JPS5640779A - Over charging preventing circuit for electronic watch - Google Patents

Over charging preventing circuit for electronic watch

Info

Publication number
JPS5640779A
JPS5640779A JP11695379A JP11695379A JPS5640779A JP S5640779 A JPS5640779 A JP S5640779A JP 11695379 A JP11695379 A JP 11695379A JP 11695379 A JP11695379 A JP 11695379A JP S5640779 A JPS5640779 A JP S5640779A
Authority
JP
Japan
Prior art keywords
electronic watch
over charging
preventing circuit
voltage
charging preventing
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
JP11695379A
Other languages
Japanese (ja)
Inventor
Makoto Ueda
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 JP11695379A priority Critical patent/JPS5640779A/en
Publication of JPS5640779A publication Critical patent/JPS5640779A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00—Arrangements of electric power supplies in time pieces
    • G04C10/02—Arrangements of electric power supplies in time pieces the power supply being a radioactive or photovoltaic source

Abstract

PURPOSE:To make unnecessary the separate provision of breeder resistor, by using the step motor as the breeder resistor to prevent over charging of the secondary cell charged with the solar cell. CONSTITUTION:The voltage detection circuit 5 detecting the voltage of the battery 2 is operated with the timing pulse 20, and when the voltage of the cell 2 is higher than the reference, the output of the AND gate 10 is at H level and the power generated with the solar cell 1 consumed in the step motor 18 to prevent the over charge.
JP11695379A 1979-09-12 1979-09-12 Over charging preventing circuit for electronic watch Pending JPS5640779A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11695379A JPS5640779A (en) 1979-09-12 1979-09-12 Over charging preventing circuit for electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11695379A JPS5640779A (en) 1979-09-12 1979-09-12 Over charging preventing circuit for electronic watch

Publications (1)

Publication Number Publication Date
JPS5640779A true JPS5640779A (en) 1981-04-17

Family

ID=14699815

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11695379A Pending JPS5640779A (en) 1979-09-12 1979-09-12 Over charging preventing circuit for electronic watch

Country Status (1)

Country Link
JP (1) JPS5640779A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62238485A (en) * 1986-04-09 1987-10-19 Seiko Epson Corp Electronic timepiece

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62238485A (en) * 1986-04-09 1987-10-19 Seiko Epson Corp Electronic timepiece

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