rfx
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Posts: 11
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I have simulated phase noise of an LC VCO with spectreRF and eldoRF. The steady state oscillation freuency from both simulators (SST and PSS) are quite close(4346.7MHz and 4346.8MHz). However, phase noise results are quite different;
sim\offset freq 10KHz 100KHz 1MHz ---------------------------------------------------------------- spectreRF -75.8 -99.5 -120.2 (dBc/Hz) eldoRF -70.4 -96 -117.2 (dBc/Hz)
I have designed VCOs with eldoRF (4 VCOs) before, and simulated and measured phase noise reults matched within 1-2 dB and also 1/f noise corner were matching quite close.
Device models are from the same design kit, and I have checked accuracy of spectreRF phase noise simuation by changing parameters suggested by spectreRF documentation.
Can anybody help me with this discrepency between PN simulation results? Thanks,
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