JPS5441773A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS5441773A
JPS5441773A JP10849477A JP10849477A JPS5441773A JP S5441773 A JPS5441773 A JP S5441773A JP 10849477 A JP10849477 A JP 10849477A JP 10849477 A JP10849477 A JP 10849477A JP S5441773 A JPS5441773 A JP S5441773A
Authority
JP
Japan
Prior art keywords
electronic watch
temperature
obtain stable
same zero
different frequency
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
JP10849477A
Other languages
Japanese (ja)
Inventor
Masaaki Kato
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 JP10849477A priority Critical patent/JPS5441773A/en
Priority to GB7835983A priority patent/GB2004155B/en
Priority to CH949778A priority patent/CH631315B/en
Publication of JPS5441773A publication Critical patent/JPS5441773A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
    • G04G3/027—Circuits for deriving low frequency timing pulses from pulses of higher frequency by combining pulse-trains of different frequencies, e.g. obtained from two independent oscillators or from a common oscillator by means of different frequency dividing ratios
    • 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 obtain stable frequency over a wide temperature range by using two crystal vibrators of different frequency characteristics having the same zero temperature coefficient temperature.
COPYRIGHT: (C)1979,JPO&Japio
JP10849477A 1977-09-09 1977-09-09 Electronic watch Pending JPS5441773A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10849477A JPS5441773A (en) 1977-09-09 1977-09-09 Electronic watch
GB7835983A GB2004155B (en) 1977-09-09 1978-09-07 Quartz electronic timepieces
CH949778A CH631315B (en) 1977-09-09 1978-09-11 ELECTRONIC WATCH PART, ESPECIALLY ELECTRONIC BRACELET WATCH.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10849477A JPS5441773A (en) 1977-09-09 1977-09-09 Electronic watch

Publications (1)

Publication Number Publication Date
JPS5441773A true JPS5441773A (en) 1979-04-03

Family

ID=14486188

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10849477A Pending JPS5441773A (en) 1977-09-09 1977-09-09 Electronic watch

Country Status (3)

Country Link
JP (1) JPS5441773A (en)
CH (1) CH631315B (en)
GB (1) GB2004155B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH621680B (en) * 1979-05-22 Suisse Horlogerie OSCILLATOR WITH TEMPERATURE COMPENSATION.
WO1981001888A1 (en) * 1979-12-20 1981-07-09 Ricoh Watch Linearizing circuit and electronic time piece using the same
CH626500B (en) * 1980-01-10 Suisse Horlogerie OSCILLATOR WITH DIGITAL TEMPERATURE COMPENSATION.
JPS57578A (en) * 1980-06-03 1982-01-05 Seiko Epson Corp Electronic timepiece
CH650122GA3 (en) * 1981-12-17 1985-07-15
US5428315A (en) * 1985-01-22 1995-06-27 The United States Of America As Represented By The Secreatry Of The Army Method of making radiation hardened quartz crystal oscillators

Also Published As

Publication number Publication date
CH631315B (en)
CH631315GA3 (en) 1982-08-13
GB2004155A (en) 1979-03-21
GB2004155B (en) 1982-03-17

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