Amplifier HW problem

Discussion in 'Homework Help' started by sdonke002, Dec 2, 2010.

  1. sdonke002

    Thread Starter New Member

    Oct 12, 2010
    An amplifier is tested to have a mid-frequency gain of 37db.It is determined that at a frequency of 120KHz, the gain drops down 12dB from its mid freq value. If Vin=5mVp-p, find Vo at a frequency of 120KHz.

    I have looked all over this forum as well as all throughout my book. Does anyone know how to do this? Thank you in advance!!
  2. shteii01

    AAC Fanatic!

    Feb 19, 2010
    Gain(in decibels)=20*log(Vout/Vin)

    When frequency is 120 kHz, the Gain(in decibels)=37-12=25 dB.
    The Vin is known, Vin=5 mVp-p

    You now have equation where there is only one unknown. Go solve the equation.
    tyblu likes this.