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Simulators >> RF Simulators >> PSS Simulation Not Converging
https://designers-guide.org/forum/YaBB.pl?num=1513250135

Message started by sarthak on Dec 14^th, 2017, 3:15am

Title: PSS Simulation Not Converging
Post by sarthak on Dec 14^th, 2017, 3:15am

I am trying to run PSS simulation for injection locked oscillator but sometimes I get convergence issues. I tried changing the integration method to gear2 and adding cmin=1f but still getting convergence error.
Could anyone explain the possible reason for it? The beat frequency is 50MHz (same as injection frequency) and oscillator frequency is 5GHz. I am using tstab=100ns.
I am using the following settings for PSS:
start = 100.205 ns
outputstart = 0 s
stop = 120.205 ns
period = 20 ns
maxperiods = 25
steadyratio = 100e-03
step = 120.205 ps
maxstep = 50 ps
ic = all
useprevic = no
skipdc = no
reltol = 100e-06
abstol(V) = 1 uV
abstol(I) = 1 pA
temp = 27 C
tnom = 27 C
tempeffects = all
errpreset = conservative
method = gear2
lteratio = 3.5
relref = sigglobal
cmin = 1 fF
gmin = 1 pS