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 2 responses by timlub

You guys know that I've been a speaker builder for many years.  Through my struggles in the amp forums here,  the past couple of years, I have built modified and repaired several amps to improve my knowledge.  My studies on circlotron started with Jim Bongiorno and the old Sumo Nine.  I have a highly modified Nine which is very good.  Then looked at how circlotron worked in tubes and how it was modified to work OTL.  
So,  If I understand what Al has written,  Ralph has created a symmetrical bridged class D tube amplifier.... Of course, I'm guessing, but I'd love to hear more. 

Can Ralph or Al expand on this?  Very interesting indeed. 

Just reading this revived thread.  Makes me miss AL.... @atmasphere   

Ralph, you guys were a good team of sorts.  Al always had your back and really had my back too.  Miss my friend.