Differential Amplifier gain

Thread Starter

codemastercool

Joined Jan 23, 2012
9
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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