US3812669A - Electronic timepiece - Google Patents

Electronic timepiece Download PDF

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Publication number
US3812669A
US3812669A US00246533A US24653372A US3812669A US 3812669 A US3812669 A US 3812669A US 00246533 A US00246533 A US 00246533A US 24653372 A US24653372 A US 24653372A US 3812669 A US3812669 A US 3812669A
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United States
Prior art keywords
chain
frequency
division
comparator
stages
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
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US00246533A
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English (en)
Inventor
F Wiget
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.)
ETS SA A SWISS CORP
Original Assignee
Ebauches SA
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Publication date
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Publication of US3812669A publication Critical patent/US3812669A/en
Assigned to ETS S.A., A SWISS CORP. reassignment ETS S.A., A SWISS CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EBAUCHES S.A.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
    • H03K23/64—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two
    • H03K23/66—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
    • G04G3/022—Circuits for deriving low frequency timing pulses from pulses of higher frequency the desired number of pulses per unit of time being obtained by adding to or substracting from a pulse train one or more pulses

Definitions

  • ABSTRACT 22 Fil Apt 24, 1972 In an electronic timepiece in which a piezoelectric oscillator acts as a time base and controls a display delzl] PP N05 6 5 ,37 vice through a frequency division chain, the scale of division in the chain is adjustable for regulating the [30] Apphcamn Pnomy Data timepiece.
  • a digital comparator compares the logic Apr. 22, 1971 Switzerland ..5852/71 state of a binary reference with that of specificstages of the division chain, the comparator being alternately [52] US. Cl. 58/23 R, 328/48 blocked during a natural period of the division chain [51] Int. Cl G04c 3/00 and unblocked during the ensuing period.
  • An electronic timepiece movement generally comprises:
  • a frequency integrator which integrates this low frequency so as to'produce a time scale and which is constituted for example by a synchronous or step-bystep motor which drives a train carrying the conventional hands or by an electronic counter'with a'digital time display, and
  • the accuracy of the timepiece is identical with that of the oscillator, or, expressed'more precisely, with that v of the frequency-determining resonator of the oscillator.
  • driving means causing the frequency to depart to a greater or'lesser extent from the natural frequency of the resonator. It is thus possible to fabricate an accurate oscillator and to re-establish the accuracy (within certain limits) when it deteriorates.
  • a variable capacitor called a trimmer is mounted, for example, in series with a crystal resonator, the trimmer making it possible to regulate the oscillator frequency.
  • the frequency of the oscillator is identical with that of the resv onator, which oscillates at its natural frequency so that its oscillations are not perturbed in any way
  • the scale of division in the electronic divider is adjusted so as to obtain, while proceeding from the arbitrary frequency of the oscillator, a time scale possessing the required accuracy. For example, if the scale of division of the divider is of the order of 10 the accuracy of the time scale may be adjusted to approximately 10", that is, to less than 0.1 second a day, this being over a range as wide as may be desired.
  • the present invention therefore provides an electronic timepiece movement which comprises a piezoelectric oscillator'which acts as the time base, a frequency-division chain and a display device controlled at least indirectly by the output signal from the said division chain, characterised by means which make it possible to adjust the scale of division of the said chain within certain limits, the said means being constituted by:
  • a digital comparator intended to compare the logic state of a binary reference of M bits with that of M stages in the said division chain
  • FIG. 1 is a block diagram of an electronic timepiece embodying the invention
  • FIG. 2 is a diagram of one possible form of the digital comparator and of the binary reference
  • FIG. 3 is a diagram of one possible form of a monostable multivibrator which indicates the rate of the electrical signals.
  • F the frequency of the oscillator shown in FIG. 1
  • FFD the frequency of the oscillator shown in FIG. 1
  • the scale of division of this chain is A 2**' and the natural period of the chain is T 2 -F
  • MONO l a monostable multivibrator
  • the outputs of the division-chain flip-flops with the superscripts N+l to N+M are connected to the inputs A, to A of a digital comparator of M bits.
  • the M 0utputs of a binary reference of M bits are connected to the inputs B to B of the digital comparator of M bits.
  • FIG. 2 is a diagram of a possible form of a comparator and of a binary reference.
  • Use is made of NOR gates in positive logic. It will be noted that. in this particular case. the logic reference has to pass the complementary value of K to the comparator.
  • the logic reference is taken in 10 this simple example to be constituted by switches.
  • FIG. 3 shows a possible form of a monostable multivibrator such as that designated MONO l or MONO 2 in FIG. 2. It is arrived at by the use of a type-D flip-flop (tapped off at two points from the division chain) and of a NOR gate. The form of the signals at various points on the circuit is set out beneath the circuit diagram.
  • An electronic timepiece movement comprising: a piezoelectric oscillator acting as a time base, a frequency-division chain, a display devicecontrolled at least indirectly by the output signal of the frequency-division chain, and means to adjust within certain limits the scale of division of the frequency-division chain and constituted by:
  • a digital comparator for comparing the logic state of a binary reference of M bits with that of M stages of the frequency-division chain
  • a b. a device for alternately blocking the comparator during a natural period of the frequency-division chain and unblocking the comparator during the ensuing period
  • I c. a circuit which cuts short .the ensuing period from the instant when there is coincidence between the logic state of thereference and that of the M stages, the M stages of the chain being reset to zero
  • the binary reference being constituted by a set of M switches which supply logic-level signals 0 or 1 to the inputs of the digital comparator.
  • a movement according to claim 1, comprising a flip-flop which controls the blocking input to the comparator, the flip-flop being'itself controlled alternately 40 by the comparator output and the division chain output.
  • a piezoelectric oscillator functioning as a time base
  • a frequency-division chain a display device controlled indirectly by the output signal of the frequency-division chain, and means to adjust within certain limits the scale of division of the frequency-chain constituted by:
  • a digital comparator for comparing the logic state of a binary reference of M bits with that of M stages of the frequency division chain

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Electric Clocks (AREA)
US00246533A 1971-04-22 1972-04-24 Electronic timepiece Expired - Lifetime US3812669A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH585271A CH540520A (fr) 1971-04-22 1971-04-22 Mouvement d'horlogerie électronique

Publications (1)

Publication Number Publication Date
US3812669A true US3812669A (en) 1974-05-28

Family

ID=4300378

Family Applications (1)

Application Number Title Priority Date Filing Date
US00246533A Expired - Lifetime US3812669A (en) 1971-04-22 1972-04-24 Electronic timepiece

Country Status (7)

Country Link
US (1) US3812669A (de)
JP (1) JPS5625636B1 (de)
CH (2) CH540520A (de)
DE (1) DE2219493C3 (de)
FR (1) FR2133872B1 (de)
GB (1) GB1370564A (de)
IT (1) IT952693B (de)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922844A (en) * 1973-04-25 1975-12-02 Suwa Seikosha Kk Electronic timepiece
US3931703A (en) * 1973-02-27 1976-01-13 Ebauches S.A. Correcting device for an electronic watch
US3967442A (en) * 1973-02-01 1976-07-06 Berney Jean Claude Electric watch having an electromechanical movement including a correction mechanism for small errors
US3975898A (en) * 1974-07-11 1976-08-24 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
US3978649A (en) * 1973-07-20 1976-09-07 Kabushiki Kaisha Suwa Seikosha Quartz crystal electronic timepiece
US3998044A (en) * 1973-12-19 1976-12-21 Citizen Watch Co., Ltd. Electronic timepiece
US4009445A (en) * 1974-08-19 1977-02-22 Kabushiki Kaisha Daini Seikosha Divider for an electronic timepiece
US4020626A (en) * 1974-05-14 1977-05-03 Kabushiki Kaisha Daini Seikosha Electronic timepiece
US4062178A (en) * 1973-04-19 1977-12-13 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
US4132060A (en) * 1976-06-24 1979-01-02 Casio Computer Co., Ltd. Electronic timepiece
US4134254A (en) * 1974-12-17 1979-01-16 Casio Computer Co., Ltd. Electronic timepiece device
US4162608A (en) * 1974-06-05 1979-07-31 Kabushiki Kaisha Suwa Seikosha Electronic timepiece frequency regulating circuit
US4292680A (en) * 1974-10-31 1981-09-29 Citizen Watch Company Limited Electronic timepiece
US4320482A (en) * 1978-06-27 1982-03-16 Kabushiki Kaisha Daini Seikosha Switch for an electronic timepiece
US4321698A (en) * 1978-02-07 1982-03-23 Kabushiki Kaisha Suwa Seikosha Temperature compensated quartz wristwatch with memory stored predetermined temperature compensating data
US4345320A (en) * 1977-02-28 1982-08-17 Jean-Claude Berney Sa Integrated circuit for a time-piece
US4608706A (en) * 1983-07-11 1986-08-26 International Business Machines Corporation High-speed programmable timing generator
FR2669791A1 (fr) * 1990-11-27 1992-05-29 Met Procede de correction de la derive systematique des horloges pilotees par un oscillateur et son dispositif de mise en óoeuvre.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6024433B2 (ja) * 1975-08-01 1985-06-12 シチズン時計株式会社 時計用回路
JPS6039193B2 (ja) * 1977-10-18 1985-09-04 セイコーエプソン株式会社 電子時計
DE3021863C2 (de) * 1980-06-11 1985-03-21 Vdo Adolf Schindling Ag, 6000 Frankfurt Elektronische Uhr mit einer Zeitbasis und einer Temperaturkompensationsschaltungsanordnung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230383A (en) * 1962-03-12 1966-01-18 Bunker Ramo Clock pulse counter
US3541779A (en) * 1968-03-19 1970-11-24 Corning Glass Works Electronic timepiece
US3581066A (en) * 1968-03-06 1971-05-25 Lear Siegler Inc Programmable counting circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL150631B (nl) * 1965-02-16 1976-08-16 Philips Nv Instelbare frequentiedeler.
JPS4123747Y1 (de) * 1966-05-26 1966-12-02
CH1908768A4 (de) * 1968-12-20 1970-08-31

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230383A (en) * 1962-03-12 1966-01-18 Bunker Ramo Clock pulse counter
US3581066A (en) * 1968-03-06 1971-05-25 Lear Siegler Inc Programmable counting circuit
US3541779A (en) * 1968-03-19 1970-11-24 Corning Glass Works Electronic timepiece

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967442A (en) * 1973-02-01 1976-07-06 Berney Jean Claude Electric watch having an electromechanical movement including a correction mechanism for small errors
US3931703A (en) * 1973-02-27 1976-01-13 Ebauches S.A. Correcting device for an electronic watch
US4062178A (en) * 1973-04-19 1977-12-13 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
US3922844A (en) * 1973-04-25 1975-12-02 Suwa Seikosha Kk Electronic timepiece
US3978649A (en) * 1973-07-20 1976-09-07 Kabushiki Kaisha Suwa Seikosha Quartz crystal electronic timepiece
US3998044A (en) * 1973-12-19 1976-12-21 Citizen Watch Co., Ltd. Electronic timepiece
US4020626A (en) * 1974-05-14 1977-05-03 Kabushiki Kaisha Daini Seikosha Electronic timepiece
US4162608A (en) * 1974-06-05 1979-07-31 Kabushiki Kaisha Suwa Seikosha Electronic timepiece frequency regulating circuit
US3975898A (en) * 1974-07-11 1976-08-24 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
US4009445A (en) * 1974-08-19 1977-02-22 Kabushiki Kaisha Daini Seikosha Divider for an electronic timepiece
US4292680A (en) * 1974-10-31 1981-09-29 Citizen Watch Company Limited Electronic timepiece
US4134254A (en) * 1974-12-17 1979-01-16 Casio Computer Co., Ltd. Electronic timepiece device
US4132060A (en) * 1976-06-24 1979-01-02 Casio Computer Co., Ltd. Electronic timepiece
US4345320A (en) * 1977-02-28 1982-08-17 Jean-Claude Berney Sa Integrated circuit for a time-piece
US4321698A (en) * 1978-02-07 1982-03-23 Kabushiki Kaisha Suwa Seikosha Temperature compensated quartz wristwatch with memory stored predetermined temperature compensating data
US4320482A (en) * 1978-06-27 1982-03-16 Kabushiki Kaisha Daini Seikosha Switch for an electronic timepiece
US4608706A (en) * 1983-07-11 1986-08-26 International Business Machines Corporation High-speed programmable timing generator
FR2669791A1 (fr) * 1990-11-27 1992-05-29 Met Procede de correction de la derive systematique des horloges pilotees par un oscillateur et son dispositif de mise en óoeuvre.

Also Published As

Publication number Publication date
CH585271A4 (de) 1973-02-15
IT952693B (it) 1973-07-30
DE2219493C3 (de) 1974-08-15
CH540520A (fr) 1973-02-15
JPS5625636B1 (de) 1981-06-13
DE2219493A1 (de) 1972-11-02
DE2219493B2 (de) 1974-01-24
GB1370564A (en) 1974-10-16
FR2133872A1 (de) 1972-12-01
FR2133872B1 (de) 1976-10-29

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ETS S.A., FABRIQUES D`EBAUCHES, SCHILD-RUSTSTRASSE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:EBAUCHES S.A.;REEL/FRAME:004331/0137

Effective date: 19841023