1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: AM modulation

  1. Mar 30, 2012 #1
    Hello, we are learning about single balanced and double balanced modulators.
    Apparently single balanced modulators include an information, upper and lower sideband component while double balanced modulators use only the upper and lower sideband components.
    Can someone please tell me why the information component is discarded by double balanced modulators. How is that the information component is not necessary ?

    Thanks for any help.
  2. jcsd
  3. Mar 30, 2012 #2


    User Avatar
    Science Advisor
    Gold Member

    You have it backwards: information is carried in the sidebands, while the carrier, which contains no information, is suppressed in a double balanced mixer.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook