[sdiy] ot: class d audio amp

[Harry Bissell Jr]

--- Magnus Danielson <cfmd at swipnet.se> wrote:

> You don't want to know what class D is!
> 
> Cheers,
> Magnus

  I have a prototype class D amp... its good
for 875KW (short term peak)...  It switches at 1.2KHz
so its a little noisy but what the heck, its good
enough
for rock and roll...

(actually its a welding control :^)

Class D seems like an 'acceptable' idea for a laptop
computer where the sound is going to be lousy anyway
becaise of the massive 1" speakers...

In a tiny chip it might be quite workable, but scaled
up
to audio amp size, the parasitics are likely to make
the
project quite unworkable. I assume that for a project
to be good for "diy" it should work at least as well
as a commercial unit (or be made entirely from old
radios or something else from the salvage bin - in
that case a little reduction in performance may be
acceptable for novelty reasons)  :^P

H^) harry