JPS5452574A - Electronic wristwatch - Google Patents

Electronic wristwatch

Info

Publication number
JPS5452574A
JPS5452574A JP11885477A JP11885477A JPS5452574A JP S5452574 A JPS5452574 A JP S5452574A JP 11885477 A JP11885477 A JP 11885477A JP 11885477 A JP11885477 A JP 11885477A JP S5452574 A JPS5452574 A JP S5452574A
Authority
JP
Japan
Prior art keywords
battery
circuit
terminal voltage
output
voltage
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
JP11885477A
Other languages
Japanese (ja)
Inventor
Kiichi Kawamura
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 JP11885477A priority Critical patent/JPS5452574A/en
Publication of JPS5452574A publication Critical patent/JPS5452574A/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
    • G04C10/04—Arrangements of electric power supplies in time pieces with means for indicating the condition of the power supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Secondary Cells (AREA)

Abstract

PURPOSE:To know the discharge condition of a battery by applying extremely heavier load than the load under normal use of the battery or by charging with extremely large current to observe the change in battery terminal voltage in a very short time. CONSTITUTION:When a measurement start switch 103 is closed, a signal is delivered 0.5 seconds later from an auto-trigger circuit 105 to trigger a timing circuit 106, which causes the terminal voltage of battery being measured 101 to change suddenly. This changing voltage is stored in a sample hold circuit 109. The difference between the output of the sample hold circuit 109 and the terminal voltage of the battery 101 is calculated in a subtraction amplifier circuit 110, of which output is compared with the reference voltage of a reference voltage generation circuit 117 in a comparator circuit 111. And the output of latch circuit 127 tells the difference of terminal voltage of the battery 101 being rapid discharging measurements taken 10 msec later and 5 sec later after initiating discharging of the battery 101. Accordingly, the discharge condition of the battery can be known.
JP11885477A 1977-10-03 1977-10-03 Electronic wristwatch Pending JPS5452574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11885477A JPS5452574A (en) 1977-10-03 1977-10-03 Electronic wristwatch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11885477A JPS5452574A (en) 1977-10-03 1977-10-03 Electronic wristwatch

Publications (1)

Publication Number Publication Date
JPS5452574A true JPS5452574A (en) 1979-04-25

Family

ID=14746774

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11885477A Pending JPS5452574A (en) 1977-10-03 1977-10-03 Electronic wristwatch

Country Status (1)

Country Link
JP (1) JPS5452574A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5559377A (en) * 1978-10-28 1980-05-02 Seiko Instr & Electronics Ltd Electronic watch
JPS5662590U (en) * 1979-10-19 1981-05-27

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5559377A (en) * 1978-10-28 1980-05-02 Seiko Instr & Electronics Ltd Electronic watch
JPS5662590U (en) * 1979-10-19 1981-05-27

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