Numerical Problems on BJT

1. Unit 2: Numerical Problems
on BJT
for
Open Educational Resource
on
Electronic Devices and Circuits (EC201)
by
Dr. Piyush Charan
Assistant Professor
Department of Electronics and Communication Engg.
Integral University, Lucknow
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

2. Simple BJT Problem
❖ Q1. In a certain transistor, 99.6% of the carriers injected into the base cross the
collector-base junction. If the leakage current is 5µA and the collector current is
20mA, calculate: (i). the value of αdc (ii). the emitter current
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Dr. Piyush Charan, Dept. of ECE, integral University,
Lucknow

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Dr. Piyush Charan, Dept. of ECE, integral University,
Lucknow
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4. Numerical on Fixed Bias Circuit
❖ Q2. For the circuit shown in the fig. below calculate IB, IC, VCE, VB, VC and
VBC. Assume VBE=0.7V and β=50.
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Dr. Piyush Charan, Dept. of ECE, integral University,
Lucknow

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Dr. Piyush Charan, Dept. of ECE, integral University,
Lucknow
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6. Thanks!!!
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Dr. Piyush Charan, Dept. of ECE, integral University,
Lucknow
6
Contact:
er.piyush.charan@gmail.com
piyush@iul.ac.in