Transfer function of the twin tee notch filter.

Discussion in 'General Electronics Chat' started by vinoddn, Jun 8, 2012.

  1. vinoddn

    Thread Starter New Member

    Jun 7, 2012
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    0
    R1 = R2 = 1/2*pi*fc*C //choose C = 0.1uF
    R3 = R1/2
    K = 1 - (1/4Q) // Q is the quality factor.
    this is the Twin Tee notch filter. ( Twin is because there are two star networks )
    can anyone please give the transfer function of this circuit?
    Thanks
     
  2. Papabravo

    Expert

    Feb 24, 2006
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  3. vinoddn

    Thread Starter New Member

    Jun 7, 2012
    2
    0
    I analyzed the circuit and without opamp im getting the transfer function, but with a positive feedback op-amp, want to know how will the transfer function change?
     
  4. Papabravo

    Expert

    Feb 24, 2006
    10,163
    1,797
    If it is a unity-gain follower with a high frequency rolloff at 10 times the notch frequency there should be a minimal effect.
     
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