Frequency Domain Concepts

• signals are seen as combination of sine waves at different frequencies

• signal spectrum:

  range of frequencies that a signal contains
  
  eg. from f1=> 5*f1

• bandwidth:

  width of the spectrum, eg. 5f1 - f1 = 4f1
  

freq

time

f1 = 1/t1

t1

Example of a TD Graph Example of a FD Graph

Voltage

varies

with

time

Power

(watts)

Varies

with

frequency

f2 = 1/t2

Previous slide

Next slide

Back to first slide

View graphic version