Help me understand the feedback factor

[surno]

Hi.. all~

I don't understand the meaning of feedback factor in physically.

Someone saids feedback factor is ratio of closed loop impedance and total loop impedance(closed loop impedance/total loop impedance).

Why this fomular is induced?

 

[barath_87]

Re: feedback factor

Feedback factor is the amount of o/p fedback to the i/p in the form of current or voltage...

For example in a non-inverting op-amp the feedback factor is R1/(R1+Rf)..
coz the amount of o/p fedback to the i/p of the inverting terminal is the voltage across R1.And op-amp as always try to bring the potential difference between inverting and non- inverting terminal zero...

I would suggest you to read the topic from book coz this is the heart of analog design...