On 07/21/2011 07:48 PM, Chris Albertson wrote:
How close to 50% duty cycle do you need. is 0.50 good enough or do you need 0.500000000 ? If all you need is 15% accuracy a 555 timer set up to make a 0.5 second pulse would work but if you need better, then maybe a phase lock loop with a much higher than 1Hz oscillator and then you divide that down to 2Hz and the 2Hz triggers a flip flop.
Take the 10 MHz and divide down to PPS rate, synchronise with the PPS if it is important. Otherwise you can go mid-ways to only divide down a little, then use that to synchronise the output of the 555 and then synchronise it in a second DFF with the 10 MHz. There are many ways to hold state, a capacitor is one such way.
Cheers, Magnus _______________________________________________ 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.
