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US Patent 10509434 Oscillator profiling for time synchronization

Patent 10509434 was granted and assigned to Amazon on December, 2019 by the United States Patent and Trademark Office.

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Patent attributes

Current Assignee
Amazon
Amazon
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
10509434
Date of Patent
December 17, 2019
Patent Application Number
15277489
Date Filed
September 27, 2016
Patent Citations Received
‌
US Patent 10887246 Adaptive data packing
Patent Primary Examiner
‌
Jaweed A Abbaszadeh
Patent abstract

The amount of drift in an oscillator, as a function of temperature, can be profiled by adjusting the temperature and monitoring the corresponding change in frequency of the oscillator. Temperature sensors on a computing device can provide the temperature readings for the profiling, as well as readings during operation. A system clock on the computing device can be synchronized with a reliable external clock at a regular interval, such as every fifteen minutes. Between those synchronizations, the temperature values provided by the temperature sensors can be determined and the corresponding oscillator drift determined according to the oscillator profile. The drift value can be used to adjust the output of the system clock to account for variations that may become present between the synchronization times. Effects of factors such as voltage and humidity can also be profiled to provide a more accurate timing signal.

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