On Thu, 3 Mar 2011 14:42:40 -0800 (PST), "
wrote:
On 2 Mar., 17:40, John Larkin
wrote:
I've always sort of liked the classic "GE" tape head/mic preamp
circuit:
ftp://jjlarkin.lmi.net/GEcircuit.jpg
but it occurred to me that it might also make a nice headphone amp...
ftp://jjlarkin.lmi.net/GE_headphone_amp.JPG
Audio tends to be nonsense, but at least the audio guys have fun
playing with circuits, whether they make a lot of sense or not.
John
speaking of bizarre : http://tubetime.us/?p=85
I'm sure someone here will love it 
-Lasse
Wild. Sort of a single-slope ADC and a PWM driver. I wonder what the
sensitivity is like.
I bet you do a similar thing with a single tiny-logic schmitt gate.
Vaguely a superregenerative idea, namely triggering along a slowly
decaying exponential.
John