JPS5476261A - Electronic wristwatch - Google Patents

Electronic wristwatch

Info

Publication number
JPS5476261A
JPS5476261A JP14415377A JP14415377A JPS5476261A JP S5476261 A JPS5476261 A JP S5476261A JP 14415377 A JP14415377 A JP 14415377A JP 14415377 A JP14415377 A JP 14415377A JP S5476261 A JPS5476261 A JP S5476261A
Authority
JP
Japan
Prior art keywords
frequency
oscillation
circuit
curve
temperature characteristics
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
JP14415377A
Other languages
Japanese (ja)
Inventor
Hideo Hoshi
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP14415377A priority Critical patent/JPS5476261A/en
Publication of JPS5476261A publication Critical patent/JPS5476261A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
    • G04F5/04—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses
    • G04F5/06—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses using piezoelectric resonators

Abstract

PURPOSE:To make output signals be time standard by changing the frequency dividing ratios of a frequency divider according to the differences in frequencies of two oscillation circuits. CONSTITUTION:Piezoelectric vibrators 3, 4 are connected to oscillation circuits 5, 6 respectively and the frequency-temperature characteristics of an oscillation frequency f1 in the oscillation circuit 5 are shown in the curve 10. The frequency- temperature characteristics of an oscillation frequency f2 in the oscillation circuit 6 are shown in the curve 11. The operation of DELTAf=f2-f1 is performed in a subtractor 7. Next, K x (DELTAf)<2> is created by an arithmetic circuit 8. Further, in a frequency dividing circuit 9, the frequency dividing ratio is changed according to the magnitude of the signal having been created in the arithmetic circuit 8 at the time of obtaining the output signal of a desired period by dividing down f1, whereby the output signal in which the frequency-temperature characteristics of the piezoelectric elements are as flat as like the curve 14 is obtained.
JP14415377A 1977-11-30 1977-11-30 Electronic wristwatch Pending JPS5476261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14415377A JPS5476261A (en) 1977-11-30 1977-11-30 Electronic wristwatch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14415377A JPS5476261A (en) 1977-11-30 1977-11-30 Electronic wristwatch

Publications (1)

Publication Number Publication Date
JPS5476261A true JPS5476261A (en) 1979-06-18

Family

ID=15355434

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14415377A Pending JPS5476261A (en) 1977-11-30 1977-11-30 Electronic wristwatch

Country Status (1)

Country Link
JP (1) JPS5476261A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56104505A (en) * 1980-01-10 1981-08-20 Suisse Horlogerie Oscillator having digital temperature compensating circuit
JPS56104504A (en) * 1980-01-10 1981-08-20 Suisse Horlogerie Oscillator and method of manufacturing same
JP2012160790A (en) * 2011-01-28 2012-08-23 Nippon Dempa Kogyo Co Ltd Oscillation device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56104505A (en) * 1980-01-10 1981-08-20 Suisse Horlogerie Oscillator having digital temperature compensating circuit
JPS56104504A (en) * 1980-01-10 1981-08-20 Suisse Horlogerie Oscillator and method of manufacturing same
JP2012160790A (en) * 2011-01-28 2012-08-23 Nippon Dempa Kogyo Co Ltd Oscillation device

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