On Thu, 05 Apr 2007 17:32:48 GMT, John E. wrote:

amp.jpg

Schematic, please (c:

Seriously, that's a beautiful piece of work, John.

Each one of the 16 fet pairs has its own solid-state relay that can
enable or disable that pair. So at powerup time, or on request, we
ripple down the pairs and make sure each fet has the expected
transconductance gain. The yellow things are fuses; if we ever blow a
fet fuse, we know it.

John