CMOS Analog Circuit Help

Discussion in 'General Electronics Chat' started by gizmoduck, Dec 14, 2007.

  1. gizmoduck

    Thread Starter New Member

    Dec 14, 2007
    1
    0
    My first time posting, though I browse the forum occasionally...

    I have an analog circuit attached as a .jpg file. I need to find the input impedance, but really have no idea where to start. If anyone could give me some pointers I would appreciate it, thanks.
     
    • hw.jpg
      hw.jpg
      File size:
      62.5 KB
      Views:
      33
  2. gootee

    Senior Member

    Apr 24, 2007
    447
    50
    The impedance would simply be the voltage across the i(in) current source divided by i(in). Define v(in) to be the voltage across i(in) and the impedance is v(in)/i(in). So all you need to do is come up with an expression for v(in).

    - Tom Gootee

    http://www.fullnet.com/~tomg/index.html
     
Loading...