US3905188A - Electronic timepiece - Google Patents

Electronic timepiece Download PDF

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Publication number
US3905188A
US3905188A US466223A US46622374A US3905188A US 3905188 A US3905188 A US 3905188A US 466223 A US466223 A US 466223A US 46622374 A US46622374 A US 46622374A US 3905188 A US3905188 A US 3905188A
Authority
US
United States
Prior art keywords
transistor
base
amplifier
transducer
mechanical
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 - Lifetime
Application number
US466223A
Other languages
English (en)
Inventor
Yasuhiko Nishikubo
Heihachiro Ebihara
Shingo Hashimoto
Hiroyuki Fukayama
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
Application granted granted Critical
Publication of US3905188A publication Critical patent/US3905188A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G99/00—Subject matter not provided for in other groups of this subclass
    • 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
    • G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
    • G04C3/06—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using electromagnetic coupling between electric power source and balance
    • G04C3/065—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using electromagnetic coupling between electric power source and balance the balance controlling gear-train by means of static switches, e.g. transistor circuits
    • G04C3/067—Driving circuits with distinct detecting and driving coils
    • G04C3/068—Driving circuits with distinct detecting and driving coils provided with automatic control
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
    • H10D84/60—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of at least one component covered by groups H10D10/00 or H10D18/00, e.g. integration of BJTs
    • H10D84/611—Combinations of BJTs and one or more of diodes, resistors or capacitors

Definitions

  • FIG. I is shown an electronic circuit of a balancehairspring-driven electronic timepiece heretofore proposed.
  • Q designates a transistor, R a base bias resistor, C a condenser for defining a time constant, Cx a condenser adapted to prevent an abnormal oscillation, L; a detecting coil, L a balance-hairspringdriving coil, and V an electric power source.
  • This method is required to maintain the applied direct current component for a time longer than the period of the oscillating body, and as a result, the time constant of discharging the condenser must be large.
  • FIG. 7 is a partial longitudinal sectional view of a MOAOS construction used in the electronic circuit shown in FIG. 5;
  • TABLE Thickness of thermally Resistance value (voltage across In the above Table, the specific resistance of the N type silicon substrate is 5 Qrcm, the thickness of the alumina film is 2000 A, the thickness of the protective SiO film is 1000 A, and W/L of the MOS-R (Metal-Oxide-Silicon-Resistor) is l/200 (W is a width of the gate 7 and L is its length as shown in FIG. 6).
  • MOS-R Metal-Oxide-Silicon-Resistor
  • an oscillating body connected to said mechanical transducer and driven by said mechanical energy to an amplitude dependent upon the energy of a signal applied to said transducer; mechanical-electrical transducer coupled to said oscillating body for generating an electric feedback signal having an amplitude corresponding to the displacement of said oscillating body;
  • said feedback amplifier includes a plurality of other pairs of NPN transistors with a first transistor of each pair having an emitter connected to the base of the second transistor of each pair and their collectors tied together and to the base of the first transistor of a successive pair, said output terminal being connected through a resistor to the base of the first transistor of the first pair and said mechanical electrical transducer being connected via a second capacitor to the base of the first transistor of the first pair;
  • said timepiecefurther including another NPN transistor having its base connected to the collector of the last transistor of the last pair, and the last NPN transistor in the last pair having its base connected to the emitter of said other transistor in the last mentioned pair, a PNP transistor having its base connected to the collector of said last mentioned transistor and said first NPN transistor in the said feedback amplifier having a base connected to the collector of said PNP transistor and the emittercollector electrodes of said PNP transistor in circuit with said electromechanical transducer.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Bipolar Transistors (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
  • Semiconductor Integrated Circuits (AREA)
  • Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
US466223A 1973-05-24 1974-05-02 Electronic timepiece Expired - Lifetime US3905188A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48057208A JPS5010168A (enrdf_load_stackoverflow) 1973-05-24 1973-05-24

Publications (1)

Publication Number Publication Date
US3905188A true US3905188A (en) 1975-09-16

Family

ID=13049080

Family Applications (1)

Application Number Title Priority Date Filing Date
US466223A Expired - Lifetime US3905188A (en) 1973-05-24 1974-05-02 Electronic timepiece

Country Status (5)

Country Link
US (1) US3905188A (enrdf_load_stackoverflow)
JP (1) JPS5010168A (enrdf_load_stackoverflow)
DE (1) DE2425253B2 (enrdf_load_stackoverflow)
FR (1) FR2231043B1 (enrdf_load_stackoverflow)
GB (1) GB1446497A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106280A (en) * 1975-03-27 1978-08-15 Hansrichard Schulz Method and apparatus for synchronizing a mechanical oscillating system to the accuracy of a quartz standard
US4112670A (en) * 1975-03-04 1978-09-12 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
US4300083A (en) * 1977-07-05 1981-11-10 Automation Devices, Inc. Constant amplitude controller and method
US4333171A (en) * 1979-09-04 1982-06-01 Citizen Watch Co., Ltd. Electronic timepiece with diffusion resistor for compensating threshold variations

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5220120A (en) * 1975-08-08 1977-02-15 Touhoku Rikoo Kk Printer using dielectric element and matrix type
JPS5230519A (en) * 1975-09-04 1977-03-08 Nippon Telegraph & Telephone Printing head for picture element impact printer
JPS59196275A (ja) * 1983-04-21 1984-11-07 Tokyo Electric Co Ltd プリンタの印字ハンマ駆動装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124731A (en) * 1964-03-10 Electronic time pieces
US3221231A (en) * 1960-03-31 1965-11-30 Reich Robert Walter Electromagnetic impelling system for mechanical oscillators
US3447051A (en) * 1965-01-13 1969-05-27 Union Special Machine Co Control circuit for electro-mechanical devices
US3568430A (en) * 1968-07-11 1971-03-09 Hamilton Watch Co Resistance bridge controlled timekeeping device
US3602842A (en) * 1969-08-08 1971-08-31 Scudder Smith Electromechanical oscillator including a dual vibrator for producing a bent frequency

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1078790A (en) * 1964-11-20 1967-08-09 Nippon Electric Co A resistor element and a manufacturing method therefor
CH466149A (fr) * 1966-12-22 1969-01-15 Centre Electron Horloger Circuit d'entretien d'un dispositif mécanique résonnant, d'un garde-temps
FR2138339B1 (enrdf_load_stackoverflow) * 1971-05-24 1974-08-19 Radiotechnique Compelec

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124731A (en) * 1964-03-10 Electronic time pieces
US3221231A (en) * 1960-03-31 1965-11-30 Reich Robert Walter Electromagnetic impelling system for mechanical oscillators
US3447051A (en) * 1965-01-13 1969-05-27 Union Special Machine Co Control circuit for electro-mechanical devices
US3568430A (en) * 1968-07-11 1971-03-09 Hamilton Watch Co Resistance bridge controlled timekeeping device
US3602842A (en) * 1969-08-08 1971-08-31 Scudder Smith Electromechanical oscillator including a dual vibrator for producing a bent frequency

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112670A (en) * 1975-03-04 1978-09-12 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
US4106280A (en) * 1975-03-27 1978-08-15 Hansrichard Schulz Method and apparatus for synchronizing a mechanical oscillating system to the accuracy of a quartz standard
US4300083A (en) * 1977-07-05 1981-11-10 Automation Devices, Inc. Constant amplitude controller and method
US4333171A (en) * 1979-09-04 1982-06-01 Citizen Watch Co., Ltd. Electronic timepiece with diffusion resistor for compensating threshold variations

Also Published As

Publication number Publication date
DE2425253A1 (de) 1974-12-12
DE2425253B2 (de) 1978-06-08
FR2231043B1 (enrdf_load_stackoverflow) 1977-04-08
FR2231043A1 (enrdf_load_stackoverflow) 1974-12-20
GB1446497A (en) 1976-08-18
JPS5010168A (enrdf_load_stackoverflow) 1975-02-01

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