JPS5567690A - Electronic watch - Google Patents

Electronic watch

Info

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
Application number
JP14189878A
Other languages
Japanese (ja)
Inventor
Akira Toyokuni
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 JP14189878A priority Critical patent/JPS5567690A/en
Publication of JPS5567690A publication Critical patent/JPS5567690A/en
Pending legal-status Critical Current

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.
JP14189878A 1978-11-17 1978-11-17 Electronic watch Pending JPS5567690A (en)

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)

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