need help!

Discussion in 'Homework Help' started by gunes, Dec 7, 2006.

  1. gunes

    Thread Starter New Member

    Nov 21, 2006
    8
    0
    If an inverting circuit has a gain of -10 and an input resistance of 15 k'ohms what size is the feedback resistor?
     
  2. Papabravo

    Expert

    Feb 24, 2006
    9,905
    1,723
    Ah...lemme see I knew that when I walked in here. Could it be 150K Ohms?
     
  3. beck

    Member

    Nov 27, 2006
    26
    0
    gain in case of inverting configuration is
    g=-rf/rin
    here,
    gain = -10
    rin =15K
    so,
    rf=150k
     
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