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From: john larkin <jl@glen--canyon.com>
Newsgroups: sci.electronics.design
Subject: Re: multi-supply audio amp
Date: Tue, 07 Jan 2025 13:57:26 -0800
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On Tue, 7 Jan 2025 19:22:32 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

>john larkin <jl@glen--canyon.com> wrote:
>> I recall that there was an audio power amp topology that used two
>> transistors and two power supplies for each polarity output. Low
>> voltage swings used a low voltage supply but it cut over to a HV
>> supply for big swings, with diodes or something.
>> 
>> What was that called?
>> 
>> 
>
>Class E through G, iirc.  Class H makes the supply rail approximately track
>the output. (We use that for TEC controllers. )
>
>Cheers 
>
>Phil Hobbs 

Looks like G or H. Thanks.