CH635973GA3 - - Google Patents
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- Publication number
- CH635973GA3 CH635973GA3 CH53178A CH53178A CH635973GA3 CH 635973G A3 CH635973G A3 CH 635973GA3 CH 53178 A CH53178 A CH 53178A CH 53178 A CH53178 A CH 53178A CH 635973G A3 CH635973G A3 CH 635973GA3
- Authority
- CH
- Switzerland
- Prior art keywords
- load detection
- step motor
- driving
- load
- circuitry
- Prior art date
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)
- Telephone Function (AREA)
- Control Of Stepping Motors (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP472877A JPS5389776A (en) | 1977-01-19 | 1977-01-19 | Electronic wristwatch |
JP846577A JPS5394981A (en) | 1977-01-28 | 1977-01-28 | Electronic wristwatch |
Publications (2)
Publication Number | Publication Date |
---|---|
CH635973B CH635973B (fr) | |
CH635973GA3 true CH635973GA3 (ja) | 1983-05-13 |
Family
ID=26338546
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH53178A CH635973B (fr) | 1977-01-19 | 1978-01-18 | Circuit de commande pour un transducteur electromecanique d'une montre, notamment d'une montre-bracelet electronique. |
Country Status (2)
Country | Link |
---|---|
US (1) | US4192131A (ja) |
CH (1) | CH635973B (ja) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4321521A (en) * | 1978-12-25 | 1982-03-23 | Kabushiki Kaisha Daini Seikosha | Detection device of electronic timepiece |
US4351039A (en) * | 1979-01-08 | 1982-09-21 | Jean-Claude Berney | Timepiece with a detector and control circuit for a stepping motor |
US4282472A (en) * | 1979-05-14 | 1981-08-04 | Qwint Systems, Inc. | Digital generation and control of variable phase-on motor energization |
FR2464478A1 (fr) * | 1979-09-04 | 1981-03-06 | Suisse Horlogerie | Detecteur d'avance d'un moteur pas a pas |
DE2944872C2 (de) * | 1979-11-07 | 1981-11-19 | Gebrüder Junghans GmbH, 7230 Schramberg | Anordnung zur Steuerung eines Schrittmotors für batteriebetriebene Geräte |
JPS56110073A (en) * | 1980-02-05 | 1981-09-01 | Citizen Watch Co Ltd | Electronic watch |
US4329635A (en) * | 1980-09-03 | 1982-05-11 | Gould Inc. | Stepper motor damping circuit |
CH644989GA3 (ja) * | 1981-03-18 | 1984-09-14 | ||
CH646575GA3 (ja) * | 1981-10-02 | 1984-12-14 | ||
US4506206A (en) * | 1982-01-21 | 1985-03-19 | U.S. Philips Corporation | Method of and circuit arrangement for controlling the torque of a stepping motor |
NL8203094A (nl) * | 1982-08-04 | 1984-03-01 | Philips Nv | Werkwijze voor het analyseren van de in een bekrachtigingsspoel van een stappenmotor geinduceerde spanning. |
US4888541A (en) * | 1987-10-23 | 1989-12-19 | Jack Russell | Method and apparatus for controlling stepmotor mechanical drives |
US4851755A (en) * | 1988-03-01 | 1989-07-25 | Ampex Corporation | Low power stepper motor drive system and method |
EP0764894B1 (en) * | 1995-09-20 | 2002-05-29 | Citizen Watch Co., Ltd. | Electronic watch |
JP2010220408A (ja) * | 2009-03-17 | 2010-09-30 | Seiko Instruments Inc | ステッピングモータ制御回路及びアナログ電子時計 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1343330A (en) * | 1970-07-27 | 1974-01-10 | Suwa Seikosha Kk | Electric timepieces |
JPS5319944B2 (ja) * | 1971-09-25 | 1978-06-23 | ||
CH592908B5 (ja) * | 1975-09-09 | 1977-11-15 | Ebauches Sa | |
US4032827A (en) * | 1976-03-15 | 1977-06-28 | Timex Corporation | Driver circuit arrangement for a stepping motor |
US4158287A (en) * | 1976-08-12 | 1979-06-19 | Citizen Watch Company Limited | Driver circuit for electro-mechanical transducer |
-
1978
- 1978-01-18 CH CH53178A patent/CH635973B/fr unknown
- 1978-01-19 US US05/870,957 patent/US4192131A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US4192131A (en) | 1980-03-11 |
CH635973B (fr) |
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