GATE EC 2014 Set 2 — Question 19
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Electronic Devices → BJT → Current Gain Parameters
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Question
An increase in the base recombination of a BJT will increase
Correct answer
(B) the breakdown voltage BV_(CEO)
Solution
1.Base recombination increases the base current required for a given collector current .
2.The common-emitter current gain therefore decreases.
3.The relationship between the collector-emitter breakdown voltage () and the collector-base breakdown voltage () is given by , where is a constant (typically 3 to 6).
4.As decreases, the denominator decreases, leading to an increase in .
5.Therefore, an increase in base recombination increases the breakdown voltage .
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