Hi, hope all you guys be fine during this covid time!
I am dealing with PSS/PSP simulation on the LPTV circuit, the circuit works out at 1 GHz for my first running. However, when changing it slightly to 1.1GHz ( to test some properties), the convergence issue (that was quite troublesome to me often in other circuits) appears.
I try looking for some suggested solutions on this page, but it still gets me stuck, such as:
+ change "reltol" to 1e-5 /vabstol = 1e-8/iabstol=1e-15
+ switch between "gear2only" and "traponly"
+ also adjust time step to be smaller (10p)
+ switch between HB and Shooting method
in simulation, I let the number of harmonics equal to 20, and let the simulator itself decides the "tstab" time
my tool version is IC 616.500.14 and MMSIM 14.1
the output log file/input.scs are also included here
very appreciate you for debugging it!
thanks.
community.cadence.com/.../lptv_5F00_bug.rar