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Old 30th September 2012, 07:09 PM   #1
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Default Mr. Jung's new shunt regulator!

AudioXpress interviews WJ in the October 2012 issue -- he describes a new shunt regulator with a cascode pair of the DN2540 depletion MOSFETs as the current source, and a PNP (D45H11) used as the shunt element for the positive.

I guess you'll have to buy the issue to see it.
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Old 30th September 2012, 07:33 PM   #2
Nicke is offline Nicke  Sweden
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Quote:
Originally Posted by jackinnj View Post

I guess you'll have to buy the issue to see it.
Or you could visit Walt“s blog and find it
WaltsBlog
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Old 30th September 2012, 09:13 PM   #3
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Here, I thought i was all up to date with my 2nd edition of Audio IC OpAmp Applications (which I purchased at the McGraw Hill bookstore on Ave. Americas sometime in the 1970s)!
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Old 11th October 2012, 04:50 PM   #4
WaltJ is offline WaltJ  United States
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Default That old "new" regulator

Quote:
Originally Posted by jackinnj View Post
AudioXpress interviews WJ in the October 2012 issue -- he describes a new shunt regulator with a cascode pair of the DN2540 depletion MOSFETs as the current source, and a PNP (D45H11) used as the shunt element for the positive.

I guess you'll have to buy the issue to see it.
Hi Jack, and to everyone else interested in that "new" regulator. It isn't really new, rather it is just an application of previously used concepts. The current source with the DN2540's has been used by many, and is simply superb in both DC and AC terms. Data on the performance is on my website.

The regulator proper is simply the "Improved" reg as cited, adapted for a PNP shunt operation.

The basic idea of this was to steer folks towards thinking more of localizing audio dynamic currents, and keeping them isolated from the rectifiers, etc. Thus, I'd encourage everyone to think of it more of an example.

Regards to all.

Walt J
PS: Kudoes to Jack Walton on his very illuminating article on regulator listening tests, in Linear Audio.
PS2: The link to the interview with this "new" reg is here.

Last edited by WaltJ; 11th October 2012 at 04:52 PM.
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Old 11th October 2012, 06:14 PM   #5
rsavas is offline rsavas  Canada
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Yes, a fine book, "Audio OPAMP Applications" from my student days. Thanks for that!!
Bob C. has also talked about local regulation and the benefits, for his "Vinyl Track" Phono Pre-amp. Something that is on my Xmas wish list!!

Cheers
Rick
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Old 3rd December 2014, 07:34 PM   #6
WaltJ is offline WaltJ  United States
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Default Updated link for shunt reg

[QUOTE=WaltJ;3197791]Hi Jack, and to everyone else interested in that "new" regulator. It isn't really new, rather it is just an application of previously used concepts. The current source with the DN2540's has been used by many, and is simply superb in both DC and AC terms. Data on the performance is on my website.

The regulator proper is simply the "Improved" reg as cited, adapted for a PNP shunt operation.

The basic idea of this was to steer folks towards thinking more of localizing audio dynamic currents, and keeping them isolated from the rectifiers, etc. Thus, I'd encourage everyone to think of it more of an example.

Regards to all.

Walt J
PS: Kudoes to Jack Walton on his very illuminating article on regulator listening tests, in Linear Audio.
PS2: The link to the interview with this "new" reg is here (2012).

PS3: Watch this space and the link below for new developments:
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Walt Jung's 'WaltsBlog': http://www.waltjung.org/waltsblog
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