Switched capacitor ac simulation and Analog Interview

switched capacitor filter simulation

Hi, all.

I would like to know how to simulate ac response of switched capacitor circuits.

Say, I designed a bandpass filter using switched capacitor circuit technique, then how to simulate with Cadence in order to see the filter's frequency response (i.e., bode plot).

How to get ac response for the circuits involving switches??

What I thought...first thought...um...

Just give one input value...so that it corresponds to the impulse ...so that I can get impulse response in time domain...then, using FFT in Matlab or Cadence...I can get ac response?? Sound too much trouble...and I am not sure..

Want to hear from you guys...^^


Thanks in advance!!!

* Also, If you guys know good interview questions for being an analog designer, please share with me...(links..or anything is welcome..)

Brandon

Hi,
Here is a very good document on how to perform AC simulation on a switched capacitor filter.

https://www.designers-guide.org/Analysis/sc-filters.pdf


Bharath

.pac
.pnoise

spectre