GATE EC 2014 Set 1 — Question 44
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Electronic Devices → BJT → Small-Signal Parameters
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Question
A BJT is biased in forward active mode. Assume , and reverse saturation current . The transconductance of the BJT (in mA/V) is __________.
Solution
Collector current. In forward-active mode,Transconductance.About the units. The stem asks for in mA/V, which is . The official GATE key, to , is the same quantity expressed in A/V. Both are accepted: a value in – (official, A/V) or in – (the unit stated in the question, mA/V).Answer: A/V mA/V (accepted: 5.7–5.9 or 5700–5900)
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