feedback factor & gain boosting technique

Status
Not open for further replies.

jimito13

Advanced Member level 1
Joined
Nov 17, 2008
Messages
464
Helped
130
Reputation
262
Reaction score
113
Trophy points
1,323
Location
Greece
Activity points
4,929
Hello all,

For the choise of the unity gain frequency of the gain boosting amplifiers we have the basic equation :

β*funity,open loop,ota<funity,gain booster<fnon-dominant ota

In case that β is not constant (for example if we have a capacitor in the feedback loop β is a function of s=jω) how do we set it on the above equation?

Thanks in advance.Any helpful answer would be appreciated.
 

jimeece13 said:
Hello all,

For the choise of the unity gain frequency of the gain boosting amplifiers we have the basic equation :
β*funity,open loop,ota<funity,gain booster<fnon-dominant ota
Sorry, but I don't see any "equation".
 

It was a typo!So,the following inequality is what i wanted to say :

β*f1<fx<f2

β-->β(s=jω) is the feedback factor as a function of the complex frequency for my application

f1-->unity gain frequency of the main OTA

f2-->non-dominant pole frequency of the main OTA

fx-->the unity gain frequency of the gain boosting amplifier that i am trying to estimate

Hope,everything much more clear now.I would appreciate any helpful opinion.Thanks in advance.
 

Status
Not open for further replies.
Cookies are required to use this site. You must accept them to continue using the site. Learn more…