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发表于 2018-11-30 13:46:26
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Maybe the pss maxacfreq need increasing.
Virtuoso Spectre Circuit Simulator and Accelerated Parallel Simulator RF Analysis User Guide
Maxacfreq (Shooting Only)
If maximum sideband in pac, pnoise, pxf, or psp is set larger than 40, then the pss option
maxacfreq needs to be set to the pss beat frequency times the largest maximum sideband
number in the small-signal analyses. For example, if pac has 20 for maximum sidebands,
pnoise has 70, pxf has 10, and psp has 50, then maxacfreq needs to be set to the pss
frequency times 70.
Spectre may issue a warning at the beginning of the small-signal analysis like the following
one from pnoise if maxacfreq is not set and more than 40 sidebands are specified. If you see this warning in a small-signal analysis, set the pss option maxacfreq to the pss beat
frequency times the number of sidebands used in the small-signal analysis. |
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