JPS5567690A - Electronic watch - Google Patents
Electronic watchInfo
- Publication number
- JPS5567690A JPS5567690A JP14189878A JP14189878A JPS5567690A JP S5567690 A JPS5567690 A JP S5567690A JP 14189878 A JP14189878 A JP 14189878A JP 14189878 A JP14189878 A JP 14189878A JP S5567690 A JPS5567690 A JP S5567690A
- Authority
- JP
- Japan
- Prior art keywords
- temperature characteristics
- temperature
- point
- curie point
- turn over
- 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
Links
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
- Electric Clocks (AREA)
Abstract
PURPOSE:To improve the inconvenience of the step temperature characteristics due to non-symmetry of the temperature characteristics of capacitors, by increasing the turn over point of the frequency versus temperature characteristics of the X-cut crystal oscillator of oscillation circuit than the Curie point of the temperature compensation capacitor. CONSTITUTION:The turn over point of the X-cut crystal oscillator in the crystal oscillation circuit of the electronic watch is increased by 1, 2, 3 deg.C than the Curie point of the temperature compensation capacitor. Thus, due to the non-symmetry of the capacitance versus temperature characteristics from the Curie point of the temperature compensation capacitor, in comparison with the step temperature characteristics 7 of conventional crystal oscillation circuits in which the turn over point of the crystal oscillator is taken the same as the Curie point of the capacitor, as shown in curves 8, 9, 10, the high temperature side changes toward advancing direction and the low temperature side changes toward delay direction to obtain more flat step versus temperature characteristics.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14189878A JPS5567690A (en) | 1978-11-17 | 1978-11-17 | Electronic watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14189878A JPS5567690A (en) | 1978-11-17 | 1978-11-17 | Electronic watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5567690A true JPS5567690A (en) | 1980-05-21 |
Family
ID=15302724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14189878A Pending JPS5567690A (en) | 1978-11-17 | 1978-11-17 | Electronic watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5567690A (en) |
-
1978
- 1978-11-17 JP JP14189878A patent/JPS5567690A/en active Pending
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