CH646574GA3 - - Google Patents

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Publication number
CH646574GA3
CH646574GA3 CH538880A CH538880A CH646574GA3 CH 646574G A3 CH646574G A3 CH 646574GA3 CH 538880 A CH538880 A CH 538880A CH 538880 A CH538880 A CH 538880A CH 646574G A3 CH646574G A3 CH 646574GA3
Authority
CH
Switzerland
Prior art keywords
circuit
power source
supply voltage
stepping motor
variation
Prior art date
Application number
CH538880A
Other languages
French (fr)
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 filed Critical
Publication of CH646574GA3 publication Critical patent/CH646574GA3/fr

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
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00—Arrangements of electric power supplies in time-pieces
    • G04C10/02—Arrangements of electric power supplies in time-pieces the power supply being a radioactive or photovoltaic source
    • 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)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)
  • Electric Clocks (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

An electronic timepiece having a stepping motor includes a power source, an oscillating circuit, a dividing circuit connected to the oscillating circuit, and a wave shaping circuit receptive of a plurality of output signals produced from the dividing circuit to produce a plurality of controlling signals. A controlling circuit receives the controlling signals and controls a driving circuit. The power source is connected to a detecting voltage circuit by which the variation of the supply voltage of the power source is detected, and a normal waveform or an intermittent waveform is selectively applied to the stepping motor according to the variation of the supply voltage. As a result, the power consumption of the steppng motor is controlled at a constant level, even if the supply voltage of the power source is higher than the optimum voltage of the stepping motor and even if the supply voltage varies.
CH538880A 1979-07-13 1980-07-14 CH646574GA3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8900879A JPS5612577A (en) 1979-07-13 1979-07-13 Electronic clock

Publications (1)

Publication Number Publication Date
CH646574GA3 true CH646574GA3 (en) 1984-12-14

Family

ID=13958820

Family Applications (1)

Application Number Title Priority Date Filing Date
CH538880A CH646574GA3 (en) 1979-07-13 1980-07-14

Country Status (8)

Country Link
US (1) US4437769A (en)
JP (1) JPS5612577A (en)
CH (1) CH646574GA3 (en)
DE (1) DE3026321A1 (en)
FR (1) FR2461400A1 (en)
GB (1) GB2054916B (en)
HK (1) HK64686A (en)
SG (1) SG21684G (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5643575A (en) * 1979-09-18 1981-04-22 Seiko Instr & Electronics Ltd Electronic clock
CH632383B (en) * 1980-04-16 Ebauchesfabrik Eta Ag ELECTRONIC WATCH PART.
CH647383GA3 (en) * 1981-02-04 1985-01-31
JPS5866090A (en) * 1981-10-15 1983-04-20 Seikosha Co Ltd Electronic time piece
JPS5980147A (en) * 1982-10-29 1984-05-09 Rhythm Watch Co Ltd Small motor for timepiece
GB2156172B (en) * 1984-03-19 1988-11-02 Westinghouse Electric Corp Stepper motor torque control apparatus and method
JPS6189625A (en) * 1984-10-09 1986-05-07 Canon Inc Formation of deposited film
JPS6190423A (en) * 1984-10-10 1986-05-08 Canon Inc Deposited film formation method
JPS61164184A (en) * 1985-01-17 1986-07-24 Seiko Instr & Electronics Ltd Electronic metronome
JPS61165965U (en) * 1985-04-05 1986-10-15
CH671135GA3 (en) * 1987-12-11 1989-08-15 Control method for stepper motor - using magnetic field detector allowing compensation for ambient magnetic field by adjusting drive pulses
DE69621392T2 (en) * 1995-09-20 2003-01-09 Citizen Watch Co., Ltd. Electronic clock
JP2946091B2 (en) 1998-02-18 1999-09-06 セイコーインスツルメンツ株式会社 Switching regulator
JP3678075B2 (en) * 1998-12-09 2005-08-03 セイコーエプソン株式会社 Power supply device and control method thereof, portable electronic device, timing device and control method thereof

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150536A (en) 1976-01-28 1979-04-24 Citizen Watch Company Limited Electronic timepiece
US4129981A (en) 1976-02-06 1978-12-19 Citizen Watch Company Limited Electronic timepiece
JPS5345575A (en) 1976-10-06 1978-04-24 Seiko Epson Corp Electronic wristwatch
US4107595A (en) 1977-01-24 1978-08-15 Teletype Corporation Current control system for a stepping motor
JPS53132384A (en) 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
US4140955A (en) 1977-05-12 1979-02-20 Fluke Trendar Corporation Stepping motor drive method and apparatus
GB2006995B (en) 1977-09-26 1982-11-17 Citizen Watch Co Ltd Drive system for pulse motor
DE2749141A1 (en) 1977-11-03 1979-05-10 Quarz Zeit Ag ELECTRIC CLOCK
CH616044B (en) 1977-12-16 Bulova Watch Co Inc ELECTRONIC CLOCK.
US4230970A (en) 1978-03-07 1980-10-28 Lear Siegler, Inc. Method and apparatus for saving energy
CH616045B (en) 1978-06-20 Ebauches Sa PROCESS FOR REDUCING THE CONSUMPTION OF AN ELECTRONIC WATCH PART AND ELECTRONIC WATCH PART IMPLEMENTING THIS PROCESS.
US4295083A (en) 1979-07-02 1981-10-13 The Superior Electric Company Pulsed energy stepping motor power control unit
US4326161A (en) 1979-10-17 1982-04-20 Protection Services, Inc. Battery regulation circuit

Also Published As

Publication number Publication date
US4437769A (en) 1984-03-20
FR2461400A1 (en) 1981-01-30
FR2461400B1 (en) 1984-11-30
JPS5612577A (en) 1981-02-06
DE3026321A1 (en) 1981-01-29
HK64686A (en) 1986-09-05
SG21684G (en) 1990-07-06
GB2054916A (en) 1981-02-18
GB2054916B (en) 1983-03-16

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