Should anyone be puzzled over my "oscillator", it's the behavioral equivalent of a diff-pair, the explanation of which I posted yesterday (2/1/2014)...
...Jim Thompson
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| James E.Thompson | mens |
| Analog Innovations | et |
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.
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John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
OK, there is clearly an f/2 component in my output. There is none in the V1 source.
Where does the f/2 energy come from? If you can't figure that out, try asking one of your "young bucks."
Are you sure your oscillator is sub-locking to the sinewave source? It's a little hard to tell in that narrow time slice, but it sure looks like they are drifting in phase. So the "lock" may be an illusion of them being, by design, close in frequency.
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John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
I was thinking about how to do a Spice sim that is an analog to the pendulum pumped by the 60 Hz coil. The tricky part is coming up with a nonlinear resistor (or whatever) that approximates the force that the coil applies to the pendulum as a function of the pendulum's angular position. That curve will need to be fairly spikey to get decent pumping action.
Some other day. I've got to fix our hairdresser's 12-volt track lighting system (the fried parts of which are in the kitchen of the Chinese restaurant next door) and I think something else is going on this afternoon maybe.
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John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
You are a big boy, PAL, so run it in LTspice yourself. Copy the following text into a file named "InjectionLocking_DiodeOnly.cir" (you may need to rename D1N4148 to whatever LTspice likes as a name for that common diode).
Then, in LTspice, File, Open (the above filename), then RUN, and see for yourself.
"InjectionLocking_DiodeOnly.cir" is the following text...
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