EP0015873A1 - Oscillator with a low frequency quartz resonator - Google Patents

Oscillator with a low frequency quartz resonator Download PDF

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Publication number
EP0015873A1
EP0015873A1 EP80810066A EP80810066A EP0015873A1 EP 0015873 A1 EP0015873 A1 EP 0015873A1 EP 80810066 A EP80810066 A EP 80810066A EP 80810066 A EP80810066 A EP 80810066A EP 0015873 A1 EP0015873 A1 EP 0015873A1
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Prior art keywords
frequency
quartz
resonator
oscillator
low
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EP80810066A
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German (de)
French (fr)
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EP0015873B1 (en
EP0015873B2 (en
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Alphonse Zumsteg
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SSIH Management Services SA
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SSIH Management Services SA
Societe Suisse pour lIindustrie Horlogere Management Services SA
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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 high-frequency quartz resonator, the primary thought being those resonators which are very precise on the one hand and which have a relatively high long-term stability on the other hand.
  • High-frequency quartz resonators with a frequency of 4.19 MHz are known and are used, among other things. used in wristwatches. While the frequency stability, the temperature stability and the long-term behavior (aging) are much cheaper than with the usual low-frequency quartz resonators with a frequency of 32 kHz, on the other hand the power consumption is much higher, so that the currently available batteries have to be replaced more frequently. Particularly with regard to long-term batteries under development with an expected lifespan of 5-10 years, it would be desirable to obtain an oscillator that has all the advantages of a high-frequency oscillator, but with a low power consumption that is essentially the same as that of a low-frequency Oscillator lies.
  • the oscillator which achieves this goal is characterized in that, in order to reduce the power consumption, it has a circuit containing a low-frequency quartz resonator with means for generating a correction signals, which goes to a programmable frequency divider and has an electronic switch for periodically switching the high-frequency quartz resonator.
  • the Mit a beat frequency generator for generating a correction signal.
  • the basic diagram of the oscillator circuit can be seen in FIG.
  • the frequency of 4.19 MHz, 8.38, for example M Hz or higher of the high-frequency resonator HF with a cut according to US Pat. No. 4,071,797 is reduced to 32 kHz in a frequency divider FT and given A to a beat frequency generator SFG.
  • the signal from the low-frequency resonator for example a common quartz resonator with 32 kHz, is also applied to the beat frequency generator at point B.
  • 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 powered by the supply voltage Vs, is controlled by a signal CP from the timer circuit to provide a periodic signal S which periodically switches the high frequency resonator, the frequency divider FT and the beat frequency generator SFG.
  • a switch-on time of at least 16 seconds is necessary in order to obtain a sufficiently precise correction signal each time, so that a resolution of 1. 10 -3 s / d is reached.
  • the switch-off time can be 15 minutes, for example, ie the signal CP is generated every 15 minutes for at least 16 seconds.
  • 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.
  • a temperature com compensation circuit TC are switched on in order to keep the influence of the temperature negligibly small. Since two quartz crystals are already used, digital temperature compensation by means of two quartz resonators is necessary in this case.
  • 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 32 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 / 16 Hz brought.
  • a high-frequency resonator with a frequency of 8.38 MHz, however, one could also choose one of 1/8 Hz.
  • FIG. 3 shows the circuit suitable for FIG. 3.
  • the two signals A 'and B' arrive at an EX-OR gate, which only responds when there is a difference between the two signals, ie as shown in FIG.
  • the logic LG sends a pulse to the flip-flop FF1, which then changes its sign 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 AUS changes over time in terms of accuracy, temperature behavior and aging in accordance with 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 when the temperature changes and the quartz ages, so that the circuit can be simplified considerably.
  • the invention is not limited to the values of 32 kHz on the one hand and 4.19 and 8.38 MHz on the other hand, but that other quartz resonators with other values can also be used.
  • the oscillator described here can wherever high accuracy and favorable temperature and long-term behavior are desired and where the available volume is small. This applies, for example, to a wristwatch or a film camera.
  • 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)

Abstract

Der Oszillator mit einem Schwingquarz mit einer Frequenz von beispielsweise 4,19 MHz weist eine Schaltung auf, die einen Niederfrequenz-Quarzresonator (NF) mit einer Frequenz von 32 kHz enthält und einen Schwebungsfrequenz-Generator (SFG) zum Erzeugen eines Korrektursignals, das auf einen programmierbaren Frequenzteiler (PRFT) geht und einen elektronischen Schalter (ES) zum periodischen Schalten des Hochfrequenz-Quarzresonators (HF). Durch das periodische kurze Einschalten des Hochfrequenz-Quarzschwingers, dessen Frequenzgang mit demjenigen des Niederfrequenz-Quarzes verglichen wird, wird erreicht, dass man einerseits die Vorzüge bei Langzeitstabilität, Temperaturverhalten und Alterung eines Hochfrequenz-Schwingquarzes und andererseits den wesentlich niedrigeren Stromverbrauch eines Niederfrequenz-Quarzes erreicht, wodurch die Lebensdauer einer Batterie wesentlich verlängert werden kann. Ein solcher Quarzresonator ist bestens dazu geeignet, in Filmkameras oder Armbanduhren verwendet zu werden.The oscillator with a quartz crystal with a frequency of 4.19 MHz, for example, has a circuit which contains a low-frequency quartz resonator (NF) with a frequency of 32 kHz and a beat frequency generator (SFG) for generating a correction signal which is based on a programmable frequency divider (PRFT) and an electronic switch (ES) for periodically switching the high-frequency quartz resonator (HF). By periodically switching on the high-frequency quartz oscillator, whose frequency response is compared with that of the low-frequency quartz, it is achieved that, on the one hand, the advantages of long-term stability, temperature behavior and aging of a high-frequency quartz crystal and, on the other hand, the significantly lower power consumption of a low-frequency quartz are achieved , which can significantly extend the life of a battery. Such a quartz resonator is ideally suited to be used in film cameras or wristwatches.

Description

Die vorliegende Erfindung bezieht sich auf einen Oszillator mit einem Hochfrequenz-Quarzresonator, wobei in erster Linie an solche Resonatoren gedacht ist, die einerseits sehr genau sind, und die andererseits eine relativ hohe Langzeitstabilität aufweisen.The present invention relates to an oscillator with a high-frequency quartz resonator, the primary thought being those resonators which are very precise on the one hand and which have a relatively high long-term stability on the other hand.

Hochfrequenz-Quarzresonatoren mit einer Frequenz von 4,19 MHz sind bekannt und werden u.a. in Armbanduhren verwendet. Während die Frequenz-Stabilität, die Temperaturstabilität und das Langzeitverhalten (Alterung) wesentlich günstiger ist als bei den gebräuchlichen Niederfrequenz-Quarzresonatoren mit einer Frequenz von 32 kHz, ist andererseits der Stromverbrauch wesentlich höher, so dass die derzeit erhältlichen Batterien häufiger ausgewechselt werden müssen. Insbesondere im Hinblick auf in der Entwicklung stehende Langzeitbatterien mit einer voraussichtlichen Lebensdauer von 5-10 Jahren wäre es erwünscht, einen Oszillator zu erhalten, der sämliche Vorteile eines Hochfrequenz-Oszillators aufweist, aber mit einem niedrigen Stromverbrauch, der im wesentlichen bei demjenigen eines Niederfrequenz-Oszillators liegt.High-frequency quartz resonators with a frequency of 4.19 MHz are known and are used, among other things. used in wristwatches. While the frequency stability, the temperature stability and the long-term behavior (aging) are much cheaper than with the usual low-frequency quartz resonators with a frequency of 32 kHz, on the other hand the power consumption is much higher, so that the currently available batteries have to be replaced more frequently. Particularly with regard to long-term batteries under development with an expected lifespan of 5-10 years, it would be desirable to obtain an oscillator that has all the advantages of a high-frequency oscillator, but with a low power consumption that is essentially the same as that of a low-frequency Oscillator lies.

Der Oszillator, der dieses Ziel erreicht, zeichnet sick dadurch aus, dass er zwecks Erniedrigung des Stromverbrauchs eine einen Niederfrequenz-Quarzresonator enthaltende Schaltung mit Mitteln zum Erzeugen eines Korrektursignals, das auf einen programmierbaren Frequenzteiler geht und einen elektronischen Schalter zum periodischen Schalten des Hochfrequenz-Quarzresonators aufweist. In einem bevorzugten Ausführungsbeispiel enthalten die Mit- ; tel zum Erzeugen eines Korrektursignals einen Schwebungsfrequenz-Generator.The oscillator which achieves this goal is characterized in that, in order to reduce the power consumption, it has a circuit containing a low-frequency quartz resonator with means for generating a correction signals, which goes to a programmable frequency divider and has an electronic switch for periodically switching the high-frequency quartz resonator. In a preferred embodiment, the Mit; a beat frequency generator for generating a correction signal.

Durch die Verwendung eines Niederfrequenz-Quarzresonators mit niedrigem Stromverbrauch und durch das periodische Einschalten des Hochfrequenz-Quarzresonators ist es sogar möglich, einen Hochfrequenz-Quarzresonator mit höherer als bis jetzt verwendeter Frequenz, beispielsweise mit 8,38 MHz zu verwenden, der bezüglich Temperaturverhalten und Volumen noch bessere Eigenschaften aufweist als der Quarzresonator mit einer Frequenz von 4,19 MHz, falls ein Quarz mit einem Schnitt gemäss US-PS 4,071,797 gewählt wird.By using a low-frequency quartz resonator with low power consumption and by periodically switching on the high-frequency quartz resonator, it is even possible to use a high-frequency quartz resonator with a frequency higher than that used up to now, for example with 8.38 MHz, in terms of temperature behavior and volume has even better properties than the quartz resonator with a frequency of 4.19 MHz if a quartz with a cut according to US Pat. No. 4,071,797 is selected.

Die Erfindung wird nun anhand einer Zeichnung eines Ausführungsbeispiels einer Schaltung näher erläutert werden.The invention will now be explained in more detail with reference to a drawing of an embodiment of a circuit.

Es zeigen

  • Figur 1 eine Blockschaltung eines erfindungsgemässen Oszillators,
  • Figur 2 einen Ausschnitt aus einem Ausführungsbeispiel der Schaltung gemäss Figur 1,
  • Figur 3 schematisch ein Zeitdiagramm eines Impulses von beiden Quarzresonatoren, und
  • Figur 4 eine Blockschaltung des Schwebungsfrequenz-Generators.
Show it
  • FIG. 1 shows a block circuit of an oscillator according to the invention,
  • FIG. 2 shows a section of an exemplary embodiment of the circuit according to FIG. 1,
  • Figure 3 schematically shows a timing diagram of a pulse from both quartz resonators, and
  • Figure 4 is a block circuit of the beat frequency generator.

In Figur 1 erkennt man das Prinzipschema der Oszillatorschaltung. Die Frequenz von beispielsweise 4,19 MHz, 8,38 MHz oder höher des Hochfrequenz-Resonators HF mit einem Schnitt gemäss US-PS 4,071,797 wird in einem Frequenzteiler FT auf 32 kHz heruntergesetzt und bei A auf einen Schwebungsfrequenz-Generator SFG gegeben. Das Signal des Niederfrequenz-Resonators, beispielsweise ein gebräuchlicher Quarzresonator mit 32 kHz wird bei Punkt B ebenfalls auf den Schwebungsfrequenz-Generator gegeben. In diesem wird, wie noch weiter unten näher erläutert werden wird, ein Korrektursignal erzeugt, das auf einen programmierbaren Frequenzteiler PRFT gegeben wird, der ebenfalls vom Niederfrequenzsignal gespeist wird. Falls notwendig, wird in diesem programmierbaren Frequenzteiler das Niederfrequenzsignal korrigiert und auf den Ausgang AUS gegeben, von wo es in die bekannte und hier nicht näher erläuterte Zeitgeberschaltung gelangt. Ein elektronischer Schalter ES, über die Speisespannung Vs gespeist, wird durch ein Signal CP aus der Zeitgeberschaltung gesteuert, um ein periodisches Signal S zu liefern, das den Hochfrequenz-Resonator, den Frequenzteiler FT und den Schwebungsfrequenz-Generator SFG periodisch schaltet. Bei der Verwendung eines 4,19 MHz Hochfrequenz-Quarzes haben Berechnungen gezeigt, dass eine Einschaltzeit von mindestens 16 Sekunden notwendig ist, um jedes Mal ein ausreichend genaues Korrektursignal zu erhalten, damit eine Auflösung von 1 . 10-3 s/d erreicht wird. Die Abschaltzeit kann beispielsweise 15 Minuten betragen, d.h. das Signal CP wird alle 15 Minuten während mindestens 16 Sekunden erzeugt. Dadurch wird die Herabsetzung des Stromverbrauchs des Hochfrequenz-Resonators auf etwa 1/50 erreicht.The basic diagram of the oscillator circuit can be seen in FIG. The frequency of 4.19 MHz, 8.38, for example M Hz or higher of the high-frequency resonator HF with a cut according to US Pat. No. 4,071,797 is reduced to 32 kHz in a frequency divider FT and given A to a beat frequency generator SFG. The signal from the low-frequency resonator, for example a common quartz resonator with 32 kHz, is also applied to the beat frequency generator at point B. In this, as will be explained in more detail below, a correction signal is generated, which is sent to a programmable frequency divider PRFT, which is also fed by the low-frequency signal. If necessary, 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, powered by the supply voltage Vs, is controlled by a signal CP from the timer circuit to provide a periodic signal S which periodically switches the high frequency resonator, the frequency divider FT and the beat frequency generator SFG. When using a 4.19 MHz high-frequency crystal, calculations have shown that a switch-on time of at least 16 seconds is necessary in order to obtain a sufficiently precise correction signal each time, so that a resolution of 1. 10 -3 s / d is reached. 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.

Alle 15 Minuten beginnt ein neuer Lernzyklus und falls sich während dieser Zeit die Freqenz des NF-Generators geändert hat, wird der programmierbare Frequenzteiler PRFT neu eingestellt.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.

Falls eine noch weitergehende Genauigkeit erwünscht ist, kann, wie gestrichelt eingezeichnet, eine Temperaturkompensationsschaltung TC eingeschaltet werden um den Einfluss der Temperatur vernachlässigbar klein zu halten. Da bereits zwei Schwingquarze verwendet werden, drängt sich in diesem Falle eine digitale Temperaturkompensation mit- telt zweier Quarzresonatoren auf.If further accuracy is desired, a temperature com compensation circuit TC are switched on in order to keep the influence of the temperature negligibly small. Since two quartz crystals are already used, digital temperature compensation by means of two quartz resonators is necessary in this case.

In den Figuren 2 -und 4 sind zwei Details eines Ausführungsbeispiels für die Erzeugung des Korrektursignals dargestellt. Die Hochfrequenz von 4,19 oder 8,38 MHz wird durch den ersten Frequenzteiler FT auf 32 kHz herabgesetzt und anschliessend durch einen zweiten Frequenzteiler FT1 auf eine Frequenz von 1/16 Hz. Die Niederfrequenz von 32 kHz wird durch einen Frequenzteiler FT2 ebenfalls auf 1/16 Hz gebracht. Bei einem Hochfrequenz-Resonator mit einer Frequenz von 8,38 MHz könnte man allerdings auch eine solche von 1/8 Hz wählen. Ein direkter Vergleich der beiden Frequenzen von 1/16 Hz wäre, wie sich leicht ausrechnen lässt, zu ungenau und es ist deshalb erforderlich, einen Vergleich anzustellen, bei welchem als Einheit ein Zeitintervall von 1:4,19 MHz = ungefähr 0,2 ps dient. Aus dem Diagramm von Figur 3 kann man entnehmen, dass die Differenz des Impulses bei A' und bei B' genommen wird, wobei die Differenz Δti der beiden Impulsanfänge und die Differenz Δte bei den Impulsenden subtrahiert oder aufsummiert werden, um ein Frequenzkorrektursignal zu geben. In Figur 4 ist die zu Figur 3 passende Schaltung gezeigt. Die beiden Signale A' und B' gelangen zu einem EX-ODER Tor, welches nur bei einer Differenz beider Signale anspricht, d.h. wie in Fig. 3 dargestellt, falls ein Ati und ein Δte existiert. Das Signal aus dem EX-ODER Tor gelangt zu einem UND Tor, an welchem das 4,19 MHz Signal anliegt und gelangt von dort auf einen Zweirichtungszähler ZRZ, dessen Vorzeichen durch einen Flip-Flop FF1 gegeben wird. Im Zweirichtungszähler wird der Unterschied von Δti und A te gebildet, wobei Δte auch grösser als Δ ti sein kann. Um auch in diesem Falle den Zähler richtig zu steuern, gelangt das Signal aus dem Zähler beim Null-Durchgang auf eine Logik LG, ebenso das Signal aus dem Flip-Flop FF1 über den Zustand. Im Falle eines Null-Durchganqs des Zählers gibt die Logik LG einen Impuls an den Flip-Flop FF1, der daraufhin das Vorzeichen wechselt, und dieses Signal in den Zähler eingibt, woraufhin der Zähler in der richtigen Richtung zählt. Ein zweiter Flip-Flop FFR bewirkt die Nullsetzung des Zweirichtungszählers bei Beginn der Messung, wobei die beiden Flip-Flöps FF1 und FFR ihrerseits durch das periodische Signal S vom elektronischen Schalter ES beim Einschalten des Hochfrequenz-Resonators auf Null gesetzt werden. Der Ausgang aus dem Zähler gelangt über einen Dekoder DC auf den programmierbaren Frequenzteiler, ebenso ein Vorzeichensignal von der Logik LG. Auf diese Weise erhält der programmierbare Frequenzteiler stets ein Korrektursignal, das dem Unterschied zwischen dem Frequenzgang des Hochfrequenz- und des Niederfrequenz-Resonators entspricht, so dass sich im Mittel das Ausgangssignal AUS im Langzeitverhalten bezüglich Genauigkeit, Temperaturverhalten und Alterung entsprechend dem Verhalten des Hochfrequenz-Quarzresonators verhält, während der Stromverbrauch in etwa demjenigen des dauernd angeschalteten 32 kHz Niederfrequenz-Quarzresonators entspricht. Die bei der Besprechung von Figur 1 erwähnte Temperaturkompensationsschaltung TE könnte zweckmässigerweise zwischen dem Zweirichtungszähler und dem Dekoder angeschaltet werden.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 32 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 / 16 Hz brought. With a high-frequency resonator with a frequency of 8.38 MHz, however, one could also choose one of 1/8 Hz. A direct comparison of the two frequencies of 1/16 Hz, as can be easily calculated, would be too imprecise and it is therefore necessary to make a comparison in which a time interval of 1: 4.19 MHz = approximately 0.2 ps as a unit serves. It can be seen from the diagram in FIG. 3 that the difference of the pulse at A 'and at B' is taken, the difference Δt i of the two pulse beginnings and the difference Δt e at the pulse ends being subtracted or summed up in order to obtain a frequency correction signal give. FIG. 4 shows the circuit suitable for FIG. 3. The two signals A 'and B' arrive at an EX-OR gate, which only responds when there is a difference between the two signals, ie as shown in FIG. 3, if there is an Ati and a Δt e . The signal from the EX-OR gate arrives at an AND gate at which the 4.19 MHz signal is present and from there reaches a bidirectional counter ZRZ, the sign of which is given by a flip-flop FF1. The difference between Δt i and A t e is formed in the bidirectional counter, where Δt e can also be greater than Δ t i . In order to control the counter correctly in this case as well, the signal from the counter occurs at the zero crossing logic LG, as well as the signal from the flip-flop FF1 on the state. In the event of a zero crossing of the counter, the logic LG sends a pulse to the flip-flop FF1, which then changes its sign 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. In this way, 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 AUS changes over time in terms of accuracy, temperature behavior and aging in accordance with 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.

Man kann es auch einrichten, dass der Frequenzunterschied stets, auch bei Temperaturänderung und Alterung der Quarze, das gleiche Vorzeichen aufweist, so dass die Schaltung wesentlich vereinfacht werden kann.It can also be arranged that the frequency difference always has the same sign, even when the temperature changes and the quartz ages, so that the circuit can be simplified considerably.

Es ist selbstverständlich, dass sich die Erfindung nicht auf die hier angegebenen Werte von 32 kHz einerseits und 4,19 und 8,38 MHz andererseits beschränkt, sondern dass auch andere Quarzresonatoren mit anderen Werten verwendet werden können. Der vorliegend beschriebene Oszillator kann überall dort, wo eine hohe Ganggenauigkeit und ein günstiges Temperatur- und Langzeitverhalten erwünscht ist, und wo das dafür verfügbare Volumen klein ist, verwendet werden. Dies trifft beispielsweise bei einer Armbanduhr oder bei einer Filmkamera zu.It goes without saying that the invention is not limited to the values of 32 kHz on the one hand and 4.19 and 8.38 MHz on the other hand, but that other quartz resonators with other values can also be used. The oscillator described here can wherever high accuracy and favorable temperature and long-term behavior are desired and where the available volume is small. This applies, for example, to a wristwatch or a film camera.

Auch kann die Periode, in welcher der Frequenzvergleicn stattfindet, vom angegebenen Wert verschieden sein; sie ist von der höchsten verfügbaren Frequenz und der gewünschten Auflösung der Einstellung der Frequenz abhängig. Es kann auch ein anderes Intervall gewählt werden, innerhalb welchem der Hochfrequenz-Resonator abgeschaltet ist.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.

Claims (5)

1. Oszillator mit einem Hochfrequenz-Quarzresonator, dadurch gekennzeichnet,
dass er zwecks Erniedrigung des Stromverbrauchs eine einen Niederfrequenz-Quarzresonator (NF) enthaltende Schaltung mit Mitteln (SFG) zur Erzeugung eines Korrektursignals, das der Steuerung eines programmierbaren Frequenzteilers (PRFT) dient und einen elektronischen Schalter (ES) zum periodischen Schalten des Höchfrequenz-Quarzresonators (HF) aufweist.1. oscillator with a high-frequency quartz resonator, characterized in
that it has a low-frequency quartz resonator (NF) containing circuit (SFG) for generating a correction signal, which serves to control a programmable frequency divider (PRFT) and an electronic switch (ES) for periodic switching of the high-frequency quartz resonator in order to reduce the power consumption (HF). 2. Oszillator nach Anspruch 1,
dadurch gekennzeichnet,
dass der Hochfrequenz-Resonator (HF) eine Schwingungsfrequenz von mindestens 4,19 MHz und der Niederfrequenz-Resonator (NF) eine Schwingungsfrequenz von 32 kHz aufweist.2. Oscillator according to claim 1,
characterized,
that the high-frequency resonator (HF) has an oscillation frequency of at least 4.19 MHz and the low-frequency resonator (NF) has an oscillation frequency of 32 kHz. 3. Oszillator nach Anspruch 1,
dadurch gekennzeichnet,
dass die Mittel zur Erzeugung eines Korrektursignals einen Schwebungsfrequenz-Generator (SFG) enthalten.3. Oscillator according to claim 1,
characterized,
that the means for generating a correction signal contain a beat frequency generator (SFG). 4. Oszillator nach Anspruch 3,
dadurch gekennzeichnet,
dass der Schwebunqsfrequenz-Generator ein EX-ODER Tor, gefolgt von einem mit der Frequenz des Hochfrequenz-Resonators gesteuerten UND Tor, dessen Ausqanq mit einem Zweirichtungszähler (ZRZ) verbunden ist, aufweist, wobei eine logische Schaltung (LG, FF1, FFR) den Zweirichtungszähler in die geeignete Zählrichtung schaltet.4. Oscillator according to claim 3,
characterized,
that the beat frequency generator is an EX-OR gate, followed by one with the frequency of the high-frequency Resonators controlled AND gate, the Ausqanq is connected to a bidirectional counter (ZRZ), wherein a logic circuit (LG, FF1, FFR) switches the bidirectional counter in the appropriate counting direction. 5. Oszillator nach einem der Ansprüche 1 - 4,
dadurch gekennzeichnet,
dass vor dem programmierbaren Frequenzteiler (PRFT) eine Temperaturkompensationsschaltung angeschaltet ist.5. Oscillator according to one of claims 1-4,
characterized,
that a temperature compensation circuit is connected in front of the programmable frequency divider (PRFT).
EP80810066A 1979-03-09 1980-02-22 Oscillator with a low frequency quartz resonator Expired EP0015873B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH226779A CH620087B (en) 1979-03-09 1979-03-09 OSCILLATOR WITH A HIGH FREQUENCY QUARTZ RESONATOR.
CH2267/79 1979-03-09

Publications (3)

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

Family

ID=4229764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80810066A Expired EP0015873B2 (en) 1979-03-09 1980-02-22 Oscillator with a low frequency quartz resonator

Country Status (5)

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

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Also Published As

Publication number Publication date
DE3062665D1 (en) 1983-05-19
JPS55124311A (en) 1980-09-25
EP0015873B1 (en) 1983-04-13
CH620087GA3 (en) 1980-11-14
JPS6347002B2 (en) 1988-09-20
US4344046A (en) 1982-08-10
CH620087B (en)
EP0015873B2 (en) 1986-06-11

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