CH672043GA3 - - Google Patents

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Publication number
CH672043GA3
CH672043GA3 CH51388A CH51388A CH672043GA3 CH 672043G A3 CH672043G A3 CH 672043GA3 CH 51388 A CH51388 A CH 51388A CH 51388 A CH51388 A CH 51388A CH 672043G A3 CH672043G A3 CH 672043GA3
Authority
CH
Switzerland
Prior art keywords
voltage
pulses
battery
control circuit
driving
Prior art date
Application number
CH51388A
Other languages
French (fr)
Other versions
CH672043B5 (en
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 filed Critical
Priority to CH513/88A priority Critical patent/CH672043B5/fr
Priority to EP89101879A priority patent/EP0327989B1/en
Priority to DE8989101879T priority patent/DE68900226D1/en
Priority to JP1031250A priority patent/JP2905856B2/en
Publication of CH672043GA3 publication Critical patent/CH672043GA3/fr
Publication of CH672043B5 publication Critical patent/CH672043B5/fr
Priority to US07/585,797 priority patent/US5237254A/en
Priority to SG117994A priority patent/SG117994G/en
Priority to HK142594A priority patent/HK142594A/en

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

Abstract

The control circuit (19) receives a supply voltage (Vb) provided by a battery (7), and in response to a time-base signal (S3) it sends driving voltage pulses (Vm) to a stepping motor (5), the rotor of which causes the time (6) to be displayed. The driving pulses are also applied to the control circuit (19) which comprises an adjusting circuit (20), the function of which is to compare the voltage (Vm) of these pulses with a reference voltage (Vr) and to produce, in each pulse, interruptions, the duration and number of which are determined so as to keep the mean voltage of each pulse constant in the presence of a variation of the supply voltage. Under these conditions, the motor (5) is controlled by driving pulses of constant energy, whatever the voltage (Vb) of the battery (7). <IMAGE>
CH513/88A 1988-02-12 1988-02-12 CH672043B5 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CH513/88A CH672043B5 (en) 1988-02-12 1988-02-12
EP89101879A EP0327989B1 (en) 1988-02-12 1989-02-03 Stepper motor control circuit, especially for watches
DE8989101879T DE68900226D1 (en) 1988-02-12 1989-02-03 CONTROL CIRCUIT FOR A STEPPER MOTOR, IN PARTICULAR FOR WATCHES.
JP1031250A JP2905856B2 (en) 1988-02-12 1989-02-13 Stepping motor control circuit
US07/585,797 US5237254A (en) 1988-02-12 1990-09-20 Control circuit for a stepping motor
SG117994A SG117994G (en) 1988-02-12 1994-08-19 Stepper motor control circuit, especially for watches
HK142594A HK142594A (en) 1988-02-12 1994-12-15 Stepper motor control circuit, especially for watches

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
CH672043GA3 true CH672043GA3 (en) 1989-10-31
CH672043B5 CH672043B5 (en) 1990-04-30

Family

ID=4188724

Family Applications (1)

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

Country Status (5)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995027926A1 (en) * 1994-04-06 1995-10-19 Citizen Watch Co., Ltd. Electronic timepiece
JP5265821B1 (en) 2013-01-28 2013-08-14 日本食品化工株式会社 Oil processed starch and method for producing the same
JP7066361B2 (en) * 2017-09-21 2022-05-13 セイコーインスツル株式会社 Clocks, electronic devices, and how to control clocks

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381481A (en) * 1979-11-07 1983-04-26 Gebruder Junghans Gmbh Control circuit for a stepping motor in battery-operated instruments
JPS5979886A (en) * 1982-10-29 1984-05-09 Rhythm Watch Co Ltd Motor drive circuit of time piece
EP0140089A1 (en) * 1983-09-16 1985-05-08 Omega SA Process for feeding a stepping motor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381481A (en) * 1979-11-07 1983-04-26 Gebruder Junghans Gmbh Control circuit for a stepping motor in battery-operated instruments
JPS5979886A (en) * 1982-10-29 1984-05-09 Rhythm Watch Co Ltd Motor drive circuit of time piece
EP0140089A1 (en) * 1983-09-16 1985-05-08 Omega SA Process for feeding a stepping motor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 8, no. 192 (P-298)[1629], 4 septembre 1984; & JP-A-59 079 886 (RHYTHM TOKEI KOGYO K.K.) 09-05-1984 *
XIe CONGRES INTERNATIONAL DE CHRONOMETRIE, Besançon, 4-6 octobre 1984, vol. 1, pages 129-132; M. ACKERMANN: "Geregelte Mikroschrittmotore in Quarzanaloguhren" *

Also Published As

Publication number Publication date
JP2905856B2 (en) 1999-06-14
EP0327989B1 (en) 1991-08-28
HK142594A (en) 1994-12-23
EP0327989A1 (en) 1989-08-16
JPH01243891A (en) 1989-09-28
DE68900226D1 (en) 1991-10-02
CH672043B5 (en) 1990-04-30

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PL Patent ceased