Re: multi-supply audio amp

On Tue, 7 Jan 2025 22:27:37 +0100, Lasse Langwadt <llc@fonz.dk> wrote:

On 1/7/25 20:19, john larkin 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-G (or H) depending on who you ask
>
https://sound-au.com/articles/class-g.htm

Cool. Thanks.

I need a power amp that runs near ground most of the time but spikes
to higher output voltage occasionally. And runs 4 quadrant.

I have a switcher design that looks good, but it's slow.

I vaguely recall the G/H topology having someone's name too.