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relationship between sideband and harmonics (Read 3001 times)

jacky lee

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relationship between sideband and harmonics
Dec 08^th, 2005, 11:01pm

In cadence Manual, in pss+pac analysis of mixer,usually number of harmonics in pss analysis is 0 or 1, but index of sideband in follow pac is -25 ,-21
is it correct? because the transfer functin associated with the relative index k results from the small-signal being convolved with the kth harmonic of the steady-state solution.,so the -25,-21
sideband in pac should be results from the small-signal
being convolved with the -25th harmonic of the steady-state solution . but number of harmonics in pss is 1. so ONLY 0 1th harmonic is generated . is result of simulation correct? ???

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Jess Chen

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Posts: 380
California Bay Area

Re: relationship between sideband and �harmonics
Reply #1 - Dec 12^th, 2005, 7:56am

The pss/pac example you referened is used in another part of the SpectreRF User's Guide but with a longer explanation of where the sideband indices come from. Search for mixer_ip3. The mixer_ip3 example is part of the Top Down Behavioral rfLib.

However, to reproduce the published results, the latest code requires that you set the pss highorder option to "yes" and also select conservative options. There is a pcr to make this example work once again with default options.

-Jess

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jacky lee Guest	Re: relationship between sideband and �harmonics Reply #2 - Dec 12^th, 2005, 5:37pm thanks for replying
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