my 1st sigma delta modulator simulation

[surz90]

Hi, all..i'm new in Sigma Delta Modulator.
I try to built SDM for my final project.
I simulate for 1st order SDM which can see in attachment.
I simulate it using Circuit Maker.

I need suggestion about it.
And i have question about how to design high order (> 1) SDM.
I read some paper, and for high order SDM you can replace integrator (which is LPF orde 1) with other LPF which is order more than 1.
And the requirement of the LPF is the pole of NTF must in open left s-plane (in continuous) or inside z-plane (in discrete).

This is my understanding. It is alright??
And what kind of type of SDM that i mean??

Thank you so much for your advice!!!!!!!

 

[eeecnn]

Hi ,

I am doing my bachelor thesis on clock jitter effect on audio quality. As audio codec I am using sigma delta modulator. I want to implement at the beginning the first order SDM. What can you suggest me ? I am not expert on Matlab and I have to find solution about it :S ?