EP0015873B2 - Oscillateur avec un résonateur basse fréquence à quartz - Google Patents

Oscillateur avec un résonateur basse fréquence à quartz Download PDF

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Publication number
EP0015873B2
EP0015873B2 EP80810066A EP80810066A EP0015873B2 EP 0015873 B2 EP0015873 B2 EP 0015873B2 EP 80810066 A EP80810066 A EP 80810066A EP 80810066 A EP80810066 A EP 80810066A EP 0015873 B2 EP0015873 B2 EP 0015873B2
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EP
European Patent Office
Prior art keywords
frequency
oscillator
quartz crystal
crystal oscillator
high frequency
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
EP80810066A
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German (de)
English (en)
Other versions
EP0015873B1 (fr
EP0015873A1 (fr
Inventor
Alphonse Zumsteg
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.)
SSIH Management Services SA
Original Assignee
Societe Suisse pour lIindustrie Horlogere Management Services SA
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Publication date
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Publication of EP0015873A1 publication Critical patent/EP0015873A1/fr
Publication of EP0015873B1 publication Critical patent/EP0015873B1/fr
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    • 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
    • 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
    • G04G3/027—Circuits for deriving low frequency timing pulses from pulses of higher frequency by combining pulse-trains of different frequencies, e.g. obtained from two independent oscillators or from a common oscillator by means of different frequency dividing ratios

Definitions

  • the present invention relates to an oscillator with a low-frequency quartz oscillator, the output signal of which is fed to a frequency divider, the division ratio of which is controllable, so that the divided output frequency of the low-frequency quartz oscillator can be varied according to a criterion.
  • US-A-3364439 describes a clock with an oscillator which is controlled by a frequency standard, a so-called atomic clock with a higher frequency, by means of phase locking.
  • a programmable frequency divider is used, the divider ratio of which is controllable.
  • the control by means of phase locking described in this patent is very precise, but also very complex and not suitable for wristwatches or film cameras due to the high power consumption and volume requirement.
  • DE-A-2342701 describes a generator of isochronous reference periods with a 10 MHz high-frequency generator which has means for recognizing and receiving an external signal, as a result of which the generator is readjusted. Autonomous operation is not possible with such a generator, and the 10 MHz high-frequency generator has a power consumption that is too high for a wristwatch.
  • the basic diagram of the oscillator circuit can be seen in FIG.
  • the frequency of, for example, 4.19 MHz, 8.38 MHz or higher of the high-frequency resonator HF with a section according to US-A-4071 797 is reduced to 32 kHz in a frequency divider FT and given at A to a differential frequency generator DFG.
  • the signal from the low-frequency resonator for example a common quartz resonator with 32 kHz, is also applied to the differential frequency generator at point B. given.
  • a correction signal is generated, which is sent to a programmable frequency divider PRFT, which is also fed by the low-frequency signal.
  • the low-frequency signal is corrected in this programmable frequency divider and sent to the output OFF, from where it reaches the known timer circuit, which is not explained in detail here.
  • An electronic switch ES fed by the supply voltage Vs, is controlled by a signal CP from the timer circuit in order to provide a periodic signal S which switches the high-frequency resonator, the frequency divider FT and the differential frequency generator DFG periodically.
  • the switch-off time can be 15 minutes, for example, ie the signal CP is generated every 15 minutes for at least 16 seconds. As a result, the power consumption of the high-frequency resonator is reduced to approximately 1/50.
  • a new learning cycle begins every 15 minutes and if the frequency of the LF generator has changed during this time, the programmable frequency divider PRFT is reset.
  • FIGS. 2 and 4 show two details of an exemplary embodiment for the generation of the correction signal.
  • the high frequency of 4.19 or 8.38 MHz is reduced to kHz by the first frequency divider FT and then to a frequency of 1/16 Hz by a second frequency divider FT1.
  • the low frequency of 32 kHz is also reduced to 1 / by a frequency divider FT2 Brought 16 Hz.
  • a high-frequency resonator with a frequency of 8.38 MHz, however, one could also choose one of 1/8 Hz.
  • the logic LG sends a pulse to the flip-flop FF1, which then changes the pre-calibration and inputs this signal into the counter, whereupon the counter counts in the correct direction.
  • a second flip-flop FFR resets the bidirectional counter at the start of the measurement, the two flip-flops FF1 and FFR in turn being set to zero by the periodic signal S from the electronic switch ES when the high-frequency resonator is switched on.
  • the output from the counter reaches the programmable frequency divider via a decoder DC, as does a sign signal from the logic LG.
  • the programmable frequency divider always receives a correction signal that corresponds to the difference between the frequency response of the high-frequency and the low-frequency resonator, so that on average the output signal OFF in the long-term behavior with regard to accuracy, temperature behavior and aging corresponds to the behavior of the high-frequency quartz resonator behaves while the power consumption corresponds approximately to that of the continuously switched 32 kHz low-frequency quartz resonator.
  • the temperature compensation circuit TE mentioned in the discussion of FIG. 1 could expediently be connected between the bidirectional counter and the decoder.
  • the frequency difference always has the same sign, even with a change in temperature and aging of the quartz crystals, so that the circuit can be simplified considerably.
  • the period in which the frequency comparison takes place can also differ from the specified value; it depends on the highest available frequency and the desired resolution of the frequency setting. Another interval can also be selected within which the high-frequency resonator is switched off.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Electric Clocks (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Claims (5)

1. Oscillateur avec un résonateur à quartz de basse fréquence (NF) dont le signal de sortie est délivré à un diviseur de fréquence (PRFT) ayant un rapport de division controllable de manière que la fréquence de sortie divisée du résonateur à quartz de basse fréquence (NF) est variable en fonction d'un critère, caractérisé par le fait que dans l'utilisation de l'oscillateur dans une montre bracelet ou une caméra photographique, un oscillateur à quartz de haute feéquence (HF) additionnel stable en température et à longue durée est prevu dont la fréquence de sortie divisée est comparée à la fréquence de l'oscillateur à quartz de basse fréquence (NF), la dite comparaison de fréquence délivrant un signal de commande pour contrôler le diviseur de fréquence controllable (PRFT), de manière à synchroniser l'oscillateur à quartz de basse fréquence par l'oscillateur à quartz de haute fréquence, et par le fait que l'oscillateur à quartz de haute fréquence (HF) est enclenché et déclenché périodiquement au moyen d'un commutateur électronique (ES), pour diminuer la consommation de courant de l'oscillateur à quartz de haute fréquence.
2. Oscillateur selon la revendication 1, caractérisé par le fait que l'oscillateur à quartz de haute fréquence (HF) a une fréquence d'oscillation de 4,19 MHz et que l'oscillateur à quartz de basse fréquence (NF) a une fréquence d'oscillation de 32 kHz.
3. Oscillateur selon la revendication 1, caractérisé par le fait que les moyens pour la production d'un signal de correction comprennent un générateur de fréquence de différence (DFG).
4. Oscillateur selon la revendication 3, caractérisé par le fait que le générateur de fréquence de différence est une porte OU-EXCLUSIF suivie d'une porte ET commandée par la fréquence l'oscillateur à quartz de haute fréquence, la sortie de la porte ET étant reliée à un compteur bidirectionnel (ZRZ), le sens de comptage approprié du compteur bidirectionnel étant commandé par un circuit logique (LG, FF1, FFR).
5. Oscillateur selon l'une des revendications 1 - 4, caractérisé par le fait qu'un circuit de compensation en température est connecté avant le diviseur de fréquence programmable (PRFT).
EP80810066A 1979-03-09 1980-02-22 Oscillateur avec un résonateur basse fréquence à quartz Expired EP0015873B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2267/79 1979-03-09
CH226779A CH620087B (de) 1979-03-09 1979-03-09 Oszillator mit einem hochfrequenz-quarzresonator.

Publications (3)

Publication Number Publication Date
EP0015873A1 EP0015873A1 (fr) 1980-09-17
EP0015873B1 EP0015873B1 (fr) 1983-04-13
EP0015873B2 true EP0015873B2 (fr) 1986-06-11

Family

ID=4229764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80810066A Expired EP0015873B2 (fr) 1979-03-09 1980-02-22 Oscillateur avec un résonateur basse fréquence à quartz

Country Status (5)

Country Link
US (1) US4344046A (fr)
EP (1) EP0015873B2 (fr)
JP (1) JPS55124311A (fr)
CH (1) CH620087B (fr)
DE (1) DE3062665D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5973617A (en) * 1996-05-06 1999-10-26 Stmicroelectronics Gmbh Control circuit with adjustable standby oscillator

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH626500B (de) * 1980-01-10 Suisse Horlogerie Oszillator mit digitaler temperaturkompensation.
CH643106B (fr) * 1980-11-26 Suisse Horlogerie Garde-temps comprenant une chaine de diviseurs au rapport de division ajustable.
US4443116A (en) * 1981-01-09 1984-04-17 Citizen Watch Company Limited Electronic timepiece
JPS5843187A (ja) * 1981-09-03 1983-03-12 Fuji Electric Co Ltd 可変周波発振方式
US5428315A (en) * 1985-01-22 1995-06-27 The United States Of America As Represented By The Secreatry Of The Army Method of making radiation hardened quartz crystal oscillators
JPS6238605A (ja) * 1985-08-13 1987-02-19 Nec Corp 水晶発振器
US5179359A (en) * 1992-03-16 1993-01-12 Hughes Aircraft Company Digitally controlled frequency generator including a crystal oscillator
JPH10190568A (ja) * 1996-12-27 1998-07-21 Matsushita Electric Ind Co Ltd 無線受信装置
US5844435A (en) * 1997-03-11 1998-12-01 Lucent Technologies Inc Low power, high accuracy clock circuit and method for integrated circuits
US5831485A (en) * 1997-09-04 1998-11-03 Tektronix, Inc. Method and apparatus for producing a temperature stable frequency using two oscillators
EP1117017B1 (fr) * 2000-01-10 2009-09-09 ETA SA Manufacture Horlogère Suisse Dispositif pour produire un signal ayant une fréquence sensiblement indépendante de la température
EP1421704B1 (fr) * 2001-08-29 2007-11-14 Analog Devices, Inc. Procedes et appareil pour controle d'horloge et d'alimentation dans des systemes sans fil
US7019680B2 (en) * 2003-04-25 2006-03-28 Jackson Gregory P Hand-held, continuously variable, remote controller
FR2854992B1 (fr) * 2003-05-15 2005-07-01 Suisse Electronique Microtech Architecture pour base de temps
EP2525265B1 (fr) * 2011-05-14 2015-06-03 Johnson Controls Automotive Electronics GmbH Procédé de fonctionnement d'un dispositif d'horloge
CN104143961B (zh) * 2014-07-25 2018-01-19 广东大普通信技术有限公司 一种恒温晶体振荡器频率校准方法、装置及系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364439A (en) * 1966-10-07 1968-01-16 Tele Signal Corp Frequency corrected digital clock with memory in phase control loop
JPS5071362A (fr) * 1973-10-24 1975-06-13
JPS6035637B2 (ja) * 1975-06-05 1985-08-15 シチズン時計株式会社 電子時計
GB1570659A (en) * 1976-06-30 1980-07-02 Suwa Seikosha Kk Electronic timepiece
JPS5388762A (en) * 1976-12-27 1978-08-04 Seiko Epson Corp Electronic watch with temperature compensation
JPS5428178A (en) * 1977-08-04 1979-03-02 Seiko Epson Corp Electronic watch
JPS5428177A (en) * 1977-08-04 1979-03-02 Seiko Epson Corp Electronic watch
JPS5550191A (en) * 1978-10-06 1980-04-11 Citizen Watch Co Ltd Electronic timepiece

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5973617A (en) * 1996-05-06 1999-10-26 Stmicroelectronics Gmbh Control circuit with adjustable standby oscillator

Also Published As

Publication number Publication date
JPS6347002B2 (fr) 1988-09-20
JPS55124311A (en) 1980-09-25
US4344046A (en) 1982-08-10
EP0015873B1 (fr) 1983-04-13
DE3062665D1 (en) 1983-05-19
CH620087GA3 (fr) 1980-11-14
CH620087B (de)
EP0015873A1 (fr) 1980-09-17

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