[time-nuts] Fury Interface Board simulation results

Bruce Griffiths bruce.griffiths at xtra.co.nz
Tue Dec 11 11:09:16 UTC 2007


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

The Fury EFC output range is [0, +5V]
The 10811A, 10544A have an EFC range of [-5V, +5V]
other OCXOs may have an EFC input range of [-10V ,0V], [0,+10V], [-10V,
+10V] or even [+2V, +8V] etc.

If the  circuit is changed so that R1 = R10 = 20K then

Range
[-10V, 0V]   U3A +ve input = 0 V.
[-5V, +5V]   U3A +ve input = +2.5V.
[0V, +10V]  U3A +ve input = +5V.
for a [-10V, +10V] range then R1=R10= 40K, U3A +ve input = +5V.
To check correct operation vary the Fury EFC output from 0 to 5V with
the desired offset at U3 +ve input.

Bruce




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