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

loop gain \measurement

Status
Not open for further replies.
L

luckypearl25

Member level 2
Joined
Jan 6, 2006
Messages
46
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,618
Has anyone done the 'stb' analysis in Virtuoso or used the cmdmprobe component .I need to measure the vcmfb loop gain of a differential amplifier.
how to go about it
 

you can break the loop at the Vctrl (from CMFB), then add ac to Vctrl, and shut down the differental ac, do ac analysis, then check the CM gain and phase margin of your CM loop, if it is not enough, you can compensate it by add capacitor at the output node (very similar as compensating differential phase margin ).
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top