What is Transition frequency?
The frequency at which the common-emitter current gain falls to 1, written fT. It is a key indicator of a transistor's high-frequency performance.
Field: Bipolar transistors
Transition frequency in the explanations
The frequency at which common-emitter current gain drops to 1 is the transition frequency fT, roughly fT ≈ gm/(2π(Cπ + Cμ)).
What does the transition frequency fT of a bipolar transist…
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Related terms
Current gain (hFE) SiGe (silicon-germanium) Common-emitter circuit Crossover distortion Current mirror Cutoff region Darlington connection Early effect Emitter follower Forward-active region