spring 2004 Final Exam

spring 2004 Final Exam - Name:...

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Unformatted text preview: Name: _______________________________ SSN: ________________ EE 3220 Final Exam 16 1. Find the bias voltages V C and V E and the bias values of I C and V CE for the BJT. V CC = 10 volts V EE = -10 volts R 1 = 50 k R 2 = 10 k R C = 5 k R E = 1 k is not known but it is large. 7.34 figure P7.24 20 2. Sketch the complete frequency response of the BJT circuit below. Label the high and low 3 dB cutoff frequencies. BJT parameters - C = 0, r x = 10, f T = 450 MHz , F = o = 100 V f = 0.7 V, = 1, and r o = . Biasing analysis yields an I C = 1 mA. V CC = 6 volts V EE = -6 volts R 1 = 20 k R 2 = 10 k R C = 5 k R E = 3.3 k C E = 100 F R M = 1 M C M = 4 pF R S = 1 k C S = 2.2 F Figure 9.30 Step 1. Find 1) g m 2) r 3) C Step 2. Draw the low frequency model. Solve for poles. Step 3 Draw the high frequency model. Solve for poles. 10 3. For problem # 2. Assume now that the transverse capacitance is no longer ignored. C = 2 pF. Find...
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spring 2004 Final Exam - Name:...

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