On Sun, 02 Feb 2014 09:58:52 -0800, John Larkin
wrote:
On Sun, 02 Feb 2014 09:08:17 -0700, Jim Thompson
wrote:
On Sun, 02 Feb 2014 08:07:25 -0800, John Larkin
wrote:
On Sun, 02 Feb 2014 08:49:55 -0700, Jim Thompson
wrote:
PAL fails to realize that injection locking an oscillator requires an
oscillator :-}
You fail to realize that a parametric oscillator is an oscillator.
His post was an attempt to output a subharmonic without the
oscillator. There are better ways to handle such a scenario.
For example, see my boom-box machine (circa 1979)...
http://www.analog-innovations.com/SED/SubBassEnhancer_BoomBoxProcessor.pdf
BoomBox! Hilarious hairball. Why do something with a few parts, when you can use
hundreds?
Here is an injection-locked OSCILLATOR....
http://www.analog-innovations.com/SED/InjectionLockingAnOscillator.pdf
...Jim Thompson
Trivial and unoriginal. It's more interesting to use the parametric pump as the
gain element.
Of course, PAL, it works so-o-o-o well :-}
...Jim Thompson
The point is that it does work. It makes an f/2 signal using only a diode as the
active element, which was (some time ago) in question here. With a proper
varicap diode and some optimization, it would be more efficient. But it works.
It was sort of an homage to A. F. Boff.
http://www.hpl.hp.com/hpjournal/pdfs...Fs/1960-01.pdf
I used power varactors in the early '60's (tripling) to get to
144-148MHz (2-meter FM ham band) from 48-49.333MHz... to get 5 Watts
output. The transistors of that era weren't quite up to directly
making 144MHz.
Drilled a hole in the middle of the roof of my '61 Renault Dauphine
and mounted a waterproof BNC connector for a quarter-wave whip ;-)
But getting back to subharmonic inject of "oscillators"... I think
you're deluding yourself calling that parametric pumping.
See for example, with an ordinary diode and input DC-skewed (as in
your post, but in the proper direction
...
http://www.analog-innovations.com/SED/InjectionLockingAnOscillator_DiodeOnly.pdf
But we'd all be interested in seeing your ASC file when it includes "a
proper varicap diode and some optimization" :-}
...Jim Thompson
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