messner
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Hi,
I am simulating a chopper stabilized amplifier for audio. I am using a 2-stage amplifier & the demodulation is done in between the stages. My pnoise analysis shows that the I/P referred flicker noise has been reduced but when I plot the PSD of the wave at the demodulator O/P (I/P of 2nd stage), I see the signal power in the baseband but I don't see any flicker noise power at the chopping frequency. I am using Cadence, Spectre, BSIM3V3. I have the following noise parameters in my transistor model files: NMOS: noimod=2, AF = 0.82, KF = 1.23E-31 PMOS: noimod=2, AF = 1, KF = 1.57E-32 Am I missing something? Thanks!
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