Horology: time measuring systems or devices – Time interval – Electrical or electromechanical
Patent
1992-05-28
1993-04-06
Miska, Vit W.
Horology: time measuring systems or devices
Time interval
Electrical or electromechanical
368118, G04F 800, G04F 1000
Patent
active
052009335
ABSTRACT:
A high resolution event interval timing system measures short time intervals such as occur in high energy physics or laser ranging. Timing is provided from a clock (38) pulse train (37) and analog circuitry (44) for generating a triangular wave (46) synchronously with the pulse train (37). The triangular wave (46) has an amplitude and slope functionally related to the time elapsed during each clock pulse in the train. A converter (18, 32) forms a first digital value of the amplitude and slope of the triangle wave at the start of the event interval and a second digital value of the amplitude and slope of the triangle wave at the end of the event interval. A counter (26) counts the clock pulse train (37) during the interval to form a gross event interval time. A computer (52) then combines the gross event interval time and the first and second digital values to output a high resolution value for the event interval.
REFERENCES:
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patent: 4433919 (1984-02-01), Hoppe
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J. Kalisz et al., "Error Analysis and Design of the Nutt Time-Interval Digitiser with Picosecond Resolution", J. Phys. E:Sci Insrum. 20:1330 (1987).
J. Kostamovaara et al., "Time-To-Digital Converter with an Analog Interpolation Circuit", Rev. Sci. Instrum. 57(11):2880 (1986).
Fuller Kenneth R.
Thornton Glenn W.
Gaetjens Paul D.
Miska Vit W.
Moser William R.
The United States of America as represented by the United States
Wilson Ray G.
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