Andrew Beckett
Senior Fellow
Offline
Life, don't talk to me about Life...
Posts: 1742
Bracknell, UK
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I'm not going to append a "defence" of Spectre, because much of what has been said is not generally correct. It may be correct for specific circumstances (I'm not doubting Panchoo Hideboo's honesty), but is not correct in general. Otherwise all the large numbers of SpectreRF users would be getting incorrect results which don't match with silicon, and that isn't the case. We've got a lot of very vocal customers, and believe me, they tell us! Similarly if the simulator was vastly slower, Cadence would hear about that too.
Quick rebuttal - I don't have the patience to go into all of the points in detail:
I don't think you should need to use oversampling most of the time. maximorder/selectharm is OK providing you use them sensibly. Shooting QPSS is appropriate for appropriate circuits - but large, high frequency, weakly non-linear, multitone simulations is not its strength. 3-tone HB should be OK, but 2-tone HB+PAC should be OK too - again, which is appropriate depends on your needs. Similarly you could use PSS+RapidIP3 - it depends on your needs.
Regards,
Andrew.
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