Precise time period measurement

Details Precise time period measurement Precise time period measurement

2005-09-13

2005-09-13

Miska, Vit W. (Department: 2841)

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

C368S118000, C368S120000, C324S076540

Reexamination Certificate

active

06944099

ABSTRACT:
Measurement of the period of a relatively slow but precise reference clock in terms of a high speed oscillating clock, such as from a voltage controlled oscillator (VCO). The reference clock is known to be accurate and stable and values of the time measurement unit are output that determine the integer and fractional number of the high speed oscillating clock periods which occurred during one reference clock cycle. The measurements are very accurate and all cycles of the reference clock are measured. Such measurements enable various frequency control schemes over the high speed oscillating clock source.

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Rahkonen, T., Kostamovaara, J., Saynajakangas, S.,Time Interval Measurements Using Integrated Tapped CMOS Delay Lines, Proceedings of the 32ndMidwest Symposium, Circuits and Systems, pp. 202-204 (Aug. 14-16, 1989).

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