Cut off

Discussion in 'Homework Help' started by kvsingh21, Apr 26, 2008.

  1. kvsingh21

    Thread Starter Active Member

    Apr 15, 2008
    63
    0
    On the bode plot, is it true that the cut off is when the gain value falls to 0.707 of the mid band gain?
    Or is it where the steep fall begins?
     
  2. Audioguru

    AAC Fanatic!

    Dec 20, 2007
    9,454
    910
    The cutoff frequency is where the gain is reduced to 0.707 times its max gain.
    It is also called "the corner frequency". The power in the load is half because the voltage is 0.707 times and the current is also 0.707 times.
     
  3. kvsingh21

    Thread Starter Active Member

    Apr 15, 2008
    63
    0
    Thanks a ton for your help guru for this and the other reply as well.
     
  4. Caveman

    Senior Member

    Apr 15, 2008
    471
    1
    Also, in dB this is commonly called the "-3dB point".
     
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