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Guarantee LC Oscillator Start Up over PVTs

dtzlou

Hi all and Andrew,

I have a question which I think it has been examined thoroughly but I would like to clarify to myself something which is not very clear to me.

The question is:

Which testbench-analysis is most accurate regarding the correctness of starting the oscillator and so satisfying the Barkhausen criteria?

1) Run PSS analysis without any stimulus [such as: a) set initial condition at the differential outputs of the VCO, or b) Power up VCO or c) inserting a time-varying independent source]

and then check the start-up transient behavior using tstab analysis?

OR

2) Run PSS analysis with a stimulus such those that I referred just before?

Thanks , any advice is more than welcome

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