I wonder how to simulate switch capacitor circuit such as SC filter 's frequency response in ADS , in cadence I can use PSS and PXF , but how can I do it in ADS?Does anyone know it ? Thanks very much!
I wonder how to simulate switch capacitor circuit such as SC filter 's frequency response in ADS , in cadence I can use PSS and PXF , but how can I do it in ADS?Does anyone know it ? Thanks very much!
I don´t know ADS. However, you can do an exact ac analysis (frequency response) with the help of each general purpose simulation program if you replace each s/c unit with a time continuous equivalent (consisting of a positive or negative resistance and a delay unit). If you are interested I can give you some more information and references.
Thanks,LvW
use CT subsitute is a good idea, but unfortunately, we can not get some second order effect such as charge inject or parasite in our simulation , it's not very convenient for performance improve,isn't it?
Yes, I agree with that. Substitution of s/c elements by continuous time units can be recommended when you are interested in the principle and ideal frequency response
(e.g. for tutorial purposes). Parasitic effects are hard to cover.
Thanks khouly
I have tried this before,but still have some problem , when you do FFT with trans sim, you get the output spectrum with center freq and harmonics, so you can only get voltage or power of one point frequency , I wonder if there is some way to get the steady state and do AC sim ?