feedback factor & gain boosting technique

[jimito13]

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.

 

[LvW]

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".

 

[jimito13]

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.