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.

Switched-capacitor common mode feedback

Status
Not open for further replies.

tia_design

Advanced Member level 4
Joined
Feb 22, 2005
Messages
113
Helped
4
Reputation
8
Reaction score
1
Trophy points
1,298
Activity points
2,217
For folded-cascode op amp with switched-capacitor common mode feedback, how to make the output common mode level within 1mv of supply/2? and for all supply=2, 2.7 and 3.6V?
 

In general, this depends on the gain of the CMFB loop.

To have an error of 1mv out of mid-supply ( 1.5? ), then the gain of the cmfb loop shoulde be >= 1.5/1mV ( roughly )
 

Maybe this depend on your voltage refrence, and your structure of CMFB. The most important thing of CMFB is speed. If the gain is too high ,the speed will drop down.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top