Unity-Gain Bandwidth (BcL) formula?

Discussion in 'General Electronics Chat' started by antseezee, Mar 19, 2007.

  1. antseezee

    Thread Starter Active Member

    Sep 16, 2006
    I'm working ahead in an Op Amps design course. I have a question though. For ANY case or design of an Op Amp, the Unity-Gain Bandwidth (BcL) can be defined as:

    BcL= (B / Kn)

    B = Unity-Gain Frequency
    Kn = Noise Gain

    Is this true in ALL cases?

    I've been trying to find the formula via google, and most sources have said:

    BcL = (B / Ao)

    AoL = Open-Loop Gain

    As for the e-book on the site, I couldn't quite find this exact phrase in terms of an equation. I understand the theory portion of it, but I'm trying to find a general formula that I can apply to any op amp circuit. Thanks.
  2. Distort10n

    Active Member

    Dec 25, 2006
    Well, I confess. I have no idea. Since I am a peon, unity gain bandwidth is the frequency at which the open-loop curve intersects 0dB.