JPS55121181A - Electronic watch - Google Patents
Electronic watchInfo
- Publication number
- JPS55121181A JPS55121181A JP2726379A JP2726379A JPS55121181A JP S55121181 A JPS55121181 A JP S55121181A JP 2726379 A JP2726379 A JP 2726379A JP 2726379 A JP2726379 A JP 2726379A JP S55121181 A JPS55121181 A JP S55121181A
- Authority
- JP
- Japan
- Prior art keywords
- oscillators
- featuring
- oscillation frequencies
- beat
- 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.)
- Pending
Links
Landscapes
- Electric Clocks (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
PURPOSE:To increase the watch accuracy by detecting the beat and phase difference of the oscillation frequencies each other of the oscillators using the crystal oscillators featuring the peak temperatures and then applying the output of the oscillator which oscillates at the highest frequency for the watch signal. CONSTITUTION:Outputs f1 and f2 of the crystal oscillators featuring the different the peak temperatures and equal oscillation frequencies at each peak temperature are used for comparison 3 of the height of the frequencies of both oscillators by detecting the beat and phase between both oscillation frequencies. Then the output of the oscillator featuring the highest frequency obtained through the comparison result is selected by switching circuit 4 to be sent to divider/driver circuit 5.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2726379A JPS55121181A (en) | 1979-03-10 | 1979-03-10 | Electronic watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2726379A JPS55121181A (en) | 1979-03-10 | 1979-03-10 | Electronic watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55121181A true JPS55121181A (en) | 1980-09-18 |
Family
ID=12216180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2726379A Pending JPS55121181A (en) | 1979-03-10 | 1979-03-10 | Electronic watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55121181A (en) |
-
1979
- 1979-03-10 JP JP2726379A patent/JPS55121181A/en active Pending
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