spring 2004 3220 Final Exam

# spring 2004 3220 Final Exam - Name SSN Spring2004...

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Name:_______________________________ Spring 2004 SSN: _______________________________         EE 3220 Final Exam 1. Consider the multistage amplifier below. Find the input impedance, output  impedance and gain of the total circuit.  What is the power consumed by this  multistage amplifier.     All  β  = 100,  r o  = 25 k .   V CC  = 15 volts   V EE  = -15  volts 2. Design a BJT Widlar current source to bias 2 stages.  The current needed for the  first stage is 100 µA and will use a 200   resistor.  The second stage requires 150  µA.   Find the resistors needed for both the reference current and the second  Widlar stage.  The circuit is  powered by bus voltages of V CC  = 10 V and V EE  =  -10 V.  Assume silicon devices with V f  = 0.7 V and  η  = 1. 3.

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spring 2004 3220 Final Exam - Name SSN Spring2004...

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