JPS5587977A - Device for detecting electronic watch - Google Patents
Device for detecting electronic watchInfo
- Publication number
- JPS5587977A JPS5587977A JP16151078A JP16151078A JPS5587977A JP S5587977 A JPS5587977 A JP S5587977A JP 16151078 A JP16151078 A JP 16151078A JP 16151078 A JP16151078 A JP 16151078A JP S5587977 A JPS5587977 A JP S5587977A
- Authority
- JP
- Japan
- Prior art keywords
- detecting
- rotation
- closed circuit
- step motor
- magnetic field
- 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.)
- Pending
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)
- Control Of Stepping Motors (AREA)
Abstract
PURPOSE:To enhance the detecting sensitivity of a device for detecting an electronic watch and stabilize the drive of a motor by forming a closed circuit having lower resistance than that when detecting the rotation of the rotor for a step motor, when detecting the external magnetic field at the detecting circuit provided at the coil of the step motor to thereby increase the operating time. CONSTITUTION:A signal for driving a step motor is applied to inputs separated at N-channel FET gates 4b, 5b and P-channel FET gates 4a, 5a, and resistors 6a, 6b for detecting the rotation or non-rotation of the rotor for the step motor and N gates 7a, 7b for switching the resistors are connected thereto. When detecting the rotation or non-rotation of the step motor, it forms a closed circuit 10 including high resistance, and when detecting the commercial frequency magnetic field or the like, it forms a closed circuit 11 including low resistance. When the operating time of the closed circuit 11 including the low resistance is set longer than that of the closed circuit 10 including the high resistance, it can enhance the detecting sensitivity of the external magnetic field.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16151078A JPS5587977A (en) | 1978-12-26 | 1978-12-26 | Device for detecting electronic watch |
US06/100,222 US4321521A (en) | 1978-12-25 | 1979-12-04 | Detection device of electronic timepiece |
GB7942565A GB2038512A (en) | 1978-12-25 | 1979-12-10 | Stepping motor driven electronic timepieces |
CH1143279A CH639235B (en) | 1978-12-25 | 1979-12-21 | ROTATION / NON-ROTATION DETECTION AND CORRECTIVE PULSES PRODUCTION DEVICE, FOR ELECTRONIC WATCH PART, ESPECIALLY FOR ELECTRONIC BRACELET WATCHES. |
DE19792951947 DE2951947A1 (en) | 1978-12-25 | 1979-12-22 | DRIVING CIRCUIT FOR A STEPPER MOTOR OF AN ELECTRIC WATCH |
FR7931591A FR2445653A1 (en) | 1978-12-25 | 1979-12-24 | DETECTION DEVICE FOR AN ELECTRONIC WATCH |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16151078A JPS5587977A (en) | 1978-12-26 | 1978-12-26 | Device for detecting electronic watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5587977A true JPS5587977A (en) | 1980-07-03 |
Family
ID=15736424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16151078A Pending JPS5587977A (en) | 1978-12-25 | 1978-12-26 | Device for detecting electronic watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5587977A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55142270A (en) * | 1979-04-24 | 1980-11-06 | Seiko Instr & Electronics Ltd | Detector for electronic watch |
JPS58173479A (en) * | 1982-04-06 | 1983-10-12 | Seiko Instr & Electronics Ltd | Electronic watch |
US4912689A (en) * | 1988-05-07 | 1990-03-27 | Seiko Epson Corporation | Compensating circuitry for an electronic watch |
JP2011067086A (en) * | 2009-08-17 | 2011-03-31 | Seiko Instruments Inc | Stepping motor control circuit and analog electronic clock |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5587077A (en) * | 1978-12-25 | 1980-07-01 | Seiko Instr & Electronics Ltd | Detector for electronic watch |
JPS5587076A (en) * | 1978-12-25 | 1980-07-01 | Seiko Instr & Electronics Ltd | Electronic watch |
-
1978
- 1978-12-26 JP JP16151078A patent/JPS5587977A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5587077A (en) * | 1978-12-25 | 1980-07-01 | Seiko Instr & Electronics Ltd | Detector for electronic watch |
JPS5587076A (en) * | 1978-12-25 | 1980-07-01 | Seiko Instr & Electronics Ltd | Electronic watch |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55142270A (en) * | 1979-04-24 | 1980-11-06 | Seiko Instr & Electronics Ltd | Detector for electronic watch |
JPS621223B2 (en) * | 1979-04-24 | 1987-01-12 | Seiko Denshi Kogyo Kk | |
JPS58173479A (en) * | 1982-04-06 | 1983-10-12 | Seiko Instr & Electronics Ltd | Electronic watch |
JPH0449673B2 (en) * | 1982-04-06 | 1992-08-12 | Seiko Instr & Electronics | |
US4912689A (en) * | 1988-05-07 | 1990-03-27 | Seiko Epson Corporation | Compensating circuitry for an electronic watch |
JP2011067086A (en) * | 2009-08-17 | 2011-03-31 | Seiko Instruments Inc | Stepping motor control circuit and analog electronic clock |
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