[time-nuts] Fury Interface Board simulation results

[Bruce Griffiths]

xaos wrote:
> Hello Everyone,
>
> I have been running simulations of different parts of the Fury Interface 
> board.
>
> Here are the results so far.
>
> http://www.darksmile.net/ee/index.html
>
> Your feedback is most welcome.
>
> -George
>
>   
George

A more versatile EFC circuit that allows independent adjustment of EFC
span and offset is possible if an additional opamp is used.
A 2x differential amplifier translates the Fury EFC output to either
{-10V, 0V] or [0V, +10V] depending on its input connections,  a second
opamp inverts a  +5Vreference to produce a -5V source offset source, and
a third opamp configured as an inverting opamp scales the EFC range and
adds it to the offset to produce the required EFC range to suit the OCXO
in use. An OCXO  EFC range anywhere between -10V and + 10V can be
accommodated by selecting a couple of resistors  combined with a set of
jumpers.
If you want the circuit schematic I can produce it by around 1300 UTC
tomorrow.

Bruce