BJT circuit

Discussion in 'Homework Help' started by vustudent, Jun 25, 2010.

  1. vustudent

    Thread Starter Active Member

    Mar 11, 2009
    I have a BJT circuit below:

    The question asks to find the value of C1 for full compensation

    For the transistor, hFE = 60, rb'e = 1200 ohm, Ci= 100pf, VBE = 0.7V Vsat = 0.2V Vi = 6V

    The book's answer:
    compensation is full when (Rb C1) = (rb'e Ci)
    (1K C1) = (1200 100p)

    My question is what is full compensation ? and how do u come up with that condition?
    Last edited: Jun 25, 2010