BiCMOS finding voltage gain question

Discussion in 'Homework Help' started by Digit0001, Mar 23, 2012.

  1. Digit0001

    Thread Starter Member

    Mar 28, 2010
    89
    0
    Hi

    Can someone help me on the following question:
    View attachment question8_BiCMOS.pdf
    for part c in this question i don't understand why my answer does not match.
    Av=-gm1RL*[(R1||rpi2)gm1]/[(R1||rpi2)gm2+1]

    Av=0.5014RL*[74.198]/[75.198]

    Av=37.202877RL/75.198

    P.S
     
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,962
    1,097
    The equation for the voltage gain show in book is a correct answer.
    I get the same answer after solving this

    (0 - Vout)/RL = gm1 * (Vout - Vin) + ( gm2 * ( gm1 * (Vout - Vin) * R1))
     
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