ece3113_A2009_hw6

ece3113_A2009_hw6 - ECE 3113 Homework 6 ECE 3113...

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ECE 3113 Homework 6 1 ECE 3113 Introduction to RF Circuit Design Homework 6 Due: Tuesday, October 13, 2009 in class. Grading: 100 points, 2.5% of course grade. Solutions must be legible and show all work to receive credit. Reading: Chapter 8, Chapter 9 (pp. 485-510) Note: For some of the problems you may rely on MATLAB or Mathcad. Matching networks 1. [20 pts] Page 481, Problem 8.16. Use 0 50 L Z  . Favor the solution that has uses an open-circuited stub with 4 S l . Biasing networks 2. [20 pts] Compute the resistor values for the following biasing network (similar to the one in the Practically Speaking section of Chapter 8). The npn RF transistor Q 3 is to be biased at 10 mA C I and CE 2V V . For Q 3 , we also know that 3 100 and BE3 0.9 V V . The low-frequency pnp transistors Q 1 and Q 2 are characterized by 1 150 and BE1 0.7 V V  . The collector currents of Q 1 and Q 2 should be approximately equal to achieve the best temperature stability of bias. The power supply voltage is CC 3.6 V V . Use reasonable engineering approximations. R 1 R 3 R 2 Q 1 Q 2 V CC V CC I C Q 3 Power flow in an amplifier
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ece3113_A2009_hw6 - ECE 3113 Homework 6 ECE 3113...

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