[time-nuts] Why are 1PPS signals so skinny?

Magnus Danielson magnus at rubidium.dyndns.org
Wed May 16 14:57:19 UTC 2012


On 05/16/2012 02:21 PM, shalimr9 at gmail.com wrote:
> It would be very easy to use a constant current to drive the LED and simply short it periodically to provide the blinking without supply current variations. You would still have short transients in the drive circuit, but these should be much easier to filter.

Agreed. You could also have a pair of LEDs and alternate which of them 
is lit.

Then, to reduce the impact on the PPS signals, the LED on/off could be 
forced to be phase-shifted to the PPS.

Cheers,
Magnus




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