PSS not converge in a receiver simulation.
时间：04-06
整理：3721RD
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Hi there,
Ive built a LNA + Mixer + Lo direct down-conversion receiver. flo = frf = 5.2G. However I met lots of trouble when trying to get IP3 and Noise Figure of total circuit.
Cadence cannot perform pss simulation due to non-convergence. At first it's because we have both driving source and autonomous in one circuit. So I add a small source current into LO so that the entire circuit is not autonomous, and add long tstab (30n). But it still doesn't work.
Any comments?
Ive built a LNA + Mixer + Lo direct down-conversion receiver. flo = frf = 5.2G. However I met lots of trouble when trying to get IP3 and Noise Figure of total circuit.
Cadence cannot perform pss simulation due to non-convergence. At first it's because we have both driving source and autonomous in one circuit. So I add a small source current into LO so that the entire circuit is not autonomous, and add long tstab (30n). But it still doesn't work.
Any comments?
Your LO and RF should be at least several ten Hz different
You can not simulate whole receiver chain with PSS. At least, there is a VCO and its frequency is not know therefore PSS common beat can not be defined.Since the common beat is not defined, PSS will never converge.