| Update March 4,
2007 There have been scores of articles on low noise
regulators, harking back to early articles in The Audio Amateur.
Some of these use discrete components for the error amplifier,
others have used the AD797, AD817 and AD825 from Analog
Devices. The purpose of this article is to allow the DIYr a low noise, low
impedance, stable regulator that can be employed to upgrade new
or existing equipment.
The regulators designed by Jung used the LM329DZ voltage
reference -- a low noise and inexpensive TO-92 device. We
found that by paralleling a number of LM329's the reference
noise could be reduced. Feel free to use on or more
LM329's in your application. The
schematic below incorporates some of the improvements cited in
the 2000 Audio Electronics article (LM317 and LM337
Pre-Regulators, pads for compensation capacitors if necessary) and
the circuit boards generally follow the original
designs of Jung and the other associated authors, scaled for
surface mount devices.
On this page we offer a regulator which combines the best of
the above using surface mount technology for compact
design. We have posted the Gerber files so you can feel
free to cut the boards yourself. At present we have no
intent to have boards made. Periodically we collect the
posts from DIYAUDIO, render it into a PDF file and archive it to
this link. Super
Regulator. We also link to Per-Ander Sjostrom's site
as he has produced an elegant regulator using through-hole
technology. P-A's
SITE
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