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22nd February 2009, 11:20 PM
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#1 |
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diyAudio Member
Join Date: Jan 2004
Location: Toronto, ON, Canada
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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?
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23rd February 2009, 09:49 AM
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#2 |
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diyAudio Member
Join Date: Dec 2003
Location: Nottingham UK
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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. |
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23rd February 2009, 08:33 PM
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#3 |
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diyAudio Member
Join Date: Jan 2004
Location: Toronto, ON, Canada
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Oops. That's what I meant.
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