Hi Andrew, Thanks for replying. I removed all the relays,except one, and it doesn't converge. However, if I put back the other 2, it converges. :-| But, when using all the 3 sources, the pulse signal at the input of the comparator is distorted (it seems like it was super imposing the sine wave on the square wave. Playing with the "close switch resistance" (set to 1nohm now, which may be too low) changes a lot the signal shape. Please check attached the log file, netlist and a TB screenshot. community.cadence.com/.../TBcomparator_5F00_log.txt community.cadence.com/.../TBcomparator_5F00_netlist.txt No convergence case (Pulse voltage source only ) With the 3 relays, converges but the output waveform (stimuli net) shows a funny shape. Netlist for this case, community.cadence.com/.../TBcomparator_5F00_netlist2.txt I am sorry for the long e-mail. Best regards, Pedro![]()
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