Design a fourth-order sigma-delta modulator

[shaq]

Dear all,

When I design a fourth-order sigma-delta modulator, what kind of issues should I need to take care?

And, can someone tell me the design-flow of high-order sigma-delta modulator?

Thanks so much!!!!


This circuit which I'll design as shown.

 

[wued]

hehe
opamp dc gain should be larger especially for first stage
and match between error cancel digital filter and analog integrators

 

[shaq]

hehe
opamp dc gain should be larger especially for first stage
and match between error cancel digital filter and analog integrators

How to do the part of error cancellation logic?

Thx for your replying!!!!

 

[bob_lv]

you should do more behavorial level of work

 

[beckchm]

what behavorial level?