Question
Asked Oct 26, 2019
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For an npn transistor, DC collector current IC= 10 mA and DC current gain hFE =120. Find out the value of the collector to base leakage current and the estimated value of the base current.

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Expert Answer

Step 1

The dc collector current for npn transistor can be expressed in the following way:

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> (1) Ic BI+(1+)Ico--- Ig Base Curent Ico = Leakage Current B Current Gain = hF

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Step 2

The ratio of collector currrent to emitter current can be expressed as

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Ic 120 I 1p 121 => a = 0.992 --> (2)

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Step 3

So, the value of the emitter ...

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Ic 10 = 10.08 mA -->(3) 0.992 0.992

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