The collector current formula IC = [a / (1 – a )] IB includes the additional term_____________?
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Answer: A. ICEO
Explanation
The equation incorporates the collector-emitter leakage current with the base current multiplied by gain. In common-emitter setups, this specific leakage term accounts for the current flowing with an open base. Without including this leakage term, the calculated collector current would deviate from real measurements. Leakage currents exist in all semiconductor junctions due to minority charge carrier thermal generation. The symbol ICEO specifically denotes the collector-to-emitter current with the base terminal left open. Bipolar junction transistors require careful thermal management to keep leakage currents at minimum levels.
Accurate current equations are critical when designing precision analog integrated circuits operating near limits. Engineers account for leakage currents to prevent thermal runaway in high-power amplifier stages. This parameter helps predict transistor behavior across varying ambient operating temperature ranges. Option B represents ICBO, which is the leakage current associated with the common-base configuration. Option C represents total collector current rather than the specific added leakage term. Option D represents the controlled component of collector current driven directly by the base current.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
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