How to feedback the class D?

Thread Starter

catherine

Joined May 15, 2007
3
For a Class D PWM audio amplifier (differential stage and power stage), what is the easiest feedback scheme?

Since the output of the power stage is a modulated pulse waveform, where should I feed this into?
 

Distort10n

Joined Dec 25, 2006
429
Well, for first and last questions:

1) Yes, you can but if you neglected to use Rf then you would have unity gain.

4) I think filterless Class D amps ultilize the speaker inductance to help filter rather than using external bulk caps.
 

hgmjr

Joined Jan 28, 2005
9,029
Greetings catherine,

I fixed the link in my earlier reply. The article has some pretty interesting information in it.

hgmjr
 
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