Alpha cutoff frequency explained

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 = (i _{C})/(i _{E}) .^[1]

Notes and References

1. Web site: Alpha Cutoff Frequency Definition. Chegg Study. October 1, 2017.