HK142594A - Stepper motor control circuit, especially for watches - Google Patents

Stepper motor control circuit, especially for watches

Info

Publication number
HK142594A
HK142594A HK142594A HK142594A HK142594A HK 142594 A HK142594 A HK 142594A HK 142594 A HK142594 A HK 142594A HK 142594 A HK142594 A HK 142594A HK 142594 A HK142594 A HK 142594A
Authority
HK
Hong Kong
Prior art keywords
voltage
control circuit
pulses
watches
motor control
Prior art date
Application number
HK142594A
Other languages
English (en)
Inventor
Yves Guerin
Original Assignee
Ebauchesfabrik Eta Ag
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 Ebauchesfabrik Eta Ag filed Critical Ebauchesfabrik Eta Ag
Publication of HK142594A publication Critical patent/HK142594A/xx

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)
HK142594A 1988-02-12 1994-12-15 Stepper motor control circuit, especially for watches HK142594A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH513/88A CH672043B5 (xx) 1988-02-12 1988-02-12

Publications (1)

Publication Number Publication Date
HK142594A true HK142594A (en) 1994-12-23

Family

ID=4188724

Family Applications (1)

Application Number Title Priority Date Filing Date
HK142594A HK142594A (en) 1988-02-12 1994-12-15 Stepper motor control circuit, especially for watches

Country Status (5)

Country Link
EP (1) EP0327989B1 (xx)
JP (1) JP2905856B2 (xx)
CH (1) CH672043B5 (xx)
DE (1) DE68900226D1 (xx)
HK (1) HK142594A (xx)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0704774B1 (en) * 1994-04-06 1999-08-25 Citizen Watch Co., Ltd. Electronic timepiece
JP5265821B1 (ja) 2013-01-28 2013-08-14 日本食品化工株式会社 油脂加工澱粉およびその製造方法
JP7066361B2 (ja) * 2017-09-21 2022-05-13 セイコーインスツル株式会社 時計、電子機器、および時計の制御方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2944872C2 (de) * 1979-11-07 1981-11-19 Gebrüder Junghans GmbH, 7230 Schramberg Anordnung zur Steuerung eines Schrittmotors für batteriebetriebene Geräte
JPS5676078A (en) * 1979-11-28 1981-06-23 Citizen Watch Co Ltd Circuit for electronic time piece
US4383209A (en) * 1980-10-15 1983-05-10 Minnesota Mining And Manufacturing Company Control system for transducer positioning motor
JPS5979886A (ja) * 1982-10-29 1984-05-09 Rhythm Watch Co Ltd 時計のモ−タ駆動回路
CH653206GA3 (xx) * 1983-09-16 1985-12-31

Also Published As

Publication number Publication date
CH672043GA3 (xx) 1989-10-31
CH672043B5 (xx) 1990-04-30
JP2905856B2 (ja) 1999-06-14
JPH01243891A (ja) 1989-09-28
EP0327989A1 (fr) 1989-08-16
DE68900226D1 (de) 1991-10-02
EP0327989B1 (fr) 1991-08-28

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Legal Events

Date Code Title Description
PF Patent in force
PE Patent expired

Effective date: 20090202