The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Simulators >> RF Simulators >> relationship between sideband and harmonics
https://designers-guide.org/forum/YaBB.pl?num=1134111672

Message started by jacky lee on Dec 8^th, 2005, 11:01pm

Title: relationship between sideband and harmonics
Post by jacky lee on Dec 8^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? ???

Title: Re: relationship between sideband and harmonics
Post by Jess Chen on 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

Title: Re: relationship between sideband and harmonics
Post by jacky lee on Dec 12^th, 2005, 5:37pm

thanks for replying :)