Problem in 3db freq. when using Open time constant method

Discussion in 'General Electronics Chat' started by luckyyum, Jun 18, 2011.

  1. luckyyum

    Thread Starter New Member

    Jun 18, 2011
    1
    0
    It is the problem when i studying Sedra's Electric Circuit.
    In common, 3db freq result in open time constant method
    like
    W=1/(C1R1+C2R2+....)

    but, when dominant pole W1 and W2 are close,
    W=1/√(W1^2+W2^2)

    What is a criterion of close?
    How much?
     
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