CH631315GA3 - - Google Patents

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Publication number
CH631315GA3
CH631315GA3 CH949778A CH949778A CH631315GA3 CH 631315G A3 CH631315G A3 CH 631315GA3 CH 949778 A CH949778 A CH 949778A CH 949778 A CH949778 A CH 949778A CH 631315G A3 CH631315G A3 CH 631315GA3
Authority
CH
Switzerland
Prior art keywords
frequency
temperature
oscillations
oscillator
derived therefrom
Prior art date
Application number
CH949778A
Other languages
French (fr)
Other versions
CH631315B (en
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
Publication of CH631315B publication Critical patent/CH631315B/en
Application filed filed Critical
Publication of CH631315GA3 publication Critical patent/CH631315GA3/fr

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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>
CH949778A 1977-09-09 1978-09-11 ELECTRONIC WATCH PART, ESPECIALLY ELECTRONIC BRACELET WATCH. CH631315B (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
CH631315B CH631315B (en)
CH631315GA3 true CH631315GA3 (en) 1982-08-13

Family

ID=14486188

Family Applications (1)

Application Number Title Priority Date Filing Date
CH949778A CH631315B (en) 1977-09-09 1978-09-11 ELECTRONIC WATCH PART, ESPECIALLY ELECTRONIC BRACELET 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.
GB2080579B (en) * 1979-12-20 1984-10-10 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
GB2004155B (en) 1982-03-17
CH631315B (en)
GB2004155A (en) 1979-03-21
JPS5441773A (en) 1979-04-03

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