JPS57118184A - Time measuring device - Google Patents

Time measuring device

Info

Publication number
JPS57118184A
JPS57118184A JP19361581A JP19361581A JPS57118184A JP S57118184 A JPS57118184 A JP S57118184A JP 19361581 A JP19361581 A JP 19361581A JP 19361581 A JP19361581 A JP 19361581A JP S57118184 A JPS57118184 A JP S57118184A
Authority
JP
Japan
Prior art keywords
interpolation
oscillator
low level
input
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP19361581A
Other languages
Japanese (ja)
Inventor
Deii Jiyakuson Uiriamu
Shii Jiensen Ronarudo
Jiei Makureodo Kenisu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Japan Inc
Original Assignee
Yokogawa Hewlett Packard Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yokogawa Hewlett Packard Ltd filed Critical Yokogawa Hewlett Packard Ltd
Publication of JPS57118184A publication Critical patent/JPS57118184A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F10/00—Apparatus for measuring unknown time intervals by electric means
    • G04F10/04—Apparatus for measuring unknown time intervals by electric means by counting pulses or half-cycles of an ac

Abstract

PURPOSE:To eliminate the need for periodic recalibration for oven and interpolation or stretching circuits by measuring the calibration pulses of known periods with a counter circuit. CONSTITUTION:For the purpose of the frequency measurement of an input A, an unknown frequency A is coupled to start and stop interpolation lines 52, 54 with a multiplexer 8, whilist a reference oscillator 6 is coupled to a synchronizing line 14. When an FF24 is set, the input of a start gate 36 goes to the low level and a start interpolation output 2 lowers. In order to calibrate the interpolation, the multiplexer 8 couples the signal from the oscillator 6 to the lines 52, 54, 14. When a calibration input line 44 for multiplexers 32, 24 is the high level, interpolation FFs 24, 30 are clocked and both are held at the low level. When the line 44 is the low level, the FFs 22,28 are delayed by one oscillator period, and the interpolation pulses of two oscillator period length are generated.
JP19361581A 1980-12-01 1981-12-01 Time measuring device Pending JPS57118184A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21161280A 1980-12-01 1980-12-01

Publications (1)

Publication Number Publication Date
JPS57118184A true JPS57118184A (en) 1982-07-22

Family

ID=22787648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19361581A Pending JPS57118184A (en) 1980-12-01 1981-12-01 Time measuring device

Country Status (1)

Country Link
JP (1) JPS57118184A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008044052A (en) * 2006-08-11 2008-02-28 Max Co Ltd Stapler
JP2008044056A (en) * 2006-08-11 2008-02-28 Max Co Ltd Stapler
JP2008044026A (en) * 2006-08-11 2008-02-28 Max Co Ltd Stapler
JP2008044058A (en) * 2006-08-11 2008-02-28 Max Co Ltd Stapler
JP2008044057A (en) * 2006-08-11 2008-02-28 Max Co Ltd Stapler

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008044052A (en) * 2006-08-11 2008-02-28 Max Co Ltd Stapler
JP2008044056A (en) * 2006-08-11 2008-02-28 Max Co Ltd Stapler
JP2008044026A (en) * 2006-08-11 2008-02-28 Max Co Ltd Stapler
JP2008044058A (en) * 2006-08-11 2008-02-28 Max Co Ltd Stapler
JP2008044057A (en) * 2006-08-11 2008-02-28 Max Co Ltd Stapler

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