[time-nuts] Triangle Waves
lists at cq.nu
Wed Feb 3 03:17:46 UTC 2010
On Feb 2, 2010, at 9:57 PM, Bruce Griffiths wrote:
> Joseph M Gwinn wrote:
> Figure 8 (attached) from Collin's paper indicates that the jitter of a 100Hz wien bridge oscillator is of the order of a few hundred nanosec or so.
> This was taken using a 3 stage limiter and a 1 sec counter gate time.
> It may be feasible to do better.
> It would also appear to be feasible to produce a 10Hz sinewave with ns jitter by low pass filtering a square wave using a combination of active and passive RC filtering.
That figure pretty clearly shows the issue of getting a good trigger on a low frequency signal.
It's a pretty big guess to figure out what the 100 Hz oscillator is doing. At least to my eye it's pretty far from the 1 ppb / second level.
As long as we're on the Collins paper - has anybody dug up the final paper referenced? I believe it's titled something like "Hard Limiter Experimental Results"?
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