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# Chopper Simulation Noise

10 Threads found on edaboard.com: Chopper Simulation Noise

## a question about pss+pnoise simulation in a chopper-aplifier

I try to simulate a chopper instrumentation amplifier. Chopping frequency is 5 KHz and cut-off frequency is 700 Hz. I use pss+pnoise analysis to see the noise spectrum and measure the integrated noise, but it seem to be wrong. Is it necessary to put an ideal ?Sample-and-Hold? circuit in chopper-amplifier (...)

## input referred noise simulation for chopper amplifier

Hi, I am designing chopper amplifier and trying to simulate noise analysis by using PSS and Pnoise. But i am not getting any noise shift in noise plot and also not showing any noise reduction with chopping. I am using chopping frequency=20KHz and input signal frequency=1KHz. I am (...)

## chooper op amp transient and ac simulation

Hi all I am designing a chopper amplifier (picture below). How I can run DC gain and noise ? I need transient to turn on clk and clkb, and I need to run ac (gain vs frequency). Is it correct way to do? I appriciate any idea. Thanks a

## problems about simulate flicker noise of chopper amplifier with PSS & PNOISE

hi all~ From papers I read about chopper stabilization, the flicker noise in the PSD of chopper amplifier should be modulated to odd harmonics of chopping frequency. And I use a simple fully differential op-amp to simulate this function with PSS & Pnoise. The beat frequency is 10kHz. From the simulation (...)

## Interpreting In/out referred noise of chopper amplifier

Hi Everyone, After simulating a chop amp, it seems like looking at the input referred noise, the 1/f noise is moved to the modulation freq (clk freq), but when I look at the output referred noise, I still see 1/f noise at DC level. I thought the 1/f noise should have been modulated up by the demodulator (...)

## chopper stabilized opamp pss simulation problem

from cadence help doc, it is said pss and pnoise can simulate chopper stabilized opamp noise. so I use this to simulate my design. my design has an on-chip osc. but when simulating, the pss function (oscillator) doesn't converge well, it often fails. if I remove the osc circuit, and add an ideal clock, then the pss function works. (...)

## simulation of chopper stabilized amp, help!!

Hi would you mind giving me some simple steps on how to use pss and pnoise simulation for a chopper amplifier? since Im quite lost and at our school we dont have tutorials or cadence help..thank you very much and goodluck for your designs!

## How to simulate noise curve with Hspice?

now i am designing a opamp with chopper stablization,but i donot know how to simulation the noise curve with the hspice, so i cannot decide the chopper frequency,is anybody can tell me?thanks!

## I need help in spect of chopper amp

Hi all, I am working in the design a chopper op-amp.but I can't continue for some question: I have designed a two stage amp with 1M bandwidth ,gain is 72dB,PM 61. -3dB bandwidth is 250Hz.compensation capacitor is 1.1pF.I have choose the chopper frequency at 100kHz or 100Hz.With the two frequencies ,the chopper modulators can't reduce the (...)

## bandgap flicker noise

chopper stabilization ;-) nathan