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Engineering · Electrical Engineering
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Consider a differential amplifier circuit shown in Figure Q2. The amplifier is biased by a three-transistor current source. The circuit parameters are β-150, VA10 for Q4 and Q5 and VA-100 V for Q1, Q2 and Q3, VBEa,-0.7 V, V-26mV, and common mode voltage gain Acm-0.11 (a) Analyze the amplifier circuit and determine the following (i) The current Ica- (ii) The output voltage (Vo) for input voltages v,--2 V, V2-2 V (ili) The differential voltage gain. (iv) The common-mode rejection ration (CMRR) 5 Marks) [4 Marks] 7 Marks) 4 Marks] (b) Discuss the method used to reduce the distortion due to the nonlinearity of the Bipolar 5 Marks) junction transistors in differential amplifier circuit. +5 V 8.5 kS2 C4 2 k2 2 k2 C2 ei CE2 Figure Q2

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