From: jl@glen--canyon.com   
      
   On Sat, 10 Jan 2026 18:58:44 +0000, Cursitor Doom    
   wrote:   
      
   >On Sat, 10 Jan 2026 05:56:18 -0800, john larkin    
   >wrote:   
   >   
   >>On Sat, 10 Jan 2026 11:19:56 +0000, Cursitor Doom    
   >>wrote:   
   >>   
   >>>Are they typically, or invariably even, set up to run in class D?   
   >>>   
   >>>CD   
   >>   
   >>Certainly switchmode, not linear.   
   >>   
   >>There are a bunch of named classes, but all are basically class D.   
   >>   
   >>GaNs can switch really fast, which for a given power makes things   
   >>small.  Aside from that, they have no real advantages over mosfets.   
   >>   
   >>A delta-sigma GaN amp might be fun.   
   >>   
   >>But audio makes no sense, which is why people still spend big on   
   >>turntables and tubes.   
   >   
   >So what else are they suited to?   
      
   GaN? Lots of things.   
      
   We're using them in fast switches, the output stages of this:   
      
   https://highlandtechnology.com/Product/P500   
      
   which makes beautiful clean pulses. We're doing a high voltage pulse   
   generator too.   
      
   GaN is used in tiny wall warts. And for RF stuff. I think some   
   microwave ovens use them instead of magnetrons.   
      
   Their figures of merit, amps/pF and such, are astounding. And they   
   turn on hard with 5-volt gate drive.   
      
      
      
      
      
      
   John Larkin   
   Highland Tech Glen Canyon Design Center   
   Lunatic Fringe Electronics   
      
   --- SoupGate-Win32 v1.05   
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