GB2004155B - Quartz electronic timepieces - Google Patents
Quartz electronic timepiecesInfo
- 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
Links
- 239000010453 quartz Substances 0.000 title abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title abstract 3
- 230000010355 oscillation Effects 0.000 abstract 3
- 230000035559 beat frequency Effects 0.000 abstract 2
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>
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)
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 |
-
1977
- 1977-09-09 JP JP10849477A patent/JPS5441773A/en active Pending
-
1978
- 1978-09-07 GB GB7835983A patent/GB2004155B/en not_active Expired
- 1978-09-11 CH CH949778A patent/CH631315B/en unknown
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 |