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The small-signal model of common-base transistor configuration is shown in the given figure.
The current source (I) and resistor (R) in the output side are (α is the CB current gain of the transistor)—
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α ie, re 1 – α -
α ie, (1 – α) re 1 – α - (1 – α) i e, (1 – α) re
- α i e, re
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Correct Option: D
IC = α Ie (since the output current is multiplied by gain factor R0 = re of CB configuration) Hence alternative (D) is the correct answer.
