The current gain of a bipolar transistor drops at high frequencies because of____________?
Correct answer: A. Transistor capacitances
- A. Transistor capacitances
- B. High current effects in the base
- C. Parasitic inductive elements
- D. The early effect
Explanation
Internal transistor capacitances, especially base-emitter and base-collector capacitances, increasingly shunt the signal as frequency rises and reduce current gain. The Early effect mainly changes collector current with collector voltage, not the primary high-frequency limitation.
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