JPS57118181A - Alarm electronic wristwatch - Google Patents

Alarm electronic wristwatch

Info

Publication number
JPS57118181A
JPS57118181A JP340181A JP340181A JPS57118181A JP S57118181 A JPS57118181 A JP S57118181A JP 340181 A JP340181 A JP 340181A JP 340181 A JP340181 A JP 340181A JP S57118181 A JPS57118181 A JP S57118181A
Authority
JP
Japan
Prior art keywords
signal
speaker
chopping
goes
alarm
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
JP340181A
Other languages
Japanese (ja)
Inventor
Ichiro Horikoshi
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 JP340181A priority Critical patent/JPS57118181A/en
Publication of JPS57118181A publication Critical patent/JPS57118181A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G13/00—Producing acoustic time signals
    • G04G13/02—Producing acoustic time signals at preselected times, e.g. alarm clocks
    • G04G13/021—Details

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To make a speaker for a silver battery usable as a speaker of an alarm electroninc wristwatch mounted with an Li battery by using the output signal ANDed from an audible frequency signal and a chopping signal as a speaker driving signal. CONSTITUTION:When a signal D ANDed 11 from a signal A of 32768Hz for chopping and a signal B of 4096Hz of an alarm sound reference signal attains an alarm time, it is applied to the base of a transistor 13 driving a speaker 10. When the signal for chopping is of 32768Hz, the TR 13 goes off, and the electric current stored in the coil of the speaker 10 flows through a diode 14, and before the current goes 0, the TR 13 goes on again and therefore the efficiency is improved.
JP340181A 1981-01-13 1981-01-13 Alarm electronic wristwatch Pending JPS57118181A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP340181A JPS57118181A (en) 1981-01-13 1981-01-13 Alarm electronic wristwatch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP340181A JPS57118181A (en) 1981-01-13 1981-01-13 Alarm electronic wristwatch

Publications (1)

Publication Number Publication Date
JPS57118181A true JPS57118181A (en) 1982-07-22

Family

ID=11556345

Family Applications (1)

Application Number Title Priority Date Filing Date
JP340181A Pending JPS57118181A (en) 1981-01-13 1981-01-13 Alarm electronic wristwatch

Country Status (1)

Country Link
JP (1) JPS57118181A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60238854A (en) * 1984-05-11 1985-11-27 Fuji Xerox Co Ltd Alarm buzzer driving circuit of electronic copying machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60238854A (en) * 1984-05-11 1985-11-27 Fuji Xerox Co Ltd Alarm buzzer driving circuit of electronic copying machine

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