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dberning
PostPosted: December 13th, 2019, 11:36 am 
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Location: Potomac, MD
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+page

David
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KLH007
PostPosted: December 13th, 2019, 11:48 am 
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Location: Glen Burnie, MD
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.
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brombo
PostPosted: December 13th, 2019, 11:52 am 
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Emotiva is selling a class-D amp -

https://emotiva.com/collections/balance ... -amplifier
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David McGown
PostPosted: December 13th, 2019, 12:08 pm 
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Interesting. A tube Class-D amplifier...or at least a tube circlotron output to a Class D front end.
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SoundMods
PostPosted: December 13th, 2019, 12:16 pm 
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Location: Parkville, Maryland
dberning wrote:
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+page

David


My-my. He did a solid-state version of the ancient G.E. Circlotron. An old wheel with new tires.

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Walt
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David McGown
PostPosted: December 13th, 2019, 12:29 pm 
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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.
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SoundMods
PostPosted: December 13th, 2019, 1:24 pm 
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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.

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tomp
PostPosted: December 13th, 2019, 3:02 pm 
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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
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SoundMods
PostPosted: December 13th, 2019, 3:07 pm 
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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.

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