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Time distribution switch

  • US 9,520,860 B2
  • Filed: 10/18/2013
  • Issued: 12/13/2016
  • Est. Priority Date: 10/19/2012
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, at a time distribution device, two or more consecutive time signals from a first external time source;

    determining a first duration between each of the two or more consecutive time signals from the first external time source, wherein the first duration is based on an internal oscillator;

    receiving, at the time distribution device, two or more consecutive time signals from a second external time source;

    determining a second duration between each of the two or more consecutive time signals from the second external time source, wherein the second duration is based on the internal oscillator;

    comparing the first duration and the second duration to determine a time source with the lowest variation in the duration between the two or more consecutive time signals;

    selecting the time source with the lowest variation as a best available time source; and

    distributing the best available time source to one or more consuming devices.

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