Hello Friends,

I am designing a Charge sensitive amplifier and would like to study about the stability.
we know, A/1+AB where AB is the open loop gain. If AB is equal to -1 then the system will oscillate. How would I know that AB will be equal -1.
A= G sCdRf/ 1+sRf( Cd+Cf)
B= 1+sRfCf/sRfCd...
G= gm1r03/ 1+sC2ro3..

Please can anyone make this into 2nd order standard form to get the value of wn, damping ratio..I tried it several times but can't get it.. Please guide me give the solution..

 

Maybe you can find an answer here.

 

Maybe you can find an answer here.

Not really, Can you please try once to make a second order transfer function with damping ratio and Wn (omega n).
Please help...