Question on Sigma Delta Modulator Modeling

Status
Not open for further replies.

gmcfilter

Junior Member level 2
Joined
Jun 2, 2008
Messages
24
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,283
Location
South Korea
Activity points
1,413
HI everybody

Now I'm4th order feedback single bit SDM modeling

In my modeling

sampling frequency 1MHz OSR=125

multipling the OSR 2^N the SNR is increased

but multipling the OSR 3 5.. (not 2^N) SNR id decreased

I don't know what is problem

OSR ration must constant ?? not a floating??
 


how did you multipy OSR?
 

Status
Not open for further replies.
Cookies are required to use this site. You must accept them to continue using the site. Learn more…