Alpha cutoff frequency

Alpha cutoff frequency, or $f\_\{\backslash alpha\}$ is the frequency at which the common base DC current gain $\backslash alpha$ 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 $\backslash alpha\; =\; \backslash frac\{i\_C\}\{i\_E\}$.{{Cite web|url=http://www.chegg.com/homework-help/definitions/alpha-cutoff-frequency-4|title=Alpha Cutoff Frequency Definition|website=Chegg Study|access-date=October 1, 2017}}