RHP zero cancellation in miller compensated opamp

Status
Not open for further replies.
B

big_fudge98

Member level 2
Joined
Mar 31, 2019
Messages
43
Helped
0
Reputation
0
Reaction score
0
Trophy points
6
Activity points
445
Hi all,

I have designed a subtheshold opamp with UGB = 20 kHz. I calculated the RHP zero to be at 250 kHz. Should I go for RHP zero cancellation by adding a resistance before the compensation capacitor?

In general, when do we go for RHP cancellation?

Thanks.
 

So if the phase margin is greater than 60 without RHP zero cancellation, I am safe, correct?
 

If required for stability of the intended feedback circuit.

- - - Updated - - -

Sufficient phase margin and only single crossing of the 0 dB loop gain line.
 
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…