Push-Pull amplifier, getting input and output impedance.

Discussion in 'Analog & Mixed-Signal Design' started by xavierx, Jun 8, 2018.

  1. xavierx

    Thread Starter New Member

    Jun 8, 2018
    2
    0
    Hi, I am designing an amplifier and trying to get equations for Av, Rin, Rout, and BW. (Input would be out2 and output out3) I am confused on how to get them since the Q14, Q15, and Q16 make all together a topology I haven't solved before.
    Could anyone one help me on how to solve it?
    For the output impedance what I did and not sure if I am right is:
    Rout: (re12||re13)+((ro10||ro11)||Rout2)/(Beta+1)
    Where Rout is (ro8||ro9).

    This is the only thing I have come out with after many hours of working on it.
    output.png
    circuito.png
     
  2. ericgibbs

    Moderator

    Jan 29, 2010
    4,689
    905
    hi xavier,
    Welcome to AAC.
    Is this a Homework or College assignment.?
    E
     
  3. xavierx

    Thread Starter New Member

    Jun 8, 2018
    2
    0
    Hi, it was until I decided to change the output. I had to design it with Darlington configuration, but Now I want to try this option since I have read its more suitable for driving current loads. I may want to try amplifying some signals or audio after this.
     
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