GB2004155B - Quartz electronic timepieces - Google Patents

Quartz electronic timepieces

Info

Publication number
GB2004155B
GB2004155B GB7835983A GB7835983A GB2004155B GB 2004155 B GB2004155 B GB 2004155B GB 7835983 A GB7835983 A GB 7835983A GB 7835983 A GB7835983 A GB 7835983A GB 2004155 B GB2004155 B GB 2004155B
Authority
GB
United Kingdom
Prior art keywords
frequency
temperature
oscillations
quartz
oscillator
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.)
Expired
Application number
GB7835983A
Other versions
GB2004155A (en
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
Publication of GB2004155A publication Critical patent/GB2004155A/en
Application granted granted Critical
Publication of GB2004155B publication Critical patent/GB2004155B/en
Expired 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Laminated Bodies (AREA)
  • Adornments (AREA)

Abstract

The time standard of a quartz electronic timepiece has two quartz oscillators of different predetermined temperature/frequency characteristics but the same frequency at a given temperature in the working temperature range. The oscillations used to control the time display are made substantially independent of temperature variation over the range by producing a beat frequency between the outputs of the oscillators (or frequency divided oscillations derived therefrom) and effectively adding the resultant to the output of one oscillator (or to frequency divided oscillations derived therefrom). In an embodiment, one oscillator (f1) has half the temperature coefficient of the other (f2), and adding the beat frequency (f1- f2) to the frequency of the former (f1) produces a frequency (2f1-f2) substantially compensated for temperature change. <IMAGE>
GB7835983A 1977-09-09 1978-09-07 Quartz electronic timepieces Expired GB2004155B (en)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
GB2004155A GB2004155A (en) 1979-03-21
GB2004155B true GB2004155B (en) 1982-03-17

Family

ID=14486188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7835983A Expired GB2004155B (en) 1977-09-09 1978-09-07 Quartz electronic timepieces

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.
EP0047320A4 (en) * 1979-12-20 1982-05-10 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
GB2004155A (en) 1979-03-21
JPS5441773A (en) 1979-04-03
CH631315GA3 (en) 1982-08-13
CH631315B (en)

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920907