Method and apparatus for restarting a GPS-based timing...

Details Method and apparatus for restarting a GPS-based timing... Method and apparatus for restarting a GPS-based timing...

2006-06-20

2006-06-20

Mis, David (Department: 2817)

Oscillators

With frequency calibration or testing

Reexamination Certificate

active

07064619

ABSTRACT:
A method and apparatus for restarting a GPS-based timing system without a GPS signal is provided. More specifically, there is provided a system comprising an antenna, a GPS receiver coupled to the antenna and configured to generate a GPS traceable timing signal based on a GPS transmission, and a timing system coupled to the GPS receiver, the timing system comprising a holdover oscillator, timing circuitry coupled to the holdover oscillator and configured to receive the GPS traceable timing signal and to calculate a correction factor for the holdover oscillator, and a non-volatile memory coupled to the timing circuitry, wherein the timing circuitry is configured to store the correction factor on the non-volatile memory.

REFERENCES:
patent: 4899117 (1990-02-01), Vig
patent: D364621 (1995-11-01), Clarke et al.
patent: 5655018 (1997-08-01), Estevez et al.
patent: 6049315 (2000-04-01), Meyer
patent: 6104287 (2000-08-01), Meyer

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