Mike A
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Posts: 2
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Hi,
just in case you are still interested and have not found a solution, you may want to check that the simulator is not giving you an 'exceeds BLOWUP limit' kind of warning. This can happen as if you map the phase of the VCO to voltage, this increases of course indefinitely from t=0 at a rate given by your VCO's frequency. Even if the feedback is set correctly, still the absolute value of the voltage may trigger the simulator 'BLOWUP response', thus stopping it.
I had this specific issue, and I solved it in two - consecutive - ways
1 - I changed the BLOWUP limit to a higher value. This worked fine
2 - I did not like the idea of having extremely big numbers and other - important - much smaller numbers as outcomes in my simulation. So I built an ultra simple block in Verilog-A, which is wrapping the phase output to -2Pi to 2Pi
Hope this helps,
Michele
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