WO1983000237A1 - Electronic apparatus - Google Patents

Electronic apparatus Download PDF

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Publication number
WO1983000237A1
WO1983000237A1 PCT/CH1981/000078 CH8100078W WO8300237A1 WO 1983000237 A1 WO1983000237 A1 WO 1983000237A1 CH 8100078 W CH8100078 W CH 8100078W WO 8300237 A1 WO8300237 A1 WO 8300237A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
capacitor
integrated circuit
resistance
resistor
Prior art date
Application number
PCT/CH1981/000078
Other languages
German (de)
French (fr)
Inventor
Brunhilde Adler-Nitzold
Original Assignee
Adler, Karl
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 Adler, Karl filed Critical Adler, Karl
Priority to EP81901914A priority Critical patent/EP0083336B1/en
Priority to US06/475,165 priority patent/US4616167A/en
Priority to DE8181901914T priority patent/DE3175572D1/en
Priority to JP50234281A priority patent/JPS58501090A/en
Priority to PCT/CH1981/000078 priority patent/WO1983000237A1/en
Publication of WO1983000237A1 publication Critical patent/WO1983000237A1/en

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
    • G04G19/02—Conversion or regulation of current or voltage

Definitions

  • the present invention relates to an electronic device, in particular a portable small device, with a long-term solid-state battery, in particular lithium-iodine battery, at least one integrated circuit and a liquid crystal display, a light-emitting diode display or a motor-driven log-on display.
  • Devices of this type have the advantage that they e.g. get by up to 10 years without changing the battery.
  • an optimization of the feed circuit is necessary.
  • the internal resistance of the batteries is relatively high, and therefore current peaks cannot be taken directly as they occur during switching operations and in particular when a stepping motor is stepping on or when a light-emitting diode display is switched on temporarily without the active area of the battery becoming prohibitively large choose.
  • the working voltage is 1.5 V for the technically cheapest and also for the quality of manufacturing integrated circuits.
  • the average operating current in the above-mentioned application ranges today is approx. 2-5 ⁇ A, which with a battery capacity of 300-400 mAh means that it has been used for over 10 years.
  • the aim of the present invention is to help the use of long-term solid-state batteries of the type mentioned, for example lithium-iodine batteries, in small electronic portable devices, such as computers and watches, to make a breakthrough.
  • This is achieved in that the power supply to at least the integrated circuit takes place via a series resistor with a voltage drop of at least approximately 1.3 V, and in that a capacitor in the size of 5 to 10 ⁇ F is provided for delivering current peaks.
  • the voltage of the battery is adapted to the integrated circuit, and current peaks are supplied by a capacitor in such a way that no voltage breakdown on the integrated circuit and thus malfunctions can occur.
  • a series resistor should preferably be selected, the value of which exceeds that of the internal resistance of the battery by a multiple. Precisely under these conditions, however, it is now important to keep the current in the series resistor at an average value without significant fluctuations in order to avoid impermissible voltage fluctuations at the consumers, in particular at the integrated circuit.
  • FIG. 1 shows a schematic top view of a module of the device, with an embodiment variant
  • FIG. 2 shows a schematic section of the module
  • FIG. 3 shows the circuit diagram
  • the module shown in FIGS. 1 and 2 has a flat lithium-iodine battery, above which a display unit 2 is arranged, which is not shown in FIG. 1.
  • the switching elements in particular an integrated circuit 3, a quartz crystal 4, a capacitor 5, two resistors R1 and R2, a changeover switch 6 with contacts 6a, 6b and 6c, a control switch 7 with contacts 7a to 7d and a light-emitting diode 8.
  • the elements are connected to one another in the manner shown, contacts 9 and 10 being connected to the positive or negative battery terminals.
  • a holder 11 carries the switching elements, and the module is held together by means of a profile ring 12.
  • FIG. 1 schematically shows an embodiment variant in dashed lines, which instead of a liquid crystal or light-emitting diode display according to FIG. 2 has a stepping motor 13 with an associated, special integrated circuit 14.
  • the integrated circuit is fed by the positive battery adhesive via the resistor R1, which generates a voltage drop of 1.3 V.
  • the capacitor 5 is charged via the contacts 6a and 6c.
  • the contact 6a is moved to the contact 6b by means of a pusher (not shown), with which the display is fed from the capacitor 5 for a sufficiently long time to allow a reading.
  • the battery is not burdened by the relatively high current for the display and there is hardly any change in voltage on the integrated circuit which could lead to malfunctions.
  • the contacts 7a and / or 7c can be actuated by means of pushers, also not shown, "in order to emit control pulses to control inputs of the integrated circuit via the contacts 7b or 7d.
  • the resistor R2 with a value of 250 to 500 ohms is connected to the drive circuit of the stepping motor 13.
  • stepping switching pulses reach the stepping motor from the capacitor, and experience has shown that depending on the motor type, a capacitor of 5 to 10 ⁇ F ensures safe operation is.
  • a capacitor takes up very little space and can easily be accommodated in devices of virtually any size, for example in electronic wristwatches.
  • the integrated circuit 14 is designed for the full battery voltage of 2.8 V.
  • the circuit can also be implemented in such a way that the series resistor (R1) is reduced during the switching on of the display, in that a special switch together with the control switch for switching on the display connects the resistor R1 in parallel with a further resistor .
  • the series resistor R1 can have a value of 300 kOh, for example, while the bypass resistor has a value of 150 kOhm.
  • FIG. 3 corresponding parts are identified in the same way as in FIG. 1, although a single integrated circuit 3 is shown, which in the schematically indicated manner either for operating a liquid crystal display (LCD), a light-emitting diode display 2 (LED) or a stepper motor 13 can serve.
  • FIG. 3 also shows intermediate contacts 7c and 7f of the switch 7, which are connected to the battery 1 via the resistor R2. As indicated in FIG. 3 by a solid and dotted line, the resistor R2 in the light-emitting diode display is connected upstream of the contacts 7e and 7f and then has, for example, the above-mentioned value of 150 kOhm.
  • the resistor R13 connected upstream of the stepping motor 13 has the value mentioned, for example 250 to 500 ohms.
  • the integrated circuit 3 is supplied with current via the reduced resistor R2 in order to compensate for a voltage drop across the capacitor 5.
  • the drive pulses are relatively very short.
  • the volume of the battery regardless of its shape, is including a protective capsule, for example 1.2 cm with a capacity of 350 mAh. With a maximum consumption of 4-10 ⁇ " A you get a lifespan of about 10 years.
  • the diameter of the battery in Figures 1 and 2 is e.g. 25 mm and the height 2.5 mm.
  • a corresponding flat battery has e.g. a height of 3 mm and an area of 22 x 17 mm.
  • the module according to Figures 1 and 2 has e.g. a total height of 6.7 mm with a diameter of 30 mm.
  • FIG. 3 is also to be understood purely schematically.
  • the drive impulses for the stepping motor 13 are also carried out via the integrated circuit holder 3.
  • the capacitor 5 is then to be connected directly in parallel to the supply terminals of the integrated circuit, as indicated by the broken line 15 in FIG. 3, in which case the Vorwi ⁇ the resistor R1 is connected between the battery 1 and the capacitor 5.
  • the contact 6c is omitted and the resistors R2 or R13, if present, are connected directly to the capacitor 5.
  • a changeover switch 16 can be provided which enables the consumers to be separated from the capacitor 5.
  • the capacitor is in this case connected to a resistor 17, the value of which is selected such that it maintains the capacitor voltage at the desired nominal voltage of, for example, 1.5 V.

Abstract

The electronic apparatus is provided with a long life dry battery (1), for example a lithium-iodine battery, of which the voltage is lowered from 2.8 volts to 1.5 volts by a series resistor (R1) for the supply of a conventional integrated circuit (3). There is provided a capacitor (5) which is continuously charged by the battery and suppresses the current peaks. The resistor is substantially higher than the internal resistance of the battery. It is thus possible to supply by means of a reduced size battery a small portable apparatus, such as a watch or a calculator, during more than 10 years for example.

Description

Elektronisches Gerät Electronic device
Die vorliegende Erfindung betrifft ein elektronisches Ge¬ rät, insbesondere tragbares Kleingerät, mit einer Langzeit- Festkörperbatterie, insbesondere Lithium-Jod-Batterie, min¬ destens einer integrierten Schaltung und einer Flüssigkri¬ stallanzeige, einer Leuchtdiodenanzeige oder einer motoran- getriebenen Ananloganzeige. Geräte dieser Art weisen den Vorteil auf, dass sie z.B. bis zu 10 Jahren ohne Batterie- Wechsel auskommen. Will man jedoch kleinste Abmessungen er¬ zielen, ist eine Optimierung des Speisestromkreises erfor¬ derlich. Der Innenwiderstand der Batterien ist relativ hoch, und es können daher nicht direkt Stromspitzen entnom¬ men werden wie sie bei Schaltvorgängen und insbesondere bei Fortschaltimpulsen eines Schrittschaltmotors oder beim vor- übergehenden Einschalten einer Leuchtdiodenanzeige auftre¬ ten, ohne die aktive Fläche der Batterie untragbar gross zu wählen.The present invention relates to an electronic device, in particular a portable small device, with a long-term solid-state battery, in particular lithium-iodine battery, at least one integrated circuit and a liquid crystal display, a light-emitting diode display or a motor-driven log-on display. Devices of this type have the advantage that they e.g. get by up to 10 years without changing the battery. However, if the smallest dimensions are to be achieved, an optimization of the feed circuit is necessary. The internal resistance of the batteries is relatively high, and therefore current peaks cannot be taken directly as they occur during switching operations and in particular when a stepping motor is stepping on or when a light-emitting diode display is switched on temporarily without the active area of the battery becoming prohibitively large choose.
Es ist bekannt, dass die erwähnten Langzeit-Festkδrperbat- terien oder Solid-State-Batterien eine Spannung von 2,8 V aufweisen und die Spannungskurve entsprechend dem innerenIt is known that the long-term solid-state batteries or solid-state batteries mentioned have a voltage of 2.8 V and the voltage curve corresponds to the inner one
Widerstand im Verhältnis zum Lastwiderstand verläuft. Der innere Widerstand ist sehr hoch, so dass keine Eigenentla- düng stattfindet, was ein entscheidendes Merkmal dieser Batterien ist. Der praktische günstigste Widerstand ergibt sich bei ca. 50 kOhm. In diesem Zusammenhang wird auf die Ausführungen der Herstellerfirma Catalyst Research Corp. , und deren USA-Patente Nrn. 3,660,163, 3,674,562 und 3,723,183 verwiesen.Resistance runs in relation to the load resistance. The internal resistance is very high, so that there is no self-discharge, which is a crucial feature of these batteries. The practical cheapest resistance is around 50 kOhm. In this context, the explanations of the manufacturer Catalyst Research Corp. , and their U.S. Patent Nos. 3,660,163, 3,674,562 and 3,723,183.
Es ist weiterhin bekannt, dass für die technisch günstigste und auch für die Qualität entscheidende Herstellungsart von integrierten Schaltungen die Arbeitsspannung bei 1 ,5 V liegt. Der mittlere Betriebsstrom in den genannten Anwen¬ dungsbereichen liegt heute bei ca. 2-5 μA, was bei einer Batteriekapazität von 300-400 mAh eine über 10-jährige Le-It is also known that the working voltage is 1.5 V for the technically cheapest and also for the quality of manufacturing integrated circuits. The average operating current in the above-mentioned application ranges today is approx. 2-5 μA, which with a battery capacity of 300-400 mAh means that it has been used for over 10 years.
OMPI bensdauer ergibt. Obwohl bei höheren Spannungen sich die Funktionen der integrierten Schaltungen praktisch nicht ändern, erhält man einen extrem hohen Stromanstieg bis ca. 50 μA, was den Gebrauch der Langzeitbatterien praktisch verun öglicht.OMPI life time results. Although the functions of the integrated circuits practically do not change at higher voltages, an extremely high current rise of up to approx. 50 μA is obtained, which practically makes the use of the long-term batteries impossible.
Eine Auslegung der integrierten Schaltungen auf eine Be¬ triebsspannung von 2,8 V würde einerseits den Nachteil bringen, dass sämtliche Produktionsketten in der Kalkulato- renbranche oder auch bei Uhren geändert werden müssten und weiterhin die Qualität wiederum absinken würde. Unabhängig davon jedoch, wird bei bestimmten Arten dieser Produkte ei¬ ne separate Funktion benötigt, die einen relativ geringen inneren Widerstand der Stromquelle voraussetzt, der bei den konventionellen Batterien vorliegt, jedoch auch bei Anpas¬ sung der integrierten Schaltung auf 2,8 V Betriebsspannung durch eine Lithium-Jod-Batterie mit Fest-Elektrolyt nicht gegeben ist. Aus diesen kurz- geschilderten Gründen konnten sich bisher die genannten Langzeit-Batterien für die ge- nannten Anwendungsbereiche nicht durchsetzen. Es wird, um Irrtümer zu vermeiden, darauf hingewiesen, dass Lithium-Jod- Batterien mit Flüssigelektrolyt existieren. Sie haben ledig¬ lich den Vorteil, kurzfristig sehr grosse Energien abzuge¬ ben, sind jedoch mit den gleichen Nachteilen behaftet wie alle Batterien ^mit Flüssigelektrόlyt, -d.h. sie weisen kurze Lebensdauer auf.Designing the integrated circuits for an operating voltage of 2.8 V would, on the one hand, bring the disadvantage that all production chains in the calculating industry or also for clocks would have to be changed and the quality would further decrease again. Irrespective of this, however, certain types of these products require a separate function which requires a relatively low internal resistance of the current source, which is present in conventional batteries, but also when the integrated circuit is adapted to an operating voltage of 2.8 V by a lithium-iodine battery with solid electrolyte is not available. For these reasons, which have been briefly described, the long-term batteries mentioned above have not been able to establish themselves in the above-mentioned areas of application. In order to avoid errors, it is pointed out that lithium-iodine batteries with liquid electrolyte exist. You have ledig¬ Lich the advantage ben abzuge¬ shortly very large energies, however, suffer from the same drawbacks as all batteries ^ with Flüssigelektrόlyt she -dh have short life.
Es ist das Ziel vorliegender Erfindung, der Anwendung von Langzeit-Festkδrperbatterien der genannten Art, z.B. Lithi- um-Jod-Batterien, in elektronischen tragbaren Kleingeräten, wie Rechnern und Uhren zum Durchbruch zu verhelfen. Das wird dadurch erreicht, dass die Stromversorgung mindestens der integrierten Schaltung über einen Vorwiderstand mit ei¬ nem Spannungsabfall von mindestens annähernd 1,3 V erfolgt, und dass zur Abgabe von Stromspitzen ein Kondensator in der Grosse von 5 bis 10 μF vorgesehen ist. Damit wird nun einer- seits die Spannung der Batterie derselben der integrierten Schaltung angepasst, und Stromspitzen werden von einem Kon¬ densator geliefert, derart, dass kein Spannungszusammen¬ bruch an der integrierten Schaltung und damit Funktionsstδ- rungen auftreten können. Es ist bekannt, dass der Innenwi¬ derstand der Batterie im Laufe der Zeit der Ladungsentnahme entsprechend ansteigt:. Um trotzdem mindestens an der inte¬ grierten Schaltung praktisch konstante Betriebsspannung zu erzielen, ist vorzugsweise ein Vorwiderstand zu wählen, dessen Wert denjenigen des Innenwiderstandes der Batterie um ein Mehrfaches übersteigt. Gerade unter diesen Voraus¬ setzungen ist es nun aber wichtig, den Strom im Vorwider¬ stand ohne erhebliche Schwankungen auf einem Mittelwert zu halten, um unzulässige Spannungsschwankungen an den Ver- brauchern, insbesondere an der integrierten Schaltung zu vermeiden.The aim of the present invention is to help the use of long-term solid-state batteries of the type mentioned, for example lithium-iodine batteries, in small electronic portable devices, such as computers and watches, to make a breakthrough. This is achieved in that the power supply to at least the integrated circuit takes place via a series resistor with a voltage drop of at least approximately 1.3 V, and in that a capacitor in the size of 5 to 10 μF is provided for delivering current peaks. So now one- On the one hand, the voltage of the battery is adapted to the integrated circuit, and current peaks are supplied by a capacitor in such a way that no voltage breakdown on the integrated circuit and thus malfunctions can occur. It is known that the internal resistance of the battery increases correspondingly over the course of the time the charge is removed: In order to nevertheless achieve a practically constant operating voltage at least on the integrated circuit, a series resistor should preferably be selected, the value of which exceeds that of the internal resistance of the battery by a multiple. Precisely under these conditions, however, it is now important to keep the current in the series resistor at an average value without significant fluctuations in order to avoid impermissible voltage fluctuations at the consumers, in particular at the integrated circuit.
Anhand der Zeichnung wird nun ein Ausführungsbeispiel eines erfindungsgeroässen elektronischen Gerätes erläutert.An embodiment of an electronic device according to the invention will now be explained with reference to the drawing.
Figur 1 zeigt eine schematische Draufsicht auf einen Modul des Gerätes, mit einer Ausführungsvari¬ ante,FIG. 1 shows a schematic top view of a module of the device, with an embodiment variant,
Figur 2 zeigt einen schematischen Schnitt des Moduls undFigure 2 shows a schematic section of the module and
Figur 3 zeigt das Schaltschema.Figure 3 shows the circuit diagram.
Der in Figuren 1 und 2 dargestellte Modul weist eine flache Lithium-Jod-Batterie auf, über welcher eine Anzeigeeinheit 2 angeordnet ist, die in Figur 1 nicht dargestellt ist. Zwi¬ schen den Teilen 1 und 2 befinden sich die Schaltelemente, insbesondere eine integrierte Schaltung 3, ein Schwingquarz 4, ein Kondensator 5, zwei Widerstände R1 und R2, ein Um¬ schalter 6 mit Kontakten 6a, 6b und 6c, ein Steuerschalter 7 mit Kontakten 7a bis 7d und eine Leuchtdiode 8. Die Ele¬ mente sind in der dargestellten Weise miteinander verbun¬ den, wobei Kontakte 9 und 10 mit den positiven, bzw. nega¬ tiven Batterieklemmen verbunden sind. Ein Halter 11 trägt die Schaltelemente, und der Modul ist mittels eines Profil¬ rings 12 zusammengehalten.The module shown in FIGS. 1 and 2 has a flat lithium-iodine battery, above which a display unit 2 is arranged, which is not shown in FIG. 1. Between the parts 1 and 2 are the switching elements, in particular an integrated circuit 3, a quartz crystal 4, a capacitor 5, two resistors R1 and R2, a changeover switch 6 with contacts 6a, 6b and 6c, a control switch 7 with contacts 7a to 7d and a light-emitting diode 8. The elements are connected to one another in the manner shown, contacts 9 and 10 being connected to the positive or negative battery terminals. A holder 11 carries the switching elements, and the module is held together by means of a profile ring 12.
In Figur 1 ist schematisch eine Ausführungsvariante in ge¬ strichelten Linien angedeutet, die anstelle einer Flüssig- kristall- oder Leuchtdiodenanzeige gemäss Figur 2 einen Schrittmotor 13 mit zugeordneter, besonderer integrierter Schaltung 14 aufweist.1 schematically shows an embodiment variant in dashed lines, which instead of a liquid crystal or light-emitting diode display according to FIG. 2 has a stepping motor 13 with an associated, special integrated circuit 14.
Im dargestellten Ruhezustand wird der integrierte Strom- kreis von der positiven Batteriekle me über den Widerstand R1 , der einen Spannungsabfall von 1 ,3 V erzeugt, gespeist. Zugleich wird über die Kontakte 6a und 6c der Kondensator 5 geladen. Zur Betätigung der in Figur 1 schematisch durch die Leuchtdiode 8 angedeuteten Anzeige wird der Kontakt 6a mittels eines nicht dargestellten Drückers an den Kontakt 6b umgelegt, womit die Anzeige aus dem Kondensator 5 genü¬ gend lange gespeist wird, um eine Ablesung zu erlauben. Da¬ bei wird also die Batterie durch den relativ hohen Strom für die Anzeige nicht belastet und es tritt kaum eine Span- nungsänderung an der integrierten Schaltung ein, welche zu Fehlfunktionen führen könnte. Mittels ebenfalls nicht dar¬ gestellter Drücker können die Kontakte 7a und/oder 7c betä¬ tigt werden," um über die Kontakte 7b, bzw. 7d Steuerimpulse an Steuereingänge der integrierten Schaltung abzugeben.In the idle state shown, the integrated circuit is fed by the positive battery adhesive via the resistor R1, which generates a voltage drop of 1.3 V. At the same time, the capacitor 5 is charged via the contacts 6a and 6c. In order to actuate the display indicated schematically in FIG. 1 by the light-emitting diode 8, the contact 6a is moved to the contact 6b by means of a pusher (not shown), with which the display is fed from the capacitor 5 for a sufficiently long time to allow a reading. The battery is not burdened by the relatively high current for the display and there is hardly any change in voltage on the integrated circuit which could lead to malfunctions. The contacts 7a and / or 7c can be actuated by means of pushers, also not shown, "in order to emit control pulses to control inputs of the integrated circuit via the contacts 7b or 7d.
Der Widerstand R2 mit einem Wert von 250 bis 500 Ohm ist in den Antriebsstromkreis des Schrittmotors 13 geschaltet. Bei dieser Ausführungsvariante gelangen Schrittschaltimpulse aus dem Kondensator an den Schrittschaltmotor, und die Er- fahrung hat gezeigt, dass je nach Motortyp mit einem Konden¬ sator von 5 bis 10 μF ein sicherer Betrieb gewährleistet ist. Ein solcher Kondensator beansprucht sehr wenig Raum und kann ohne weiteres in praktisch beliebig kleinen Gerä¬ ten, z.B. in elektronischen Armbanduhren, untergebracht werden. Der integrierte Kreis 14 ist für die volle Batte- riespannung von 2,8 V ausgelegt.The resistor R2 with a value of 250 to 500 ohms is connected to the drive circuit of the stepping motor 13. In this embodiment variant, stepping switching pulses reach the stepping motor from the capacitor, and experience has shown that depending on the motor type, a capacitor of 5 to 10 μF ensures safe operation is. Such a capacitor takes up very little space and can easily be accommodated in devices of virtually any size, for example in electronic wristwatches. The integrated circuit 14 is designed for the full battery voltage of 2.8 V.
Beim obenerwähnten Ausführungsbeispiel mit Leuchtdiodenan¬ zeige kann die Schaltung auch so ausgeführt werden, dass während der Einschaltung der Anzeige der Vorwiderstand (R1) verringert wird, indem ein besonderer Schalter zusammen mit dem Steuerschalter zur Einschaltung der Anzeige dem Wider¬ stand R1 einen weiteren Widerstand parallelschaltet. Dabei kann der Vorwiderstand R1 beispielsweise einen Wert von 300 kOh aufweisen, während der Ueberbrückungswiderstand einen solchen von 150 kOhm aufweist.In the above-mentioned exemplary embodiment with light-emitting diode display, the circuit can also be implemented in such a way that the series resistor (R1) is reduced during the switching on of the display, in that a special switch together with the control switch for switching on the display connects the resistor R1 in parallel with a further resistor . The series resistor R1 can have a value of 300 kOh, for example, while the bypass resistor has a value of 150 kOhm.
In Figur 3 sind entsprechende Teile gleich bezeichnet wie in Figur 1 , wobei allerdings eine einzige integrierte Schal¬ tung 3 gezeigt ist, die in der schematisch angedeuteten Weise entweder zum Betrieb einer Flüssigkristallanzeige (LCD) einer Leuchtdiodenanzeige 2 (LED) oder eines Schritt¬ motors 13 dienen kann. In Figur 3 sind zusätzlich Zwischen¬ kontakte 7c und 7f des Schalters 7 dargestellt, die über den Widerstand R2 mit der Batterie 1 verbunden sind. Wie in Figur 3 durch ein in ausgezogenen und punktierten Linien angedeutet ist, ist der Widerstand R2 bei Leuchtdiodenan¬ zeige den Kontakten 7e und 7f vorgeschaltet und weist dann z.B. den obenerwähnten Wert von 150 kOhm auf. Der dem Schrittschaltmotor 13 vorgeschaltete Widerstand R13 weist den erwähnten Wert von beispielsweise 250 bis 500 Ohm auf. Wie bereits erwähnt, wird beim Betätigen eines der Funk¬ tionsschalter 7a oder 7c der integrierten Schaltung 3 Strom über den herabgesetzten Widerstand R2 zugeführt, um einen Spannungsabfall am Kondensator 5 wettzumachen. Im Falle der Flüssigkristallanzeige LCD sind keine solchen Massnahmen erforderlich und auch nicht im Falle des Schrittmotors 13, wo die Antriebsimpulse relativ sehr kurz sind.In FIG. 3, corresponding parts are identified in the same way as in FIG. 1, although a single integrated circuit 3 is shown, which in the schematically indicated manner either for operating a liquid crystal display (LCD), a light-emitting diode display 2 (LED) or a stepper motor 13 can serve. FIG. 3 also shows intermediate contacts 7c and 7f of the switch 7, which are connected to the battery 1 via the resistor R2. As indicated in FIG. 3 by a solid and dotted line, the resistor R2 in the light-emitting diode display is connected upstream of the contacts 7e and 7f and then has, for example, the above-mentioned value of 150 kOhm. The resistor R13 connected upstream of the stepping motor 13 has the value mentioned, for example 250 to 500 ohms. As already mentioned, when one of the function switches 7a or 7c is actuated, the integrated circuit 3 is supplied with current via the reduced resistor R2 in order to compensate for a voltage drop across the capacitor 5. In the case of the liquid crystal display LCD, no such measures are necessary, and also not in the case of the stepping motor 13. where the drive pulses are relatively very short.
Das Volumen der Batterie, gleich welcher Form, beträgt ein- schliesslich Schutzkapsel, z.B. 1 ,2 cm bei einer Kapazität von 350 mAh. Bei einem maximalen Verbrauch von 4-10~" A er¬ hält man eine Lebensdauer von ca. 10 Jahren.The volume of the battery, regardless of its shape, is including a protective capsule, for example 1.2 cm with a capacity of 350 mAh. With a maximum consumption of 4-10 ~ " A you get a lifespan of about 10 years.
Der Durchmesser der Batterie in Figuren 1 und 2 beträgt z.B. 25 mm und die Höhe 2,5 mm. Eine entsprechende Flach- batterie weist z.B. eine Höhe von 3 mm und eine Fläche von 22 x 17 mm auf.The diameter of the battery in Figures 1 and 2 is e.g. 25 mm and the height 2.5 mm. A corresponding flat battery has e.g. a height of 3 mm and an area of 22 x 17 mm.
Das Modul nach Figuren 1 und 2 weist z.B. eine totale Höhe von 6,7 mm auf mit einem Durchmesser von 30 mm.The module according to Figures 1 and 2 has e.g. a total height of 6.7 mm with a diameter of 30 mm.
Wie bereits erwähnt, ist auch Fig. 3 rein schematisch auf¬ zufassen. Normalerweise werden auch die Antriebsimpulse für den Schrittschaltmotor 13 über die integrierte Sςhaltung 3 geführt. Da jedoch Spitzenstrδme nicht über den relativ ho- hen Widerstand Rl geleitet werden können, ist dann der Kon¬ densator 5 direkt parallel an die Speiseklemmen der inte¬ grierten Schaltung anzuschliessen, wie die gestrichelte Linie 15 in Fig. 3 angedeutet, in welchem Falle der Vorwi¬ derstand R1 zwischen die Batterie 1 und den Kondensator 5 geschaltet ist. Der Kontakt 6c entfällt in diesem Falle und die Widerstände R2 oder R13, sofern vorhanden, sind direkt .an den Kondensator 5 angeschlossen.As already mentioned, FIG. 3 is also to be understood purely schematically. Normally, the drive impulses for the stepping motor 13 are also carried out via the integrated circuit holder 3. However, since peak currents cannot be conducted via the relatively high resistance R1, the capacitor 5 is then to be connected directly in parallel to the supply terminals of the integrated circuit, as indicated by the broken line 15 in FIG. 3, in which case the Vorwi¬ the resistor R1 is connected between the battery 1 and the capacitor 5. In this case, the contact 6c is omitted and the resistors R2 or R13, if present, are connected directly to the capacitor 5.
Wie in Fig. 3 angedeutet, kann ein Umschalter 16 vorgesehen sein, der die Verbraucher vom Kondensator 5 zu trennen ge¬ stattet. Der Kondensator wird hierbei an einen Widerstand 17 gelegt, dessen Wert so gewählt ist, dass er die Konden¬ satorspannung auf der gewünschten Nennspannung von bei¬ spielsweise 1,5 V hält. As indicated in FIG. 3, a changeover switch 16 can be provided which enables the consumers to be separated from the capacitor 5. The capacitor is in this case connected to a resistor 17, the value of which is selected such that it maintains the capacitor voltage at the desired nominal voltage of, for example, 1.5 V.

Claims

PATENTANSPRUECHE PATENT CLAIMS
1. Elektronisches Gerät, insbesondere tragbares Kleingerät, mit einer Langzeit-Festkδrperbatterie, insbesondere- Lithium-Jod-Batterie, einer integrierten Schaltung und einer Flüssigkristallanzeige, einer Leuchtdiodenanzeige oder einer motorangetriebenen Analoganzeige, dadurch gekennzeichnet, dass die Stromversorgung mindestens der integrierten Schaltung über einen Vorwiderstand mit einem Spannungs¬ abfall von mindestens annähernd 1,3 V erfolgt, und dass zur Abgabe von Stromspitzen ein Kondensator in der Gros¬ se von 5 bis 10 μF vorgesehen ist.1. Electronic device, in particular portable small device, with a long-term solid-state battery, in particular lithium-iodine battery, an integrated circuit and a liquid crystal display, a light-emitting diode display or a motor-driven analog display, characterized in that the power supply at least the integrated circuit via a series resistor with a voltage drop of at least approximately 1.3 V, and that a capacitor in the size of 5 to 10 μF is provided for delivering current peaks.
2. Gerät nach Anspruch 1, dadurch gekennzeichnet, dass der Vorwiderstand einen Wert aufweist, der ein Mehr¬ faches desjenigen des Innenwiderstandes der Batterie be- trägt.2. Device according to claim 1, characterized in that the series resistor has a value which is a multiple of that of the internal resistance of the battery.
3. Gerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Vorwiderstand bei einem Innenwiderstand der Bat- terie von 50 kOhm einen Wert von 300 kOhm aufweist.3. Device according to claim 1 or 2, characterized in that the series resistor has a value of 300 kOhm with an internal resistance of the battery of 50 kOhm.
4. Gerät nach einem der Ansprüche 1 - 3, dadurch gekennzeichnet, dass der Kondensator auf die volle Batteriespannung auf- geladen wird und Spitzenstrδme über besondere Kreise ge¬ führt werden.4. Device according to one of claims 1-3, characterized in that the capacitor is charged to the full battery voltage and peak currents are conducted via special circuits.
5. Gerät nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, dass ein Schalter zur Entnahme von Spitzenstrδmen aus dem Kondensator vorgesehen ist. 5. Device according to one of claims 1-4, characterized in that a switch is provided for removing peak currents from the capacitor.
6. Gerät nach einem der Ansprüche 1 - 5, . dadurch gekennzeichnet, dass Schaltmittel zur Herabsetzung des Vorwiderstandes während des Auftretens von Spitzenstromen vorgesehen sind.6. Device according to one of claims 1-5,. characterized in that switching means are provided for reducing the series resistance during the occurrence of peak currents.
7. Gerät nach Anspruch 6, mit einem Steuerschalter, dadurch .gekennzeichnet, dass der Steuerschalter Kontakte zur Widerstandsumschal- tung im Speisestromkreis der integrierten Schaltung auf¬ weist.7. Apparatus according to claim 6, with a control switch, characterized in that the control switch has contacts for switching the resistance in the supply circuit of the integrated circuit.
8. Gerät nach Anspruch 1, dadurch gekennzeichnet, dass ein Kondensator direkt mit den Speiseklemmen der integrierten Schaltung verbunden ist, und dass der .Vor¬ widerstand zwischen die Batterie und den Kondensator ge¬ schaltet ist. 8. Apparatus according to claim 1, characterized in that a capacitor is connected directly to the supply terminals of the integrated circuit, and that the .Vor¬ resistance is switched between the battery and the capacitor.
PCT/CH1981/000078 1981-07-13 1981-07-13 Electronic apparatus WO1983000237A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP81901914A EP0083336B1 (en) 1981-07-13 1981-07-13 Electronic apparatus
US06/475,165 US4616167A (en) 1981-07-13 1981-07-13 Electronic apparatus
DE8181901914T DE3175572D1 (en) 1981-07-13 1981-07-13 Electronic apparatus
JP50234281A JPS58501090A (en) 1981-07-13 1981-07-13 electronic equipment
PCT/CH1981/000078 WO1983000237A1 (en) 1981-07-13 1981-07-13 Electronic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH1981/000078 WO1983000237A1 (en) 1981-07-13 1981-07-13 Electronic apparatus

Publications (1)

Publication Number Publication Date
WO1983000237A1 true WO1983000237A1 (en) 1983-01-20

Family

ID=4538418

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1981/000078 WO1983000237A1 (en) 1981-07-13 1981-07-13 Electronic apparatus

Country Status (5)

Country Link
US (1) US4616167A (en)
EP (1) EP0083336B1 (en)
JP (1) JPS58501090A (en)
DE (1) DE3175572D1 (en)
WO (1) WO1983000237A1 (en)

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CH681130GA3 (en) * 1991-07-12 1993-01-29 Small electronic watch e.g. wrist watch - has voltage divider in opening on base side of watch movement and 3 volt battery arranged between base and watch movement

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US6087811A (en) * 1998-12-09 2000-07-11 Analog Modules, Inc. Pulsed-output power supply with high power factor
GB9926609D0 (en) * 1999-11-11 2000-01-12 Koninkl Philips Electronics Nv Method of,and circuit for,controlling the discharge of a battery
US6249109B1 (en) * 2000-03-21 2001-06-19 Nokia Mobile Phones Limited Heat transfer from active high drop regulator
GB2423199B (en) * 2005-02-11 2009-05-13 Pa Consulting Services Power supply systems for electrical devices
DE102008003811A1 (en) * 2008-01-10 2009-07-23 Siemens Aktiengesellschaft Battery operated danger detector with power buffer device

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Publication number Priority date Publication date Assignee Title
CH681130GA3 (en) * 1991-07-12 1993-01-29 Small electronic watch e.g. wrist watch - has voltage divider in opening on base side of watch movement and 3 volt battery arranged between base and watch movement

Also Published As

Publication number Publication date
US4616167A (en) 1986-10-07
JPS58501090A (en) 1983-07-07
DE3175572D1 (en) 1986-12-11
EP0083336A1 (en) 1983-07-13
EP0083336B1 (en) 1986-11-05

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