HK142594A - Stepper motor control circuit, especially for watches - Google Patents
Stepper motor control circuit, especially for watchesInfo
- 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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69511649T2 (de) * | 1994-04-06 | 2000-04-06 | Citizen Watch Co., Ltd. | Elektronische uhr |
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)
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 |
-
1988
- 1988-02-12 CH CH513/88A patent/CH672043B5/fr not_active IP Right Cessation
-
1989
- 1989-02-03 DE DE8989101879T patent/DE68900226D1/de not_active Expired - Lifetime
- 1989-02-03 EP EP89101879A patent/EP0327989B1/fr not_active Expired - Lifetime
- 1989-02-13 JP JP1031250A patent/JP2905856B2/ja not_active Expired - Lifetime
-
1994
- 1994-12-15 HK HK142594A patent/HK142594A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CH672043GA3 (xx) | 1989-10-31 |
DE68900226D1 (de) | 1991-10-02 |
CH672043B5 (xx) | 1990-04-30 |
JPH01243891A (ja) | 1989-09-28 |
EP0327989A1 (fr) | 1989-08-16 |
EP0327989B1 (fr) | 1991-08-28 |
JP2905856B2 (ja) | 1999-06-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PF | Patent in force | ||
PE | Patent expired |
Effective date: 20090202 |