JPS54143268A - Driving circuit of electro-mechanical converter for watches - Google Patents

Driving circuit of electro-mechanical converter for watches

Info

Publication number
JPS54143268A
JPS54143268A JP5102078A JP5102078A JPS54143268A JP S54143268 A JPS54143268 A JP S54143268A JP 5102078 A JP5102078 A JP 5102078A JP 5102078 A JP5102078 A JP 5102078A JP S54143268 A JPS54143268 A JP S54143268A
Authority
JP
Japan
Prior art keywords
pulse width
driving
pulses
phi2
become
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
Application number
JP5102078A
Other languages
Japanese (ja)
Inventor
Akio Nakajima
Tadayasu Machida
Kenji Yamada
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP5102078A priority Critical patent/JPS54143268A/en
Publication of JPS54143268A publication Critical patent/JPS54143268A/en
Pending 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

PURPOSE:To improve load resistance characteristics and improve stability by controlling the pulse width of driving pulses of two phases stepwise by the induced voltage of a detecting coil. CONSTITUTION:The outputs of the flip-flops (FF) 117, 118 of a frequency dividing circuit 602 become the respective inputs to a frequency changeover circuit 121. At the steady time, the output of the FF 117 is applied as the output of the changeover circuit 121 to the reset terminals of the FFs 122, 123, from which the pulses phi1, phi2 of a narrow pulse width are alternately generated. These cause driving current to flow in a driving coil 128 thus rotating a rotor by each 180 deg. per step. When a load such as impact load or calendar display is applied, the induced voltage of a detecting coil 129 decreases and becomes lower than the threshold values of the inverters 132, 133 and the pulses phi1, phi2 become of the pulse width twice that at the steady time and therefore driving power is increased and malfunction may be prevented.
JP5102078A 1978-04-28 1978-04-28 Driving circuit of electro-mechanical converter for watches Pending JPS54143268A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5102078A JPS54143268A (en) 1978-04-28 1978-04-28 Driving circuit of electro-mechanical converter for watches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5102078A JPS54143268A (en) 1978-04-28 1978-04-28 Driving circuit of electro-mechanical converter for watches

Publications (1)

Publication Number Publication Date
JPS54143268A true JPS54143268A (en) 1979-11-08

Family

ID=12875102

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5102078A Pending JPS54143268A (en) 1978-04-28 1978-04-28 Driving circuit of electro-mechanical converter for watches

Country Status (1)

Country Link
JP (1) JPS54143268A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000139098A (en) * 1992-03-18 2000-05-16 Citizen Watch Co Ltd Electronic apparatus
JP2001292596A (en) * 2000-04-07 2001-10-19 Yazaki Corp Stepping motor and driving device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000139098A (en) * 1992-03-18 2000-05-16 Citizen Watch Co Ltd Electronic apparatus
JP2001292596A (en) * 2000-04-07 2001-10-19 Yazaki Corp Stepping motor and driving device

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