Stability of the CSA amplifier

Discussion in 'Analog & Mixed-Signal Design' started by tisheebird, Mar 1, 2017.

  1. tisheebird

    Thread Starter New Member

    Feb 28, 2017
    2
    0
    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..
     
  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    4,166
    1,125
    Maybe you can find an answer here.
     
  3. tisheebird

    Thread Starter New Member

    Feb 28, 2017
    2
    0
    Not really, Can you please try once to make a second order transfer function with damping ratio and Wn (omega n).
    Please help...
     
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