Chopper amplifier testbench using PSS and PNOISE

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jc2

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I am simulating a chopper amplifier using PNOISE and PSS. There is a weird result in my simulations. The output noise of the first stage of the amplifier is LOWER than the input noise. My amplifier is working very well in AC simulations. I do not understand why this is happening. My chopper frequency is 100kHz.

Thank you
 

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