JPS5724877A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS5724877A
JPS5724877A JP9941280A JP9941280A JPS5724877A JP S5724877 A JPS5724877 A JP S5724877A JP 9941280 A JP9941280 A JP 9941280A JP 9941280 A JP9941280 A JP 9941280A JP S5724877 A JPS5724877 A JP S5724877A
Authority
JP
Japan
Prior art keywords
driving
rotor
circuit
coil
step motor
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
JP9941280A
Other languages
Japanese (ja)
Inventor
Tatsuo Nitta
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 Watch Co Ltd
Original Assignee
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 Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP9941280A priority Critical patent/JPS5724877A/en
Publication of JPS5724877A publication Critical patent/JPS5724877A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Stepping Motors (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To reduce the power consumption by always driving a step motor with the minimum energy through control of the time in the application of driving power according to information on the rotating position of a rotor. CONSTITUTION:Current flowing through a coil 4 of a step motor 15 is detected with a detection element 16A. Then, a voltage controlling/amplifying circuit 16 B amplifies and computes the coil current detected to detect the information on the rotating position of a rotor 1 of the motor 15. Detecting the rotor 1 rotating over a fixed angle of rotation, a controlling circuit 16C controls the output of a driving signal preparing circuit 13 thereby prohibiting the application of a driving current to a coil 4 of a driving circuit 14. This enables the driving of the step motor 15 with the minimum energy thereby reducing the power consumption.
JP9941280A 1980-07-22 1980-07-22 Electronic watch Pending JPS5724877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9941280A JPS5724877A (en) 1980-07-22 1980-07-22 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9941280A JPS5724877A (en) 1980-07-22 1980-07-22 Electronic watch

Publications (1)

Publication Number Publication Date
JPS5724877A true JPS5724877A (en) 1982-02-09

Family

ID=14246758

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9941280A Pending JPS5724877A (en) 1980-07-22 1980-07-22 Electronic watch

Country Status (1)

Country Link
JP (1) JPS5724877A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015084633A (en) * 2013-09-20 2015-04-30 カシオ計算機株式会社 Stepping motor and clock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015084633A (en) * 2013-09-20 2015-04-30 カシオ計算機株式会社 Stepping motor and clock

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