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spring 2003 3220 Final Exam

# spring 2003 3220 Final Exam - Name SSN Spring2003...

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Name: _______________________________ Spring 2003 SSN: _________________________             EE 3220 Final Exam 1. Find the bias voltages and currents in the circuit below. 2. Sketch the output for the class B amplifier circuit below.

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3. Consider the differential amp below. Find I o , r n  , and the DC bias point and the DC power  absorbed by all of BJT’s.     All  β  = 100,  r o3  = 25 k . V CC  = 12.7 volts   I o  = _______________________ V EE  = -12.7 volts r n  = _______________________ R C  = 5 k V OUT1  = _____________ R A  =  500  V OUT2  = _____________ R B  = 5 k P Q1  = _______ R E  = 10 k P Q2  = _______ P Q3  = _______
4. Replace the BJT current source with a BJT current mirror that will produce the same  current.  5. A noninverting op-amp is made from an op-amp with A o  = 10 6 .  R 2  = 47 k  and R 1  = 5.6  k .   What kind of amplifier is it? What are the values of the feedback factor  β  and the  closed loop gain A fb ?  If the open loop pole of the op-amp is 5 Hz, what is the bandwidth

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