Class B amplifier

Discussion in 'Homework Help' started by sndpgr, Dec 13, 2007.

  1. sndpgr

    Thread Starter Member

    Jun 22, 2006
    23
    0
    Hi!
    I am having doubts regarding working of a class B mos amplifier.basically dealing with a problem from sedra smith . the question is as follows-

    Vt=1 V for both nmos and pmos
    k=Un*Cox*w/l=200 uA/V^2.
    if the input has 5V peak and frequency of 10 Khz what peak output would you expect?
    'the whole question is in the attachment'

    My doubts-
    Comparing it with a class B BJT amplifier ,the out put will be Vi-Vbe ,with a dead space around the origin of width 2*Vbe.
    Would it be similar for mosfets with Vt replacing Vbe
     
  2. sndpgr

    Thread Starter Member

    Jun 22, 2006
    23
    0
    Is the question unclear???? 47 views no reply!!!
     
  3. farmosh203

    Member

    Nov 26, 2006
    20
    0
    Here's the solution, I don't know how to do it though.
     
  4. sndpgr

    Thread Starter Member

    Jun 22, 2006
    23
    0
    Thank you ! but I already have that ,that book helped me through some tough questions,but I still unable to understand some things,Now that youhave uploaded it I can refer to it .

    The solution says 'With RL=infinity and Vi=5v,Vo will be Vi-Vgs1 'agreed' and then it says Vgs=Vt why?? can't Vgs go above Vt.
     
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