Alpha cutoff frequency

Alpha cutoff frequency, or fα is the frequency at which the common base DC current gain α 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 α=iCiE.[1]

## References

1. ↑ "Alpha Cutoff Frequency Definition". http://www.chegg.com/homework-help/definitions/alpha-cutoff-frequency-4.

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