gwang@ncsa.uiuc.edu (George Wang) (03/24/91)
Hello! I am looking for a MSDOS PC based program that will output waveform diagrams for circuit-level components such as MOS and CMOS... I've found some programs that does output waveforms for LOGIC GATES like NAND, NOR, XOR (Bsquared and Micrologic) but haven't found such a thing for MOSfets.. I do know that PSPICE can do outputs but they don't seems to allow multiple pulse input streams (with different clock freq and phases) and also doesn't seem to vary with time... Does anyone know how to setup SPICE to handle multiple-PULSE input streams and work with the time domain? Thanks George -- George Wang - Networking Development T T National Center for Supercomputing Applications | T | INTERNET: gwang@ncsa.uiuc.edu \_|_/ UUCP: gargoyle!igloo!gwang PH: (217) 244-4020 -
bodoh@cat4.cs.wisc.edu (Daniel Bodoh) (03/25/91)
In article <1991Mar23.213254.28831@ux1.cso.uiuc.edu> gwang@ncsa.uiuc.edu (George Wang) writes: > >I do know that PSPICE can do outputs but they don't seems to allow >multiple pulse input streams (with different clock freq and phases) and >also doesn't seem to vary with time... Does anyone know how to setup >SPICE to handle multiple-PULSE input streams and work with the time >domain? Use a pulse independent source for each input stream... The form is Vxxxxxx N+ N- PULSE(V1 V2 TD TR TF PW PER) where Vxxxx is the name of the voltage source N+ and N- are + and - terminals respectively V1 is the initial value V2 is the pulsed value TD is the time from 0 until the pulse starts rising TR is the rise time TF is the fall time PW is the time the pulse is at V2 PER is TR+PW+TF+time between pulses (period) The do a TRAN analysis... For more info, get the book _Computer-aided_Circuit_Analysis_Using_SPICE_ by Walter Banzhaf, published by Prentice Hall. Although it is a poorly written book IMHO, it does serve as a good reference if you already know spice. There are also many other Spice books out there, any university engineering library should have a host of them. Dan Bodoh