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PSS and PNOISE Analysis

I am simulating an Chopper stabilized folded cascode opamp. But I am getting som strange behavior at the output. First I am getting unnecessary zoroes in phase plot when I am doing AC analysis but on other machine circuit is showing proper output.

Second I am getting some convergence issues when I am doing PSS and PNOISE analysis. and When I am resimulating the circuit Then it is showing some different results as compare to previous time out put.

Please Help me if any settings problem is there or something else.

Thanks

Tawna over 12 years ago

Hi Kapiljainwal,
We need more information to be able to assist you.
1. What version of spectre are you using? The command spectre -W will give this info.
2. The problem statement isn't very clear. Please - one issue at a time. Provide exact error messages. Describe clearly the setup you are using, etc.
For questions like this, it may be best to contact Customer Support for assistance.

best regards,
Tawna
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winniewang over 12 years ago

More information please.
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