Differential Amplifier gain

Discussion in 'General Electronics Chat' started by codemastercool, Mar 12, 2012.

  1. codemastercool

    Thread Starter New Member

    Jan 23, 2012
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    0
    I have a question about the gain of a differential amplifier that I'm using in a circuit.

    I've attached a schematic below, I would like to know if my equations are right.

    Diff. mode gain = gm1 ((1/gm1)||(1/gm3)) x (gm7/gm7+gm8)

    Common mode gain = ((gm1/gm3)/1+gm1ro4) x (gm7/gm7+gm8)

    Thanks!
     
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