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https://designers-guide.org/forum/YaBB.pl Simulators >> RF Simulators >> How to simulate mixer and LO together for measuring mixer IP3? https://designers-guide.org/forum/YaBB.pl?num=1239497657 Message started by samiraaa on Apr 11th, 2009, 5:54pm |
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Title: How to simulate mixer and LO together for measuring mixer IP3? Post by samiraaa on Apr 11th, 2009, 5:54pm Hi all how can I measure mixer's IP3 when I have the LO in my circuit. so large signal input for mixer is not an ideal sine wave with desired frequency, it is the output of VCO. That will be great if one tells me how I should set the QPss and PAC simulations in spectra. Thank you |
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Title: Re: How to simulate mixer and LO together for measuring mixer IP3? Post by pancho_hideboo on Apr 11th, 2009, 10:26pm samiraaa wrote on Apr 11th, 2009, 5:54pm:
If so, PAC is not slave analysis for QPSS. Master analysis of PAC is PSS. Slave analysis of QPSS is QPAC not PAC. See http://www.designers-guide.org/Forum/YaBB.pl?num=1227668750 You can do simulation without using autonomous QPSS although it is a simple evaluation and lacking in accuracy. Capture one-period waveform VCO alone or VCO with Mixer as Load using PSS. Use "analogLib/vpwlf" or "analogLib/ppwlf" with frequency scaling in QPSS analysis for IP3 evaluation. Here you can do IP3 evaluation using conventional two-tones-QPSS with QPAC. RF1 and LO are treated as large signal in QPSS. RF2 is treated as small signal in QPAC. Also see http://www.designers-guide.org/Forum/YaBB.pl?num=1238150066 The followings are general notes. - Use correct terminologies. - Warnigns are different from Errors. - ADS is not name of simulator. - There is no tool which name is Cadence. - All gains in Direct Plot of Cadence ADE are "right", "true" and "practical" voltage gain. - MATLAB are different from Simulink. - Learn measurements using actual instruments. Not "EDA Tool Play". |
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