Congratulations Atmasphere!


I noticed today that Ralph Karsten (whom regular and even occasional participants in this forum will of course recognize as the designer and proprietor of Atma-Sphere Music Systems, as well as a uniquely valuable contributor to the forum) was granted United States patent number 10,469,042 on November 5, 2019. It covers an audio amplification technique he had indicated here that he has been developing, which in simple terms appears to me to basically be a clever combination of an analog-to-pulse train converter (as used in traditional class D amplifiers for example, among other audio-related applications), with an output stage employing circlotron topology (analogous to the topology used in his OTL power amplifiers, but utilizing solid state devices).

Link to the Patent.

Congratulations Ralph!!

Best regards,
--Al


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Showing 1 response by audiokinesis

Ralph has a uniquely thorough appreciation and understanding of "what matters to the ear". My mentor Earl Geddes (with Lydia Lee) had a pair of peer-reviewed papers on distortion perception published in the Journal of the Audio Engineering Society. Their findings backed up everything Ralph had been telling me. In fact after writing the papers Earl remarked to me, "now I understand why you and your friends like tube amps".

I think we are extremely fortunate Ralph has chosen to pour himself into designing a switching amplifier that actually works with the characteristics of human hearing instead of against them. We may be about to see switching amps that do not have the traditional drawbacks of switching amps.

Right now I’m really glad I’m a speaker designer instead of an amp designer, because I would hate to compete against what’s coming.

Duke
yeah, I’m also an Atma-Sphere dealer