FR2426999B1 - - Google Patents

Info

Publication number
FR2426999B1
FR2426999B1 FR7911601A FR7911601A FR2426999B1 FR 2426999 B1 FR2426999 B1 FR 2426999B1 FR 7911601 A FR7911601 A FR 7911601A FR 7911601 A FR7911601 A FR 7911601A FR 2426999 B1 FR2426999 B1 FR 2426999B1
Authority
FR
France
Prior art keywords
magnetic field
driving coil
closed loop
resistance element
impedance closed
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.)
Expired
Application number
FR7911601A
Other languages
English (en)
Other versions
FR2426999A1 (fr
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
Publication of FR2426999A1 publication Critical patent/FR2426999A1/fr
Application granted granted Critical
Publication of FR2426999B1 publication Critical patent/FR2426999B1/fr
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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0064—Visual time or date indication means in which functions not related to time can be displayed

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measuring Magnetic Variables (AREA)
FR7911601A 1978-05-26 1979-05-08 Dispositif de detection de champ magnetique externe pour une montre electronique Granted FR2426999A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6299678A JPS54155079A (en) 1978-05-26 1978-05-26 Magnetic field detector for electronic watch

Publications (2)

Publication Number Publication Date
FR2426999A1 FR2426999A1 (fr) 1979-12-21
FR2426999B1 true FR2426999B1 (fr) 1983-08-19

Family

ID=13216483

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7911601A Granted FR2426999A1 (fr) 1978-05-26 1979-05-08 Dispositif de detection de champ magnetique externe pour une montre electronique

Country Status (6)

Country Link
US (1) US4321519A (fr)
JP (1) JPS54155079A (fr)
CH (1) CH634964B (fr)
DE (1) DE2920894C2 (fr)
FR (1) FR2426999A1 (fr)
GB (1) GB2023891B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5515054A (en) * 1978-07-19 1980-02-01 Seiko Instr & Electronics Ltd Electronic watch
US4321521A (en) * 1978-12-25 1982-03-23 Kabushiki Kaisha Daini Seikosha Detection device of electronic timepiece
JPS55147381A (en) * 1979-05-04 1980-11-17 Seiko Instr & Electronics Ltd Detector for electronic watch
GB2134290B (en) * 1982-12-16 1986-02-26 Suwa Seikosha Kk An analog electronic timepiece
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
US5600611A (en) * 1995-10-04 1997-02-04 Timex Corporation Wrist mountable compass
JP3508444B2 (ja) * 1997-02-07 2004-03-22 セイコーエプソン株式会社 ステッピングモーターの制御装置、その制御方法および計時装置
JP3440938B2 (ja) * 1998-12-14 2003-08-25 セイコーエプソン株式会社 電子機器および電子機器の制御方法
JP3395786B1 (ja) * 2002-02-26 2003-04-14 セイコーエプソン株式会社 電子機器、電子機器の受信制御方法および電子機器の受信制御プログラム
JP5711910B2 (ja) * 2010-07-29 2015-05-07 セミコンダクター・コンポーネンツ・インダストリーズ・リミテッド・ライアビリティ・カンパニー モータ駆動回路
EP2993534A1 (fr) * 2014-09-05 2016-03-09 EM Microelectronic-Marin SA Circuit détecteur de chocs
EP3171231B1 (fr) 2015-11-18 2018-06-06 ETA SA Manufacture Horlogère Suisse Circuit detecteur de chocs et son procede de fonctionnement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756010A (en) * 1970-08-11 1973-09-04 Matsushita Electric Works Ltd Magnetic-induction clock
US4158287A (en) * 1976-08-12 1979-06-19 Citizen Watch Company Limited Driver circuit for electro-mechanical transducer

Also Published As

Publication number Publication date
JPS6120821B2 (fr) 1986-05-23
GB2023891B (en) 1982-09-15
CH634964B (fr)
DE2920894A1 (de) 1979-11-29
US4321519A (en) 1982-03-23
FR2426999A1 (fr) 1979-12-21
DE2920894C2 (de) 1983-10-13
GB2023891A (en) 1980-01-03
CH634964GA3 (fr) 1983-03-15
JPS54155079A (en) 1979-12-06

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Legal Events

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