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-   -   Possible to design a high-power class D amp with a low output impedance? (http://www.diyaudio.com/forums/class-d/139116-possible-design-high-power-class-d-amp-low-output-impedance.html)

454Casull 22nd February 2009 10:20 PM

Possible to design a high-power class D amp with a low output impedance?
 
I don't know much about amp design but I was thinking about current drive with class D.

Is it feasible?

Ouroboros 23rd February 2009 08:49 AM

If you want current drive, then the amplifier will have a high (not low) output impedance!

It is possible (and quite easy) to use the self-oscillating 'UCD' technique to provide an amplifier with the NFB derived from the output current, rather than the output voltage.

454Casull 23rd February 2009 07:33 PM

Oops. That's what I meant.


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