JPS5587976A - Device for detecting electronic watch - Google Patents

Device for detecting electronic watch

Info

Publication number
JPS5587976A
JPS5587976A JP16150978A JP16150978A JPS5587976A JP S5587976 A JPS5587976 A JP S5587976A JP 16150978 A JP16150978 A JP 16150978A JP 16150978 A JP16150978 A JP 16150978A JP S5587976 A JPS5587976 A JP S5587976A
Authority
JP
Japan
Prior art keywords
gate
rotation
coil
electronic watch
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.)
Granted
Application number
JP16150978A
Other languages
Japanese (ja)
Other versions
JPS6262307B2 (en
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 and Electronics 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 Seiko Instruments and Electronics Ltd filed Critical Seiko Instruments and Electronics Ltd
Priority to JP16150978A priority Critical patent/JPS5587976A/en
Priority to US06/100,222 priority patent/US4321521A/en
Priority to GB7942565A priority patent/GB2038512A/en
Priority to CH1143279A priority patent/CH639235B/en
Priority to DE19792951947 priority patent/DE2951947A1/en
Priority to FR7931591A priority patent/FR2445653A1/en
Publication of JPS5587976A publication Critical patent/JPS5587976A/en
Publication of JPS6262307B2 publication Critical patent/JPS6262307B2/ja
Granted 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 and size of an electronic watch by constructing a detector for detecting the rotation or non-rotation of the rotor of a step motor of at least one high impedance element, a voltage comparator and a standard voltage unit. CONSTITUTION:There are provided a detection resistor for detecting the rotation or non-rotation of the rotor of a step motor and an N gate 87 for switching the resistor at both ends of a coil for driving the motor. Comparators 83, 84 compare the voltages 8a, 8b generated at both ends of the coil with standard voltage divided via resistors 85, 86 from the voltage from a power supply to apply the outputs to an OR gate 88 and to one input of an AND gate 89. A signal from a terminal 107 is also applied to the other input of the AND gate 89, which thereupon produces the detected output. The detection resistor has resistance higher than five times the resistance of the coil as a high impedance element internally contained as a diffusion resistor in an IC for containing a watch circuit to thus construct the elements readily contained in the IC except for the step motor. Thus, it can reduce the power consumption and size of the electronic watch.
JP16150978A 1978-12-25 1978-12-26 Device for detecting electronic watch Granted JPS5587976A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP16150978A JPS5587976A (en) 1978-12-26 1978-12-26 Device for detecting electronic watch
US06/100,222 US4321521A (en) 1978-12-25 1979-12-04 Detection device of electronic timepiece
GB7942565A GB2038512A (en) 1978-12-25 1979-12-10 Stepping motor driven electronic timepieces
CH1143279A CH639235B (en) 1978-12-25 1979-12-21 ROTATION / NON-ROTATION DETECTION AND CORRECTIVE PULSES PRODUCTION DEVICE, FOR ELECTRONIC WATCH PART, ESPECIALLY FOR ELECTRONIC BRACELET WATCHES.
DE19792951947 DE2951947A1 (en) 1978-12-25 1979-12-22 DRIVING CIRCUIT FOR A STEPPER MOTOR OF AN ELECTRIC WATCH
FR7931591A FR2445653A1 (en) 1978-12-25 1979-12-24 DETECTION DEVICE FOR AN ELECTRONIC WATCH

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16150978A JPS5587976A (en) 1978-12-26 1978-12-26 Device for detecting electronic watch

Publications (2)

Publication Number Publication Date
JPS5587976A true JPS5587976A (en) 1980-07-03
JPS6262307B2 JPS6262307B2 (en) 1987-12-25

Family

ID=15736403

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16150978A Granted JPS5587976A (en) 1978-12-25 1978-12-26 Device for detecting electronic watch

Country Status (1)

Country Link
JP (1) JPS5587976A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5341270A (en) * 1976-09-27 1978-04-14 Seiko Epson Corp Electronic wristwatch
JPS53132171A (en) * 1977-04-22 1978-11-17 Kobe Steel Ltd Process for wastewater treatment
JPS5587076A (en) * 1978-12-25 1980-07-01 Seiko Instr & Electronics Ltd Electronic watch
JPS5587077A (en) * 1978-12-25 1980-07-01 Seiko Instr & Electronics Ltd Detector for electronic watch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5341270A (en) * 1976-09-27 1978-04-14 Seiko Epson Corp Electronic wristwatch
JPS53132171A (en) * 1977-04-22 1978-11-17 Kobe Steel Ltd Process for wastewater treatment
JPS5587076A (en) * 1978-12-25 1980-07-01 Seiko Instr & Electronics Ltd Electronic watch
JPS5587077A (en) * 1978-12-25 1980-07-01 Seiko Instr & Electronics Ltd Detector for electronic watch

Also Published As

Publication number Publication date
JPS6262307B2 (en) 1987-12-25

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