Device for measuring the duration of a time slot

Details Device for measuring the duration of a time slot Device for measuring the duration of a time slot

1995-09-21

1998-02-10

Roskoski, Bernard

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

368119, G04F 800, G04P 1000

Patent

active

057176590

ABSTRACT:
A device for measuring the duration of a time slot or interval includes a first clock for supplying pulses of period T and a second clock, whose pulses are shifted with respect to the first. A digital circuit counts the number of pulses of the clocks, which are followed by a complete period T and which occur between the start signal and the stop signal. An analog circuit determines the times separating the start signal and the start of the first pulses of the clocks after the start signal and the times separating the stop signal and the end of the final periods of the clocks before the stop signal, and converts the analog data into digital data. A processing circuit determines the duration of the time slot, and resolves any ambiguity situation, which could lead to a clock period counting error.

REFERENCES:
patent: 3934400 (1976-01-01), Nishimura et al.
patent: 4912734 (1990-03-01), Frauenglass
patent: 5200933 (1993-04-01), Thornton et al.
patent: 5319614 (1994-06-01), Hayashi
patent: 5325340 (1994-06-01), Ramsey
patent: 5570326 (1996-10-01), Trystram
Baron, "The Vernier Time Measuring Technique", 1957, pp. 21-30; IRE.
U.S. Patent Application Serial No. 08/259,714 filed Jun. 14, 1994 corresponding to FR-93 08145; Inventor: Philippe Trystram.

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