Electrical Circuit and Electronics (ECE 602S)
Assignment 2, Marks (10)
Question
The output characteristics of a transistor in common-emitter configuration can be
regarded as straight lines connecting the following points
IB =
20 µA
50 µA
80 µA
VCE(V)
1.0
8.0
1.0
8.0
1.0
8.0
IC (mA)
1.2
1.4
3.4
4.2
6.1
8.1
Plot the characteristics and superimpose the load line for a 1 kΩ load, given that
the supply voltage is 9V and the d.c. base bias is 50 μA. The signal input resistance
is 800 Ω. When a peak input current of 30 μA varies sinusoidally about a mean
bias of 50 μA, determine
(a) The quiescent collector current
(b) The current gain
(c) The voltage gain
(d) The power gain