Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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

compensation circuit of OTA

Status
Not open for further replies.

r@m$

Junior Member level 3
Joined
Jun 8, 2011
Messages
25
Helped
3
Reputation
6
Reaction score
3
Trophy points
1,283
Activity points
1,439
hi....

I am designing an OTA for low voltage specs.

And in the compensation circuit I am using a resistor and capacitor .

How the values of these components affect the game??

how i need to choose the values for these components??
 

leo_o2

Advanced Member level 4
Joined
Sep 3, 2004
Messages
1,324
Helped
277
Reputation
556
Reaction score
240
Trophy points
1,343
Location
China
Activity points
5,761
Pls decide them by stability simulation.
 

dgnani

Advanced Member level 1
Joined
Jul 25, 2009
Messages
425
Helped
160
Reputation
322
Reaction score
152
Trophy points
1,323
Location
USA
Activity points
4,007
hi....

I am designing an OTA for low voltage specs.

And in the compensation circuit I am using a resistor and capacitor .

How the values of these components affect the game??

how i need to choose the values for these components??
if you are referring to a classical 2-stage opamp (diff-pair+common source output stage), then under some common assumptions (I think the output stage gain has to dominate):
- the compensation resistor has to be equal to 1/gm of the output stage,
- the capacitor can be chosen by sweeping it until the loop gain pole have split enough to ensure stability
 
  • Like
Reactions: r@m$

    r@m$

    points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top