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Patent issued for Ralph Karsten Class D amp
Posted: December 13th, 2019, 11:36 am
by dberning
Ralph Karsten of Atma-Sphere fame was issued a US patent on a Class D amp. The times, they are a changin!
https://pdfpiw.uspto.gov/.piw?Docid=104 ... first+pageDavid
Re: Patent issued for Ralph Karsten Class D amp
Posted: December 13th, 2019, 11:48 am
by KLH007
Ralph has been posting about his developments in Class D on Agon for a while, his new amp could make a big splash in Class D performance.
Re: Patent issued for Ralph Karsten Class D amp
Posted: December 13th, 2019, 11:52 am
by brombo
Re: Patent issued for Ralph Karsten Class D amp
Posted: December 13th, 2019, 12:08 pm
by David McGown
Interesting. A tube Class-D amplifier...or at least a tube circlotron output to a Class D front end.
Re: Patent issued for Ralph Karsten Class D amp
Posted: December 13th, 2019, 12:16 pm
by SoundMods
My-my. He did a solid-state version of the ancient G.E. Circlotron. An old wheel with new tires.
Re: Patent issued for Ralph Karsten Class D amp
Posted: December 13th, 2019, 12:29 pm
by David McGown
I believe the Patent application states the Circlotron can use either solid state devices or tubes. I don't see the circlotron as being the main element, but what is in front of it, or the whole as a combination. Not sure the circlotron output itself is patentable.
David M.
Re: Patent issued for Ralph Karsten Class D amp
Posted: December 13th, 2019, 1:24 pm
by SoundMods
David McGown wrote:I believe the Patent application states the Circlotron can use either solid state devices or tubes. I don't see the circlotron as being the main element, but what is in front of it, or the whole as a combination. Not sure the circlotron output itself is patentable.
David M.
I find the patent process questionable. I've seen patents over the years that should not have been granted. Basically "old wheels" with new names.
Re: Patent issued for Ralph Karsten Class D amp
Posted: December 13th, 2019, 3:02 pm
by tomp
When loking at innovation in amplifier technology the grand daddy of them all is Gerald Stanley who worked at Crown for over 50 years. He has over 45 patents. I met him twice at Crown in Indiana and he is not only a genius but also a nice guy who spent loads of time with me explaining amplifier concepts. One of his inventions, the Class I interleaved class D configuration has many advantages over standard class D. I had a paper on it once but can't find it. Here is a link to some very basic info about it on the Crown site.
https://www.crownaudio.com/en/technology
Re: Patent issued for Ralph Karsten Class D amp
Posted: December 13th, 2019, 3:07 pm
by SoundMods
tomp wrote:When loking at innovation in amplifier technology the grand daddy of them all is Gerald Stanley who worked at Crown for over 50 years. He has over 45 patents. I met him twice at Crown in Indiana and he is not only a genius but also a nice guy who spent loads of time with me explaining amplifier concepts. One of his inventions, the Class I interleaved class D configuration has many advantages over standard class D. I had a paper on it once but can't find it. Here is a link to some very basic info about it on the Crown site.
https://www.crownaudio.com/en/technology
Like I said.