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/ Forums / Believe the Hypex, class-D DIY amplifier
 

  Amplitude modulation? 
 
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Andy Repton Nov 28, 2006, 07:50am EST Reply - Quote - Report Abuse
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Thanks for an interesting article. Useful as I am looking at using the UCD modules for an active speaker project.

I'm a little puzzled by the use of AM radio as an analogy to explain class D though, as an AM modulated signal has an envelope that follows the audio whilst the result of modulation in class D is a signal that is always rail to rail. The audio varies the duty cycle of the output, not its amplitude.

This of course, has no bearing on the sound!

Andy



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