]; VA = here->ISRCcoeffs[1]; FC = here->ISRCfunctionOrder > 2 && here->ISRCcoeffs[2] ? here->ISRCcoeffs[2] : (1/ckt->CKTfinalTime); MDI = here->ISRCfunctionOrder > 3 ? here->ISRCcoeffs[3] : 0.0; FS = here->ISRCfunctionOrder > 4 && here->ISRCcoeffs[4] ? here->ISRCcoeffs[4] : (1/ckt->CKTfinalTime); #ifdef XSPICE /* compute waveform value */ value = VO + VA * sin((2.0 * M_PI * FC * time + phasec) + MDI * sin(2.0 * M_PI * FS * time + phases)); #else value = VO + VA * sin((2.0 * M_PI * FC * time) + MDI * sin(2.0 * M_PI * FS * time)); #endif /* gtri - end - wbk - add PHASE parameters */ } break; case AM: { double VA, FC, MF, VO, TD; /* gtri - begin - wbk - add PHASE parameters */ #ifdef XSPICE double PHASEC, PHASES; double phasec; double phases; PHASEC = here->ISRCfunctionOrder > 5 ? here->ISRCcoeffs[5] : 0.0; PHASES = here->ISRCfunctionOrder > 6 ? here->ISRCcoeffs[6] : 0.0; /* compute phases in radians */ phasec = PHASEC * M_PI / 180.0; phases = PHASES * M_PI / 180.0; #endif VA = here->ISRCcoeffs[0]; VO = here->ISRCcoeffs[1]; MF = here->ISRCfunctionOrder > 2 && here->ISRCcoeffs[2] ? here->ISRCcoeffs[2] : (1/ckt->CKTfinalTime); FC = here->ISRCfunctionOrder > 3 ? here->ISRCcoeffs[3] : 0.0; TD = here->ISRCfunctionOrder > 4 && here->ISRCcoeffs[4] ? here->ISRCcoeffs[4] : 0.0; time -= TD; if (time <= 0) { value = 0; } else { #ifdef XSPICE /* compute waveform value */ value = VA * (VO + sin(2.0 * M_PI * MF * time + phases )) * sin(2.0 * M_PI * FC * time + phases); #else value = VA * (VO + sin(2.0 * M_PI * MF * time)) * sin(2.0 * M_PI * FC * time); #endif } /* gtri - end - wbk - add PHASE parameters */ } break; case PWL: { int i; if(time < *(here->ISRCcoeffs)) { value = *(here->ISRCcoeffs + 1) ; break; } for(i=0; i < (here->ISRCfunctionOrder / 2) - 1; i++) { if((*(here->ISRCcoeffs+2*i)==time)) { value = *(here->ISRCcoeffs+2*i+1); goto loadDone; } if((*(here->ISRCcoeffs+2*i)ISRCcoeffs+2*(i+1)) >time)) { value = *(here->ISRCcoeffs+2*i+1) + (((time-*(here->ISRCcoeffs+2*i))/ (*(here->ISRCcoeffs+2*(i+1)) - *(here->ISRCcoeffs+2*i))) * (*(here->ISRCcoeffs+2*i+3) - *(here->ISRCcoeffs+2*i+1))); goto loadDone; } } value = *(here->ISRCcoeffs+ here->ISRCfunctionOrder-1) ; break; } /**** tansient noise routines: INoi2 2 0 DC 0 TRNOISE(10n 0.5n 0 0n) : generate gaussian distributed noise rms value, time step, 0 0 INoi1 1 0 DC 0 TRNOISE(0n 0.5n 1 10n) : generate 1/f noise 0, time step, exponent < 2, rms value */ case TRNOISE: { struct trnoise_state *state = here -> ISRCtrnoise_state; double TS = state -> TS; double RTSAM = state->RTSAM; /* reset top (hack for repeated tran commands) */ if (time == 0) state->top = 0; /* no noise */ if(TS == 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 -> ISRCdcGiven) value += here->ISRCdcValue; } break; case TRRANDOM: { struct trrandom_state *state = here -> ISRCtrrandom_state; value = state -> value; /* DC value */ if(here -> ISRCdcGiven) value += here->ISRCdcValue; } break; #ifdef SHARED_MODULE case EXTERNAL: { value = getisrcval(time, here->ISRCname); if(here -> ISRCdcGiven) value += here->ISRCdcValue; } break; #endif } // switch } // else (line 48) loadDone: /* 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 for supply ramping option */ *(ckt->CKTrhs + (here->ISRCposNode)) += m * value; *(ckt->CKTrhs + (here->ISRCnegNode)) -= m * value; /* gtri - end - wbk - modify to process srcFact, etc. for all sources */ #ifdef XSPICE /* gtri - begin - wbk - record value so it can be output if requested */ here->ISRCcurrent = m * value; /* gtri - end - wbk - record value so it can be output if requested */ #endif } // for loop instances } // for loop models return(OK); }