JPS55121181A - Electronic watch - Google Patents

Electronic watch

Info

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
Application number
JP2726379A
Other languages
Japanese (ja)
Inventor
Nobuo Toyama
Junichi Yoshida
Kazuhiro Horiuchi
Ritsu Katsuoka
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.)
Ricoh Elemex Corp
Ricoh Co Ltd
Original Assignee
Ricoh Elemex Corp
Ricoh Co Ltd
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 Ricoh Elemex Corp, Ricoh Co Ltd filed Critical Ricoh Elemex Corp
Priority to JP2726379A priority Critical patent/JPS55121181A/en
Publication of JPS55121181A publication Critical patent/JPS55121181A/en
Pending legal-status Critical Current

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.
JP2726379A 1979-03-10 1979-03-10 Electronic watch Pending JPS55121181A (en)

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)

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