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GB1355892A - Drive circuit for an electronic timepiece - Google Patents

Drive circuit for an electronic timepiece

Info

Publication number
GB1355892A
GB1355892A GB4426372A GB4426372A GB1355892A GB 1355892 A GB1355892 A GB 1355892A GB 4426372 A GB4426372 A GB 4426372A GB 4426372 A GB4426372 A GB 4426372A GB 1355892 A GB1355892 A GB 1355892A
Authority
GB
United Kingdom
Prior art keywords
flip
input
signal
flop
drive
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.)
Expired
Application number
GB4426372A
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
Publication of GB1355892A publication Critical patent/GB1355892A/en
Expired 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)
  • Control Of Stepping Motors (AREA)
  • Electromechanical Clocks (AREA)

Abstract

1355892 Electronic timepiece CITIZEN WATCH CO Ltd 25 Sept 1972 [25 Sept 1971] 44263/72 Headings G3R and G3T An electro-mechanical drive for a timepiece which includes a drive coil 20, comprises a signal source 102<SP>1</SP>, a multi-stage frequency divider 5, 10, 11, 12, a gating circuit 15, 16, 17 to control the output of the frequency divider and provide drive pulses of variable width, the width being increased by a discrete amount when the voltage induced in the drive coil 20, is sensed to have dropped below a predetermined value. The output from source 102<SP>1</SP> is fed through inverter 3 directly to one input of flip-flop 5 and through inverter 4 to the other input of 5. A number of similar flip-flops (not shown) are connected in cascade to reduce the frequency to 128 Hz at the input of flip-flop 10 to produce a final frequency of 16 Hz at the output of flip-flop 12. If the signal from coil 20 exceeds a predetermined level then amplitude detector 13 switches memory 14 to level 0 which allows the 128 Hz signal from the input of flip-flop 10 to be fed through switching circuit 30 and to one input of NAND gate 17, the other three inputs being 64 Hz, 32 Hz, 16 Hz from the appropriate dividers, and as a result the drive pulse produced has a width of 1/16 period and repetition rate of 16 Hz Fig. 7, (not shown). Conversely when the signal does not exceed the required level then memory 14 is switched to level 1 which causes the 64 Hz signal from the input of flip-flop 11 plus the 128 Hz signal from 10 to be fed through 30 to gate 17 and as a result the drive pulse produced is twice as wide i.e. # period. This restores normal amplitude to the drive circuit very quickly.
GB4426372A 1971-09-25 1972-09-25 Drive circuit for an electronic timepiece Expired GB1355892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7475971A JPS5319944B2 (en) 1971-09-25 1971-09-25

Publications (1)

Publication Number Publication Date
GB1355892A true GB1355892A (en) 1974-06-05

Family

ID=13556511

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4426372A Expired GB1355892A (en) 1971-09-25 1972-09-25 Drive circuit for an electronic timepiece

Country Status (4)

Country Link
US (1) US3812670A (en)
JP (1) JPS5319944B2 (en)
DE (1) DE2247210C2 (en)
GB (1) GB1355892A (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542356B2 (en) * 1972-12-22 1980-10-30
CH1057373A4 (en) * 1973-07-19 1976-05-14
JPS5031864A (en) * 1973-07-20 1975-03-28
ES430659A1 (en) * 1973-10-24 1976-11-01 Jauch Method and apparatus for synchronizing andoscillating system which is driven by an energy storage device
JPS587190B2 (en) * 1973-12-05 1983-02-08 セイコーエプソン株式会社 Suishiodokei
GB1488914A (en) * 1973-12-19 1977-10-19 Citizen Watch Co Ltd Electronic timepiece
US4162608A (en) * 1974-06-05 1979-07-31 Kabushiki Kaisha Suwa Seikosha Electronic timepiece frequency regulating circuit
JPS5181165A (en) * 1975-01-13 1976-07-15 Suwa Seikosha Kk
JPS5292560A (en) * 1976-01-29 1977-08-04 Seiko Instr & Electronics Ltd Switch box drive pulse width control circuit for electronic clocks
JPS5915533B2 (en) * 1976-08-20 1984-04-10 シチズン時計株式会社 Drive circuit for electronic devices
JPS5345575A (en) * 1976-10-06 1978-04-24 Seiko Epson Corp Electronic wristwatch
US4104860A (en) * 1976-12-27 1978-08-08 Solid State Scientific Inc. High speed dynamic flip-flop system
CH635973B (en) * 1977-01-19 Suwa Seikosha Kk CONTROL CIRCUIT FOR AN ELECTROMECHANICAL TRANSDUCER OF A WATCH, ESPECIALLY OF AN ELECTRONIC BRACELET WATCH.
US4219999A (en) * 1977-03-03 1980-09-02 Citizen Watch Company, Limited Electronic timepiece equipped with battery life display
JPS53114467A (en) * 1977-03-16 1978-10-05 Seiko Instr & Electronics Ltd Electronic watch
JPS53132381A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS53132386A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS5428176A (en) * 1977-08-04 1979-03-02 Seiko Instr & Electronics Ltd Electronic watch
JPS5477169A (en) * 1977-12-02 1979-06-20 Seiko Instr & Electronics Ltd Electronic watch
JPS54156676A (en) * 1978-05-31 1979-12-10 Seiko Epson Corp Wristwatch
CH616045B (en) * 1978-06-20 Ebauches Sa PROCESS FOR REDUCING THE CONSUMPTION OF AN ELECTRONIC WATCH PART AND ELECTRONIC WATCH PART IMPLEMENTING THIS PROCESS.
US4283783A (en) * 1978-11-28 1981-08-11 Citizen Watch Company Limited Drive control system for stepping motor
CH647383GA3 (en) * 1981-02-04 1985-01-31
JPS5860292U (en) * 1982-07-22 1983-04-23 セイコーエプソン株式会社 Electronic clock with alarm
JPS63217288A (en) * 1987-03-06 1988-09-09 Seikosha Co Ltd Electromagnetic driving circuit
JPS6333196U (en) * 1987-04-10 1988-03-03
JPH02222859A (en) * 1990-01-11 1990-09-05 Seiko Epson Corp Electronic apparatus with alarm
US5550795A (en) * 1993-01-18 1996-08-27 Seiko Instruments Inc. Electronic timepiece and a method of driving a stepping motor of electronic timepiece

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370414A (en) * 1965-06-22 1968-02-27 Benrus Watch Company Inc Electronic timepiece
JPS4943989B1 (en) * 1968-07-19 1974-11-26
DE1809223B2 (en) * 1968-11-15 1972-11-30 Gebrüder Junghans GmbH, 7230 Schramberg WRISTWATCH WITH A PIEZOELECTRIC CRYSTAL AS A TIME HOLDING SWINGER
FR2060185B2 (en) * 1969-09-10 1974-03-15 Lavet Marius
GB1279058A (en) * 1970-01-28 1972-06-21 Seiko Instr & Electronics Timepiece
US3699762A (en) * 1971-04-05 1972-10-24 Timex Corp Synchronized contact watch

Also Published As

Publication number Publication date
JPS4841772A (en) 1973-06-18
DE2247210C2 (en) 1983-01-20
JPS5319944B2 (en) 1978-06-23
US3812670A (en) 1974-05-28
DE2247210A1 (en) 1973-03-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee