JPS5587978A - Device for detecting electronic watch - Google Patents

Device for detecting electronic watch

Info

Publication number
JPS5587978A
JPS5587978A JP16151178A JP16151178A JPS5587978A JP S5587978 A JPS5587978 A JP S5587978A JP 16151178 A JP16151178 A JP 16151178A JP 16151178 A JP16151178 A JP 16151178A JP S5587978 A JPS5587978 A JP S5587978A
Authority
JP
Japan
Prior art keywords
rotation
resistors
detecting
power supply
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
JP16151178A
Other languages
Japanese (ja)
Inventor
Jun Ueda
Akira Torisawa
Shuji Otawa
Masaaki Bandai
Masaharu Shida
Katsuhiko Sato
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 JP16151178A priority Critical patent/JPS5587978A/en
Publication of JPS5587978A publication Critical patent/JPS5587978A/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)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

PURPOSE:To reduce the power consumption of a detecting circuit for detecting the rotation or non-rotation of the rotor of a step motor by setting the operation of the detecting circuit at predetermined time of the duration of one period of a commercial power supply. CONSTITUTION:There are provided detection resistors and N gate for switching the resistors at both ends of a drive coil of a step motor to detect the rotation or non- rotation of the step motor. The voltages 8a, 8b generated at both ends of the coil are compared with standard voltage divided via resistors 85, 86 from the voltage of a power supply. The N gate 87 connected in series with the resistors 85, 86 is inserted to prevent a current from flowing through the resistors except when detecting the operation of the motor. These circuits for detecting the rotation or non-rotation of the rotor become operating state only for 20-30msec as a time when the maximum amplitude of one period of the voltage from the commercial power supply is applied thereto to thereby reduce the power consumption thereof.
JP16151178A 1978-12-26 1978-12-26 Device for detecting electronic watch Pending JPS5587978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16151178A JPS5587978A (en) 1978-12-26 1978-12-26 Device for detecting electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16151178A JPS5587978A (en) 1978-12-26 1978-12-26 Device for detecting electronic watch

Publications (1)

Publication Number Publication Date
JPS5587978A true JPS5587978A (en) 1980-07-03

Family

ID=15736444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16151178A Pending JPS5587978A (en) 1978-12-26 1978-12-26 Device for detecting electronic watch

Country Status (1)

Country Link
JP (1) JPS5587978A (en)

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