15 Dec
2011
15 Dec
'11
2:13 p.m.
On 12/14/2011 08:14 PM, Mouse wrote:
I thoguht in the end he amanged ot get the FET cirucit to be better than
the light bulb, but it took a lot of work (and probably wasn't worth it).
On the other, I'm considering an AGC circuit
that doesn't use a bulb,
but instead uses a FET as a variable resistor, and trying to figure out
where it's got anything nonlinear in it (assuming the amplifier is
running class A).
Jim Williams (RIP) did a LOT of research on this. The bulb
outperformed the FET by a gigantic margin. (just sayin'..)
That's a fascinating read; I'll try to find a pointer if you're
interested. (I have the saga in a paper book, "Analog Circuit Design:
Art, Science, and Personalites", one of my favorite books)
YEs, a great book. Along with Bob Pease's book ('Analog circuit
troubleshooting' or soemthign like that). Well worth reading.
I am sure
we all know the stroy of Fred Terman and a certain research
student.
Doesn't sound familiar to me, for what that may be worth.