10 Threads found on edaboard.com: Chopper Simulation Noise
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 (...)
Analog Circuit Design :: 07-21-2016 04:22 :: ehsan_nazarzadeh :: Replies: 0 :: Views: 414
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 (...)
Analog Circuit Design :: 08-27-2015 10:45 :: rishi_iitkgp :: Replies: 1 :: Views: 730
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
Analog Circuit Design :: 01-30-2014 01:54 :: tompham :: Replies: 2 :: Views: 544
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 (...)
Analog Circuit Design :: 02-28-2011 04:27 :: webbubm :: Replies: 1 :: Views: 1959
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 (...)
Analog Circuit Design :: 07-23-2010 22:16 :: cl254 :: Replies: 3 :: Views: 881
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. (...)
Analog Circuit Design :: 09-01-2007 02:48 :: iamxo :: Replies: 5 :: Views: 1929
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!
Analog Circuit Design :: 03-15-2011 19:50 :: Mary_D :: Replies: 4 :: Views: 2314
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!
Analog Circuit Design :: 01-19-2006 09:33 :: beargebinjie :: Replies: 4 :: Views: 1084
The chopper frequency is usually higher then the corner frequency of your noise simulation. This point is the point where the 1/fnoise intersect with the thermal noise.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 08-11-2004 06:42 :: JiL0 :: Replies: 3 :: Views: 1644
chopper stabilization ;-)
Analog Circuit Design :: 01-20-2004 09:34 :: nathan :: Replies: 9 :: Views: 3384