Quote:1) "Fixed-frequency oscillators(with jitter)" model cannot serve as a fundamental tone for PSS analysis (which is also a driving signal for my mixer simulation on LO port).
Correct.
Quote:2) My idea is to drive the LO port of my mixer(passive) with jittered clock, and see its effect at the mixer output in terms of NF for example, which for the obvious reasons cannot be done directly in SpectreRF.
Not in SpectreRF, but it can be done with transient analysis.
Quote:3) You suggested then that i should keep noise/jitter out of the PSS analysis and only apply it during the PNoise analysis. I don't know how it is possible in my scenario.
Correct. The PNoise analysis does this naturally. During PSS all small-signal noise sources are ignored. They only become active during noise analyses. So any noise that is generated by the circuit that provides the LO will naturally be included. If you cannot include the circuitry that generates the LO, you will need to model it and the noise it generates. You can do that with the noise modeling capabilities of Verilog-AMS (white_noise(), flicker_noise() and noise_table()). You may need to include noise modulation in your model, which you can do using the techniques employed in the AM, PM and FM modulators shown on the Verilog-AMS page (
http://www.designers-guide.org/VerilogAMS/functional-blocks/modulators/modulator...).
Quote:What i understand is that jitter analysis option provided in PNoise analysis is for estimating the effect of jitter present at some point in the circuit and not for modeling the certain amount of jitter at some point in the circuit?
Correct.
Quote:So, I cannot use your oscillator model "Fixed-frequency oscillators(with jitter)" in SpectreRF for purpose 2) discussed above and i have to rely on transient simulation for this purpose? Is this correct?
Correct.