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how the number of harmonics in PSS affects PAC simulation?

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sapphire

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Hi,

I want to simulate the supply rejection of my regulator using PAC. The regulator is used to provide a clean "supply" for ring osillators in a PLL. This is only a standalone simulation containing only regulator, oscillators, and some bias circuits.

Since I am only interested in the harmonic index=0 output frequency response, can I set the number of harmonics in PSS simulation to 0? I think noise folding is not the case here, so higher harmonics wont contribute to the PAC accuracy. Please correct me if I am wrong.

Regards,
Sapphire
 

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