Method and apparatus for time measurement

Details Method and apparatus for time measurement Method and apparatus for time measurement

2008-01-01

2008-01-01

Bradley, P. Austin (Department: 2833)

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

C368S118000, C368S119000

Reexamination Certificate

active

11151233

ABSTRACT:
A method is provided for accurate time measurement. Time is first measured with a first oscillator. At designated intervals, a second oscillator is activated for a period of time based on the first oscillator. The second oscillator is more accurate than the first oscillator. Pulses are then counted from the second oscillator during the period of time. The second oscillator is then turned off after the period of time. The count from the second oscillator is used as a new measurement of the period of time of the first oscillator.

REFERENCES:
patent: 2510485 (1950-06-01), Vossberg
patent: 4254492 (1981-03-01), McDermott, III
patent: 5382910 (1995-01-01), Walsh
patent: 7065668 (2006-06-01), Kosuda et al.
patent: 2004/0114469 (2004-06-01), Duffner et al.

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