ELEC 470, Spring 2004
Prof. Rich Kozick

Homework 3


Date Assigned: Thursday, January 29, 2004
Date Due: Tuesday, Februrary 3, 2004

  1. Reading: Continue studying Chapter 2 on signals and Chapter 3 on linear systems in the Lathi text.

  2. What are reasonable values for R and C if the "envelope detector" circuit shown below is used to demodulate a commercial AM radio station? The carrier frequencies for AM radio stations range from approximately 550 kHz to 1.5 MHz. The "message" signals in AM radio have frequencies less than 5 kHz. Explain your reasoning.

    [CIRCUIT DIAGRAM OMITTED IN HTML VERSION,
    BUT IT IS AVAILABLE ON PAGE 168 OF THE LATHI TEXT.]

Thank you.