Differential mode gain two amplifiers

Thread Starter

maverickdv

Joined Nov 27, 2012
2
Hi Guys. I need your help.

In the attached file "amp.jpg" you will see a circuit. Suppose that R4/R3 =R2*(1−ε)/R1.

How to show that the differential mode gain and the common mode are those in the attached figure "re.jpg"?

Thank you so much in advance
 

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Hi
That's too easy ! for one time , consider both inputs as + vin and then solve the circuit and for another time consider one of them as +vin and the other one as - vin and then solve the circuit .
Best Wishes
Goldsmith 110
 
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