[rec.audio] Lowering power-supply impedances

max@eros.uucp (Max Hauser) (07/29/88)

In article <61833@sun.uucp> klein@sun.UUCP (Mike Klein) writes:
| 
| More important than the ampere-hour rating will be, as for any power source
| you are using, the output impedance.  ...

Well, Mike, you're right, of course; but separating the supply-impedance
issue from the ripple issue is no small accomplishment.  And there are of
course the incidental but possibly vital benefits of not having all of
those 60*N Hertz AC magnetic fields around.

Besides, one can always lower the *DC* output impedance of a supply as well,
very satisfactorily, with a little series regulator.  Common-emitter, of
course (both for low voltage drop and, more important, to place the 
dominant pole at the output, the key to success).

Max Hauser / max@eros.berkeley.edu / ...{!decvax}!ucbvax!eros!max


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