Measuring a long time period

Details Measuring a long time period Measuring a long time period

2007-01-12

2008-12-02

Miska, Vit W (Department: 2833)

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

C341S166000

Reexamination Certificate

active

07460441

ABSTRACT:
A time period of an event is determined by charging a known value capacitor from a constant current source during the event. The resultant voltage on the capacitor is proportional to the event time period and may be calculated from the resultant voltage and known capacitance value. Capacitance is measured by charging a capacitor from a constant current source during a known time period. The resultant voltage on the capacitor is proportional to the capacitance thereof and may be calculated from the resultant voltage and known time period. A long time period event may be measured by charging a first capacitor at the start of the event and a second capacitor at the end of the event, while counting clock times therebetween. Delay of an event is done by charging voltages on first and second capacitors at beginning and end of event, while comparing voltages thereon with a reference voltage.

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Invitation to Pay Additional Fees and, Where Applicable, Protest Fee mailed May 7, 2008.
International Search Report and Written Opinion for PCT/US2008/050563 mailed Jul. 22, 2008.

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