JPS57119278A - Power source device for electronic watch - Google Patents

Power source device for electronic watch

Info

Publication number
JPS57119278A
JPS57119278A JP56005563A JP556381A JPS57119278A JP S57119278 A JPS57119278 A JP S57119278A JP 56005563 A JP56005563 A JP 56005563A JP 556381 A JP556381 A JP 556381A JP S57119278 A JPS57119278 A JP S57119278A
Authority
JP
Japan
Prior art keywords
voltage
power source
output
electronic watch
capacitor
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
JP56005563A
Other languages
Japanese (ja)
Inventor
Shingo Ichikawa
Fuminori Suzuki
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.)
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Holdings Co Ltd
Citizen Watch 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 Citizen Holdings Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Holdings Co Ltd
Priority to JP56005563A priority Critical patent/JPS57119278A/en
Publication of JPS57119278A publication Critical patent/JPS57119278A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
    • G04G19/02—Conversion or regulation of current or voltage
    • G04G19/04—Capacitive voltage division or multiplication

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

PURPOSE:To enable lengthening of a life of a power source cell for an electronic watch, by a method wherein an output voltage in a normally specific step- down voltage range can be obtained by controlling charging and discharging of a capacitor for stepping-down a power source cell voltage corresponding to a step-down voltage output. CONSTITUTION:If a point of a step-down voltage circuit 8 changes to a low- level, FET S2 and S4 of switching circuits 21 and 22 are brought to ON via inverters 25 and 26, and a capacitor 23 discharges to generate a step-down voltage VO, being 1/2 a charging voltage, by a cell 7. The voltage VO is applied to a gate of an FET 31 of a voltage detecting circuit 9 and a clock terminal of a D type FF 32. If the voltage VO is below a given voltage, an output of an FF 32 inverts to a high level, and the point G attains a high level to bring the capacitor 23 into a charging condition. This obtains an output voltage in a normally specified voltage range, and permits lengthening of a life of a power source cell of an electronic watch.
JP56005563A 1981-01-17 1981-01-17 Power source device for electronic watch Pending JPS57119278A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56005563A JPS57119278A (en) 1981-01-17 1981-01-17 Power source device for electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56005563A JPS57119278A (en) 1981-01-17 1981-01-17 Power source device for electronic watch

Publications (1)

Publication Number Publication Date
JPS57119278A true JPS57119278A (en) 1982-07-24

Family

ID=11614666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56005563A Pending JPS57119278A (en) 1981-01-17 1981-01-17 Power source device for electronic watch

Country Status (1)

Country Link
JP (1) JPS57119278A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61161483A (en) * 1985-01-10 1986-07-22 Seiko Epson Corp Electronic timepiece
JPS61286785A (en) * 1985-03-29 1986-12-17 Seiko Epson Corp Electronic timepiece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61161483A (en) * 1985-01-10 1986-07-22 Seiko Epson Corp Electronic timepiece
JPS61286785A (en) * 1985-03-29 1986-12-17 Seiko Epson Corp Electronic timepiece

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