TIME MEASURING DEVICE, DISTANCE MEASURING DEVICE, AND OPTICAL SENSOR DEVICE

A time measuring device comprises a signal generating circuit configured to generate a plurality of reference signals in an equivalent cycle with different phases; a first counter configured to output a fine count value, using a plurality of first pulse signals obtained from the plurality of referen...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SHIMIZU, Takayuki, INOUE, Takahiro, ARIMURA, RYUHJI, IKEDA, Tetsuro, SATO, HIDEKI
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES HOROLOGY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING TIME-INTERVAL MEASURING
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Beschreibung
Zusammenfassung:	A time measuring device comprises a signal generating circuit configured to generate a plurality of reference signals in an equivalent cycle with different phases; a first counter configured to output a fine count value, using a plurality of first pulse signals obtained from the plurality of reference signals; a second counter configured to output a coarse count value, using a plurality of second pulse signals obtained from the plurality of reference signals and having frequencies lower than frequencies of the plurality of first pulse signals; and a control unit configured to determine whether to correct the coarse count value in accordance with the fine count value and the coarse count value latched with a latch signal, and, if the coarse count value needs to be corrected, configured to calculate a bin number, using the fine count value and a coarse correction value obtained by correcting the coarse count value.