ECE323 Electronic Circuits Assignment 7

1. Given C = 0.4 mF, L = 10 mH, and R = 330 ohms. For the following, calculate actual frequency (Hz), not angular frequency (radians/sec).
   1. Find the frequency at which the phase shift of the RC circuit is 45 degrees.
   2. Find the frequency at which the phase shift (of the RL circuit is -45 degrees.
   3. Find the resonant frequency (f_r) for an R-(LC) circuit.
   4. Find the bandwidth B = f_r / Q and quality factor Q = R sqrt(C/L). What are the units of Q?

2. Given the following circuit with C = 31.25 nF, R = 2 kW, and L = 500 mH. Find the steady-state (AC) expression for i and v_out if v_g = 64 cos(8000t) V.

   

3. Given the following circuit with C = 0.4 mF, R = 400 W, and L = 40 mH. Find the steady-state (AC) expression for i and v_out if v_g = 750 cos(5000t) mV.

   

4. Given the following circuit with C = -j22 W, R = 24 W, and L = j40 W. Find the Thévenin equivalent circuit with respect to terminals a and b if v_g = 75Ð0° V.

   

Maintained by John Loomis, last updated 9 October 2007