In cadence, how to add clock signal in oscillator circuit and do the simulation?

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diego.fan

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Hi, all

I wanna add a clock signal using "vpulse" in vco circuit. When I run 'pss'. It will show this error.


It seems oscillators circuit cannot work together with clock signal.

Do you know how to fix it? Thanks
 

VCO's frequency never will be in phase with your clock's fundamental frequency. It is natural I think it can't find a soulution. Use simple transient to check step response, use DFT to see the spectrum. You can use pss to see its output distortion on a fix input voltage but that is all.
 

If you have placed this Vpulse source to trig the VCO, it won't work.You should use Vpwl source to excite the VCO.
 

Thanks! May I ask where to find the detailed help document of semi-autonomous QPSS analysis?
 

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