// Workers AI · dad joke modeWhat did alpha cutoff frequency say? I'm cut off.

Alpha cutoff frequency, or $f_{\alpha }$ is the frequency at which the common base DC current gain $\alpha$ drops to 0.707 of its low frequency value. The common base DC current gain is the ratio of a transistor's collector current to the transistor's emitter current, or $\alpha ={\frac {i_{C}}{i_{E}}}$.