ECE 4760: Homework 2

  1. Draw the lowpass circuit required in Lab 2 to filter the PWM output. Specify R and C to meet the requirements stated in the first paragraph of the Procedure section of the lab writeup.
  2. What is the maximum frequency of sine wave you can generate on the Mega644 using the fastest PWM mode? Assume a hardware clock frequency of 16MHz and that you will change PWM values every PWM cycle. Assume also that you require 8 samples/sinewave cycle to produce a filterable signal.

Copyright Cornell University Jan 2009