asako
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I set up a PLL with verilogA function blocks as described in Mr. Kundert report. Now, PLL converges, but when I plot phase noise using the Matlab code from the report, I saw a huge degradation compared to single VCO or clock simulation result.
Then, I notice that the Mr. Kundert report also shows same effect; VCO's phase noise is -110dB/Hz@100KHz from Spectre RF, however, phase noise calculated in Matlab code is around -40dB/Hz. How should I comprehend this ? Is there any good way to set convergence/accuracy setting ?
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