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-   -   Unity gain output stage Class D driver (https://www.diyaudio.com/forums/class-d/374839-unity-gain-output-stage-class-driver.html)

analog_sa 22nd July 2021 11:16 AM

Тhis would perhaps be interesting if Devialet amps actually sounded any good... Lifestyle audio.

ubergeeknz 22nd July 2021 10:10 PM

Quote:

Originally Posted by steveu (https://www.diyaudio.com/forums/class-d/374839-unity-gain-output-stage-class-driver-post6729115.html#post6729115)
It is difficult to say exactly what Devialet are doing but I suspect it is similar to the Yamaha hybrid amplifier where the power supply rails are switch-mode controlled so that the analog output devices operate with a maximum of about 4 Volts drop and therefore very little heat is wasted. In any case, the class-D outputs are not tacked on the output of an analog amplifier, but perhaps the other way around so that the analog amplifier dictates the final result.

Their video talks about the Class-D and Class-A amplifiers running in parallel, but who knows if that's how it actually works. They claim to have it patented, so one could always look up the patent for a clearer description.

Either way, I don't think it's the kind of thing most hobbyists could knock up from scratch.

ubergeeknz 22nd July 2021 10:11 PM

Quote:

Originally Posted by analog_sa (https://www.diyaudio.com/forums/class-d/374839-unity-gain-output-stage-class-driver-post6729148.html#post6729148)
Тhis would perhaps be interesting if Devialet amps actually sounded any good... Lifestyle audio.

Shots fired eh :D


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