On Thu, July 26, 2018 5:05 pm, Hal Murray wrote: > Has anybody built a microprocessor controlled PLL to handle this case?
There are failover clock generators (integrated circuits), typically marketed for use in telecom equipment where there is a requirement to synchronize with a reference clock if it is available, and if the reference clock is not available for some reason flag an alarm and continue running from a local oscillator. As pointed out, not necessarily "time-nuts" quality of close in phase noise and ADEV performance, but you can do handy things like have controlled slew on the output of the PLL so that there is no sudden phase jump when the reference clock goes away. -- Chris Caudle _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
