John Ackermann N8UR wrote:
Wenzel has some discussion and circuits at:
http://www.wenzel.com/documents/waveform.html.
The Shera GPSDO made clever use of the input circuit of a 74HCT4046 PLL
chip for squaring.
John
----
Doh... I was thinking that there was some vendor with ap notes on stuff
like this, and I couldn't recall who it was, and I'm actually looking at
a Wenzel OCXO sitting here on the desk.
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