CH635722GA3 - - Google Patents

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Publication number
CH635722GA3
CH635722GA3 CH813779A CH813779A CH635722GA3 CH 635722G A3 CH635722G A3 CH 635722GA3 CH 813779 A CH813779 A CH 813779A CH 813779 A CH813779 A CH 813779A CH 635722G A3 CH635722G A3 CH 635722GA3
Authority
CH
Switzerland
Prior art keywords
detector circuit
load current
rotor
amplifier
points
Prior art date
Application number
CH813779A
Other languages
French (fr)
Other versions
CH635722B (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
Publication of CH635722B publication Critical patent/CH635722B/en
Application filed filed Critical
Priority to CH813779A priority Critical patent/CH635722B/en
Priority to GB8027986A priority patent/GB2059648B/en
Priority to FR8018929A priority patent/FR2465229A1/en
Priority to DE3033350A priority patent/DE3033350C2/en
Priority to JP12522780A priority patent/JPS56111485A/en
Publication of CH635722GA3 publication Critical patent/CH635722GA3/fr

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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)

Abstract

An electronic timepiece comprises a stepping motor driven by alternating square wave pulses, and a detector circuit for detecting the non-rotation condition of the rotor. The detector circuit is responsive to motor load current and looks for the presence of points A, B or C in the load current waveform curve 3 Fig. 1 which indicates normal rotatable condition. If the rotor has missed a step or the load is excessive such that these points are not detected, the load current being as waveforms curves 1, 2 Fig. 1, the detector circuit output is used to progressively adjust drive pulse duration accordingly as in Fig. 7 arrangement, or to make up for lost steps as in Fig. 6 arrangement. The detector circuit comprises an amplifier 24 including MOS transistors 1, 2 (eg as in Fig. 2) and a capacitor 3. Voltage applied to the amplifier is proportional to and has the same waveform as the motor drive current. <IMAGE>
CH813779A 1979-09-10 1979-09-10 WATCHMAKING PART INCLUDING A STEP MOTOR DETECTION AND CONTROL CIRCUIT. CH635722B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CH813779A CH635722B (en) 1979-09-10 1979-09-10 WATCHMAKING PART INCLUDING A STEP MOTOR DETECTION AND CONTROL CIRCUIT.
GB8027986A GB2059648B (en) 1979-09-10 1980-08-29 Electronic timepiece with stepping motor
FR8018929A FR2465229A1 (en) 1979-09-10 1980-09-02 WATCH PIECE HAVING A DETECTION AND CONTROL CIRCUIT FOR A STEP BY STEP MOTOR
DE3033350A DE3033350C2 (en) 1979-09-10 1980-09-04 Timepiece with a detection and control circuit for the stepper motor
JP12522780A JPS56111485A (en) 1979-09-10 1980-09-09 Watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH813779A CH635722B (en) 1979-09-10 1979-09-10 WATCHMAKING PART INCLUDING A STEP MOTOR DETECTION AND CONTROL CIRCUIT.

Publications (2)

Publication Number Publication Date
CH635722B CH635722B (en)
CH635722GA3 true CH635722GA3 (en) 1983-04-29

Family

ID=4335723

Family Applications (1)

Application Number Title Priority Date Filing Date
CH813779A CH635722B (en) 1979-09-10 1979-09-10 WATCHMAKING PART INCLUDING A STEP MOTOR DETECTION AND CONTROL CIRCUIT.

Country Status (5)

Country Link
JP (1) JPS56111485A (en)
CH (1) CH635722B (en)
DE (1) DE3033350C2 (en)
FR (1) FR2465229A1 (en)
GB (1) GB2059648B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2900153B1 (en) * 1998-02-10 1999-06-02 セイコーインスツルメンツ株式会社 Analog electronic clock

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53114467A (en) * 1977-03-16 1978-10-05 Seiko Instr & Electronics Ltd Electronic watch
JPS586400B2 (en) * 1977-11-29 1983-02-04 セイコーエプソン株式会社 electronic clock
JPS5477165A (en) * 1977-12-02 1979-06-20 Seiko Instr & Electronics Ltd Electronic watch

Also Published As

Publication number Publication date
CH635722B (en)
GB2059648A (en) 1981-04-23
FR2465229B1 (en) 1983-06-24
FR2465229A1 (en) 1981-03-20
JPS56111485A (en) 1981-09-03
DE3033350C2 (en) 1983-04-28
JPH0118398B2 (en) 1989-04-05
DE3033350A1 (en) 1981-03-12
GB2059648B (en) 1983-06-29

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