Engineering, 10.11.2020 14:00 dmurdock1973

Q11 Figure Q11 shows an amplifier circuit, where the BJT Qı has the following parameters Is = 10-15 A, B = 100, VA = 100 V. The two MOSFETS, M, and M2, are identical and
have the following parameters: VTHP=-1 V, 1= 0, K = 0.5 mAV-2.
V = 10 V
Vi = 5V
M
M2
Ri
35 kΩ
RREF
RS
WH
100 Ω
Rour
Vs
Vo
Rin
R
100 S2
R
V
Fig. 211
BJT Q1 is known to operate in forward active mode.
(a) Determine the value of RREF to provide a de collector current of 1 mA to BJT Qı
(6 marks)
(6) Determine the value of R2.
(2 marks)
(c) Identify the amplifier configuration,
(1 mark)
(d) Determine the small-signal model parameters of Q1, i. e., gm.91, rap, and ro. pl
(3 marks)
(e) Determine Rin and Rour of the two-port network of the amplifier
(4 marks)
(f) Determine the gain ve/vs of the amplifier
(2 marks)
(g) If the supply voltage V, is reduced to 4 V, discuss the effects on the amplifier circuit
Assume no other changes in the amplifier circuit.
(2 marks)

Q11 Figure Q11 shows an amplifier circuit, where the BJT Qı has the following parameters

Is = 10-

Answers: 1

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Q11 Figure Q11 shows an amplifier circuit, where the BJT Qı has the following parameters Is = 10-15...

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