Dave M wrote:
Hello,
I have a PRS10 rubidium which gives a 1pps output. The output is a
10 us positive pulse.
I need to convert that to a 50:50 duty cycle pulse. Still 1pps.
I'm hoping for a simple circuit rather than having to use a pic.
I don't mind a bit of propagation delay, but I need to preserve the
low jitter on the rising edge, and hopefully also the falling edge.
Any ideas out there
Regards
Steve
The simplest way that I can think of is to feed both inputs of an XOR
gate with your 1pps signal to double it to 2pps, then feed the XOR
output into a flipflop to get back to 1pps with 50% duty cycle. You
might have to delay the 1pps into one of the XOR inputs with a small
RC to reliably trigger the flipflop. Use 74HC or AC gates and the
jitter should be tolerable.
Cheers,
David
dgminala at mediacombb dot net
All that will achieve is generating a pulse about 10us wide of
indeterminate polarity.
Bruce
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
