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Question 1
For the CE amplifier in Figure (1), given the following component parameters:
Parameter
Value
βDC , βAC
150
VBE
0.7 V
VCC
12 V
RC
820 ?
RE1
100 ?
RE2
220 ?
R1
20 k?
R2
5.2 k?
RL
100 k?
C1, C3
10 µF
Figure 1: Question 1
ACompute the following DC parameters(i) IE (ii) VE (iii) VB (iv) IC (v) VC (vi) VCE (Hint: Note the voltage divider is not stiff, so do not assume IB is negligible.)
BCompute the following AC parameters(i) Rin(base) (ii) Rin(tot)(iii) Av(iv) Compute the overall gain Ajv when a signal source with a resistance of 1.6 k? is connected to the amplifier.
C What is the theoretical minimum value for C2 if the amplifier must operate over a frequency range from 1 kHz to 5 kHz?
Question 2For the self biased JFET circuit in Figure (2), given that ID = 1.2mA, compute:(a) VDS (b) VGS
Figure 2: Question 2
Verified Expert
This assignment explains the calculations of DC, AC parameter & minimum emitter capacitor value for the Common Emitter amplifier circuit. It also explains DC parameter calculations for the given self biased JFET circuit.
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