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A neat and compact way to generate RF harmonics...
On Sat, 10 Apr 2004 08:22:21 GMT, Robert Baer
wrote: Not a varactor (diode), but a switching diode; fast. Snap-off is lotz better. And they are a *LOT* smaller! Thanks, Robert (and all else) I'd prefer a diode solution as there'd be no power supply requirements for each device. The tiny size is an added bonus, of course. But what's the drawback with superfast switching diodes as against active inverters? I'm sure there must be (at least) one... |
On Sat, 10 Apr 2004 08:22:21 GMT, Robert Baer
wrote: Not a varactor (diode), but a switching diode; fast. Snap-off is lotz better. And they are a *LOT* smaller! Thanks, Robert (and all else) I'd prefer a diode solution as there'd be no power supply requirements for each device. The tiny size is an added bonus, of course. But what's the drawback with superfast switching diodes as against active inverters? I'm sure there must be (at least) one... |
I'd prefer a diode solution as there'd be no power supply requirements for each device. The tiny size is an added bonus, of course. But what's the drawback with superfast switching diodes as against active inverters? I'm sure there must be (at least) one... Well for starters, they often, (VERY often) act as parametric devices and oscillate on their own at the frequency of their choosing. W4ZCB |
I'd prefer a diode solution as there'd be no power supply requirements for each device. The tiny size is an added bonus, of course. But what's the drawback with superfast switching diodes as against active inverters? I'm sure there must be (at least) one... Well for starters, they often, (VERY often) act as parametric devices and oscillate on their own at the frequency of their choosing. W4ZCB |
Paul Burridge wrote:
On Sat, 10 Apr 2004 08:22:21 GMT, Robert Baer wrote: Not a varactor (diode), but a switching diode; fast. Snap-off is lotz better. And they are a *LOT* smaller! Thanks, Robert (and all else) I'd prefer a diode solution as there'd be no power supply requirements for each device. The tiny size is an added bonus, of course. But what's the drawback with superfast switching diodes as against active inverters? I'm sure there must be (at least) one... An active inverter is S L O W by comparison; a good, fast diode can have turnoff times in the tens of picoseconds region. |
Paul Burridge wrote:
On Sat, 10 Apr 2004 08:22:21 GMT, Robert Baer wrote: Not a varactor (diode), but a switching diode; fast. Snap-off is lotz better. And they are a *LOT* smaller! Thanks, Robert (and all else) I'd prefer a diode solution as there'd be no power supply requirements for each device. The tiny size is an added bonus, of course. But what's the drawback with superfast switching diodes as against active inverters? I'm sure there must be (at least) one... An active inverter is S L O W by comparison; a good, fast diode can have turnoff times in the tens of picoseconds region. |
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On Sun, 11 Apr 2004 14:14:56 +0200, "Fred Bartoli"
r_AndThisToo wrote: Don't let Paul dream too much about picoseconds. Well, quite. I wouldn't know what to do with all those extra harmonics, anyway. :-) Diodes sound great, but I'm heavily put off by that comment earlier in the thread that they're prone to self oscillation. :-( What's a "parametric device" anyway? In order to achieve results that good, one have to pay very careful attention to "wiring". There's still a lot of room for Paul to improve his PCB design skills ;-) Fair comment. But I *am* working on it! |
On Sun, 11 Apr 2004 14:14:56 +0200, "Fred Bartoli"
r_AndThisToo wrote: Don't let Paul dream too much about picoseconds. Well, quite. I wouldn't know what to do with all those extra harmonics, anyway. :-) Diodes sound great, but I'm heavily put off by that comment earlier in the thread that they're prone to self oscillation. :-( What's a "parametric device" anyway? In order to achieve results that good, one have to pay very careful attention to "wiring". There's still a lot of room for Paul to improve his PCB design skills ;-) Fair comment. But I *am* working on it! |
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