How to define and Sigma Delta Converter comparator gain?

[schwang1970]

Hi, ALL
Did anyone know how to define the Sigma Delta converter's comparator gain
and simulation it by Hspice in differential mode?
Thank you!

 

[jowong1]

I think it's the same way u define any other gain...you draw a line that defines the input-output relationship and find the slope of that line.

 

[hn1]

I think after finding the SNR you can find the conversion gain by reducing the noise level in your bandwidth from the signal gain.

 

[Youncen]

ok，if your circuit comparator outputs diff +3.3 or -3.3 for 1 and-1 then ,the gain is 3.3, so when feedback this to dac, you should take account it

on the other hand,in digital would if you see 3.3v for 1 and -3.3v for -1, then 1/3.3 as gain is automatically added

jowong1 didn't say clearly ,but the fact is you say how gainy is ,than you can do how gainy is

so

 

[royayeboodan]

in the comparator circuit,use ac in input and run ac analysis.plot output with bode plot.
this way is same way for amplifier gain.