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From: "Ian Buckner"
Subject: Re: 'Current Dumping' Amplifier Circuits ?
Date: Mon, 2 Dec 2002 11:50:19 -0000
Organization: Agilent Technologies
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"Roger Lascelles" wrote in message
> I think Wirless World (as it was then) ran an article which
> idea. From memory, they showed a high power class B power stage
> of crossover distortion and a lower powered class A (?) stage which
> additional contribution to the output to cancel out the distortion
> Class B. Idea is that a rugged output stage with no thermal runaway
> mediocre linearity can work with a low power fast & clean amp.
> It would be interesting to see if the distortion at low signal
> better than straight class AB designs.
> It may be unnecessary - other high quality audio amps do not use it.
> was building an amplifier, I would not bother. If I chose a Quad
> would be becuase it sounded good and was priced right - not because
> current dumping.
> "HG" wrote in message
> > Any comments on the pro's and con's of 'Current Dumping' circuits
> > by Peter Walker & (I think) Mike Albinson), as used in most Quad
> > amplifiers since the 405?
> > TIA.
As I recall, there were more articles/letters later in WW, eventually
leading to a design that completely cancelled the residual distortion
by choosing values for the sense/add bridge.
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