On 13 Apr 2004 10:44:19 -0700, (Tom Bruhns) wrote:

Hi Harold,

Nice of John to make that offer!

As for background and theory, I'll make copies of an artcile or two to
send you, about the discovery of the effect and the optimization of
diode structure to enhance it. I suppose that the effect you're
seeing with the Schottkys is almost entirely capacitive stored charge,
and that won't "sweep out" of the diode with the sharp step you get
with a step-recovery diode. The articles I'll send have info about
efficiency, which can be surprisingly high considering the high order
of multiplication.

What's a sensible target for the multiplication factor using diodes
from say a 4Mhz source? I'd be nice to go straight to say 20X on
account of the large physical size of the filters at lower HF., not to
mention the savings on intermediate stages.