[time-nuts] NIST frequency doubler
Dr Bruce Griffiths
bruce.griffiths at xtra.co.nz
Tue Jul 10 04:34:13 UTC 2007
SAIDJACK at aol.com wrote
>
> Thanks for the info Bruce, Magnus,
>
> I will be reading the Felton paper to get more info.
>
> With a bit of trickery, I bet this circuit can be used with Bipolar
> transistors.
>
> bye,
> Said
>
>
Said
You mean like the circuit in the attached file?
Input transformer configuration is the only way I can simulate a
centre-tapped transformer.
1 ohm resistors are merely present to keep the simulator happy with
transformer primaries connected in parallel.
The circuit is far more predictable than the JFET version, however there
is no data on the close in phase noise performance.
Whilst this circuit will work with the 2N3904's shown, with higher ft
transistors the emitter base reverse voltage ratings may be exceeded.
At least with JFETS the gate source reverse breakdown voltage is
relatively high.
Bruce
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