Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

CMOS Telescopic Operational amplifier Design

Status
Not open for further replies.
M

mkpriya457

Newbie level 5
Joined
Apr 21, 2013
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,367
I am designing a CMOS telescopic op amp. But i am getting very low CMRR. i.e CMRR below 10.Will it be the problem of the design?
 

Hi,

It could be because of your CMFB if you are using one, or it could be because your design is not optimized. Describe your problem more clearly ...
 

I am getting almost similar common mode and difference mode gain. So I get very low CMRR.
 

As you might know, the common mode gain is expected to be small whereas the differential gain should be high. You can modify your circuit to increase the gain, increase input transistor w/l.
Check this thread.
https://www.edaboard.com/threads/104508/
 
  • Like
Reactions: fikea

    F

    fikea

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top