JPS5389771A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS5389771A
JPS5389771A JP427177A JP427177A JPS5389771A JP S5389771 A JPS5389771 A JP S5389771A JP 427177 A JP427177 A JP 427177A JP 427177 A JP427177 A JP 427177A JP S5389771 A JPS5389771 A JP S5389771A
Authority
JP
Japan
Prior art keywords
electronic watch
main battery
memoryfrom
exchanging
drop
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
JP427177A
Other languages
Japanese (ja)
Inventor
Nihiro Teraishi
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 Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP427177A priority Critical patent/JPS5389771A/en
Publication of JPS5389771A publication Critical patent/JPS5389771A/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
    • G04G19/10—Arrangements for supplying back-up power

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To prevent the functions of electronic circuits including volatile semiconductor memoryfrom stopping even at the drop of power source voltage or exchanging of a main battery by using an auxiliary battery charged by the main battery.
JP427177A 1977-01-18 1977-01-18 Electronic watch Pending JPS5389771A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP427177A JPS5389771A (en) 1977-01-18 1977-01-18 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP427177A JPS5389771A (en) 1977-01-18 1977-01-18 Electronic watch

Publications (1)

Publication Number Publication Date
JPS5389771A true JPS5389771A (en) 1978-08-07

Family

ID=11579869

Family Applications (1)

Application Number Title Priority Date Filing Date
JP427177A Pending JPS5389771A (en) 1977-01-18 1977-01-18 Electronic watch

Country Status (1)

Country Link
JP (1) JPS5389771A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0629898A (en) * 1992-07-09 1994-02-04 Nec Corp Portable telephone set

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0629898A (en) * 1992-07-09 1994-02-04 Nec Corp Portable telephone set

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