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.

 

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.