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ECE3040_Homework7

# ECE3040_Homework7 - -16 A and BF = 135 to simulate the gain...

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ECE 3040B: Homework #7 Due Date: March 23, 2009 Page 1 of 2 G EORGIA I NSTITUTE OF T ECHNOLOGY S CHOOL OF E LECTRICAL AND C OMPUTER E NGINEERING ECE 3040B: Microelectronic Circuits Spring Semester 2009, Homework #7 Homework Due Date: Monday, March 23, 2009 1. Common-Emitter Amplifier with PNP Transistor (30 points): (a) Draw the dc equivalent circuit and (b) find the Q-point for the amplifier circuit on the right. (c) Draw the equivalent circuit used for the ac analysis, assuming all capacitors have infinite value. (d) Redraw the ac equivalent circuit, replacing the transistor with its small signal equivalent. (e) Calculate the transistor parameters g m , r π and r o . (f) Calculate the voltage gain v o /v i . Assume β F = 135 and V CC = 9V, R 1 = 20 k Ω , R 2 = 62 k Ω , R C = 13 k Ω , R E = 3.9 k Ω , R I = 1 k Ω , R 3 = 100 k Ω , V A = . 2. Common-Emitter Amplifier with PNP Transistor (20 points): Verify the results of problem 1 using SPICE. Use IS = 10

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Unformatted text preview: -16 A and BF = 135 to simulate the gain of the amplifier circuit at f = 10 kHz (C 1 = 10 μF, C 2 = 47 μF, C 3 = 10μF). Include a printout of the SPICE circuit with nodal dc voltages/currents. ECE 3040B: Homework #7 Due Date: March 23, 2009 Page 2 of 2 3. Common-Collector Amplifier with NPN BJT (30 points): Calculate the values of I C , I B , I C , V BE , V BC , V CE , g m , r π , r o , and A v if R I = 600 Ω , R 1 = 100 k Ω , R 2 = 100 k Ω , R 3 = 24 k Ω , R E = 4.7 k Ω , R C = 2 k Ω , and V CC = V EE = 15 V. Use β F = 125 and V A = 50 V. 4. Common-Collector Amplifier with NPN BJT (30 points): Verify the results of problem 3 using SPICE. Use IS = 10-16 A and BF = 125 to simulate the gain of the amplifier circuit at f = 10 kHz (C 1 = 10 μF, C 2 = 47 μF, C 3 = 10μF). Include a printout of the SPICE circuit with nodal dc voltages/currents....
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• Fall '07
• HAMBLEN
• Bipolar junction transistor, Electronic amplifier, pnp transistor, amplifier circuit, nodal dc voltages/currents

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ECE3040_Homework7 - -16 A and BF = 135 to simulate the gain...

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