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

R_{C}

820 ?

RE1

100 ?

RE2

220 ?

R_{1}

20 k?

R_{2}

5.2 k?

R_{L}

100 k?

C_{1}, C_{3}

10 µF

Figure 1: Question 1
A
Compute the following DC parameters
(i) I_{E}
(ii) V_{E}
(iii) V_{B}
(iv) I_{C}
(v) V_{C}
(vi) V_{CE}
(Hint: Note the voltage divider is not stiff, so do not assume IB is negligible.)
B
Compute the following AC parameters
(i) R_{in}(base)
(ii) R_{in}(tot)
(iii) A_{v}
(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 2
For the self biased JFET circuit in Figure (2), given that ID = 1.2mA, compute:
(a) VDS
(b) VGS
Figure 2: Question 2