[time-nuts] Fury Interface Board: How about TI OPA277?

Bruce Griffiths bruce.griffiths at xtra.co.nz
Sat Nov 3 19:24:39 EDT 2007


kevin-usenet at horizon.com wrote:
>   (Using an input voltage lower than your own supply rail seems odd.)
>   
Not really, for example dc grounding the varicap cathode means that one
doesn't need to include a low noise, low drift reference within the OCXO
for the varicap.
However such a reference may then be required in the EFC drive circuitry.
With an analog phase lock loop driving the EFC no precision voltage
references may be necessary.

Bruce



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