Differential mode gain two amplifiers

Discussion in 'Homework Help' started by maverickdv, Nov 28, 2012.

  1. maverickdv

    Thread Starter New Member

    Nov 27, 2012
    2
    0
    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
     
    • amp.JPG
      amp.JPG
      File size:
      13.8 KB
      Views:
      25
    • re.JPG
      re.JPG
      File size:
      14.5 KB
      Views:
      23
  2. Goldsmith110

    New Member

    Apr 9, 2012
    5
    0
    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
     
Loading...