EP0776090B1 - Circuit for cyclically driving several electric consumers - Google Patents
Circuit for cyclically driving several electric consumers Download PDFInfo
- Publication number
- EP0776090B1 EP0776090B1 EP96117383A EP96117383A EP0776090B1 EP 0776090 B1 EP0776090 B1 EP 0776090B1 EP 96117383 A EP96117383 A EP 96117383A EP 96117383 A EP96117383 A EP 96117383A EP 0776090 B1 EP0776090 B1 EP 0776090B1
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- European Patent Office
- Prior art keywords
- frequency
- switch
- output
- oscillator
- pulse
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- 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.)
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-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
- G08B5/38—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources using flashing light
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/155—Coordinated control of two or more light sources
Definitions
- the invention relates to a circuit arrangement for cyclical activation of several consumers, with one Basic circuit that contains an oscillator and on several outputs successively generated pulses, the oscillator being a frequency-determining component having.
- Circuit arrangements with which consumers are known cyclically controlled in the form of light emitting diodes are, for example used in displays or in jewelry.
- the LEDs are controlled by a basic circuit, which, for example, as an integrated circuit, like the "Five Lamp / LED Flash Driver" HT 2051 the Holtek, is trained.
- the basic circuit points several outputs to which different LEDs be connected.
- the Basic circuit at the outputs cyclically pulses, so that the LEDs connected to different outputs illuminate cyclically.
- the repetition frequency with which the LEDs are activated depends on the value of a frequency-determining component that is externally connected the integrated circuit is connected. Here it is usually a resistance.
- the repetition frequency is low, and the value of the resistance is low, the repetition frequency of the pulses is high.
- All LEDs are used for the type of control Triggered pulses of the same duration. Have the LEDs different colors, so there are different Luminosity because the effectiveness, e.g. a blue light emitting diode, is less than that a red LED. The blue LEDs light up therefore less powerful than the red LEDs.
- DE-OS 40 00 954 is a programmer with selectable Duty cycle of lined up, the Program sequence defining impulses with electronic Counters and decoders disclosed.
- the width of the impulses can optionally by changing the resistance of the RC elements in the pulse generator are modified, whereby the pulse train generated in this way to a single output is issued. So within a program run created a large number of modifications that are of the different width of the Individual pulses and the number of individual pulses depends. A cyclical activation of several consumers, whereby assigned a certain amount of energy to each consumer is not described.
- the invention has for its object a circuit arrangement for cyclical activation of several consumers to create, which makes it possible with simple means that the individual consumers during a Control pulse supplied power individually dimensioned and thereby e.g. different efficiencies to balance the consumer.
- the circuit arrangement according to the invention is based on Principle on known circuits that the individual Control consumers with pulses of the same length.
- the frequency-determining component that determines the oscillator frequency, assigned a switch, with which the oscillator frequency changes temporarily can be, namely when the switch in the conductive state.
- This switch is used by the Outputs of the basic circuit controlled. So it is possible, for example an output of the basic circuit not to connect to the switch, so the Pulse generated at this output, the oscillator frequency not changed. Another exit of the Basic circuit can, however, be connected to the switch his. If there is a pulse of ground potential at this output occurs only for the duration of this pulse the oscillator frequency increases, causing the pulse sort of shortened itself.
- LEDs different colors for example the blue LEDs with a pulse duration operated that the normal (unchanged) Oscillator frequency corresponds to those Pulses that control the red LEDs at the same time increase the oscillator frequency and thus the pulse durations shorten the red LEDs. In this way it is achieved that the red LEDs are less electrical Power is supplied as the blue LEDs.
- the blue LEDs are a lot lower electro-optical and visual efficiency have than the red LEDs, both types appear of LEDs about the same brightness.
- the switch with which the oscillator frequency is changed, the frequency determining Component connected in parallel with a resistor.
- a preferred embodiment of the invention provides that the switch is switched as a current source is.
- Such a switch consists of a transistor in basic basic circuit. This transistor is used by the Output pulses of the basic circuit controlled and he generates an amperage that is unique to that particular Output that is currently activated depends. In this way, the duration of each pulse, with which the consumers are controlled, individually influenced, the oscillator its normal Fundamental frequency always assumes when the corresponding one Output pulse is ended.
- the usual circuit arrangements for driving LEDs generate pulses with a duty cycle of 1: 1, the pulse length being as long as that Impulse pause.
- This duty cycle is achieved by the invention individually changed.
- the invention is also the frequency determining Component a diode connected in parallel. This diode causes an additional change in the duty cycle, by shortening the pulse pauses.
- the circuit arrangement has a basic circuit 10 on, preferably as an integrated circuit is trained, e.g. the "Five Lamp / LED Flash Driver "HT 2051 from Holtek.
- This Basic circuit includes one Oscillator 11 with an inverting cut trigger 12, whose output via a resistor 13 on the Input is fed back, the amplifier input is also connected to a capacitor 14.
- the feedback branch of the cut trigger 12 is in series with the resistor 13 a frequency-determining component 15 provided in the form of a resistor that is external to the basic circuit 10 is connected to the consumer the fundamental frequency of the oscillator 11 by Choice of an appropriate resistance can set.
- the basic circuit 10 also has a plurality of outputs A1-A5 on. Each of these outputs is through a transistor T1-T5 controlled, a negative at this output Impulse (ground potential) sets when it is in the conductive State is controlled.
- the transistors T1-T5 are controlled by the oscillator circuit 11 one after the other, the transistor T1 providing a pulse, then an impulse pause of the same duration occurs, and the Transistor T2 provides a pulse, etc.
- the circuit arrangement described so far is known. It delivers pulses at the outputs A1-A5 equal durations, with the pulses at the outputs A1-A5 follow each other cyclically and then output A1 is activated again at output A5.
- the frequency-determining component 15 which is a resistor here, a switch 18 connected in parallel.
- the switch 18 is a transistor its emitter with one end and its collector with the other end of the frequency-determining component 15 is connected.
- the base is with resistors R1-R4 connected, of which the resistor R1 to the output A1, resistor R2 connected to output A2 etc. is.
- There is no corresponding one for output A5 Resistance is provided, i.e. Output A5 can do not control switch 18.
- the base of the switch 18 is also via a diode 22, which is the same as the emitter-base diode of the Switch 18 is switched, and a resistor R20 connected to the positive pole of the supply source 17.
- Resistor R1-R4 together with the resistor R20 a voltage divider through which a certain potential placed at the base of the switch 18 and this Switch is controlled in the conductive state.
- the Switch 18 forms together with the resistors mentioned R1-R4 and R20 a current source 19 which one Constant current supplies, the size of which is equal to the value of relevant resistor R1-R4 depends.
- the diode 22 serves the voltage drop of the emitter base diode of the switch 18 to compensate for that normally is not conductive.
- the resistors R1-R4 can be selected appropriately Pulse durations with which consumers L1-L4 are controlled be influenced individually.
- the switch 18 has a diode 21 connected in anti-parallel, i.e. connected in parallel with a polarity that that of the emitter-base diode of the switch 18 is opposite. This diode 21 shortens the pulse pauses between the pulses to almost zero, so that the pulses generated at the outputs A1-A5 be able to follow one another in immediate succession.
Description
Die Erfindung betrifft eine Schaltungsanordnung zum zyklischen Ansteuern mehrerer Verbraucher, mit einer Grundschaltung, die einen Oszillator enthält und an mehreren Ausgängen aufeinanderfolgend Impulse erzeugt, wobei der Oszillator ein frequenzbestimmendes Bauteil aufweist.The invention relates to a circuit arrangement for cyclical activation of several consumers, with one Basic circuit that contains an oscillator and on several outputs successively generated pulses, the oscillator being a frequency-determining component having.
Bekannt sind Schaltungsanordnungen, mit denen Verbraucher in Form von Leuchtdioden zyklisch angesteuert werden. Solche Schaltungsanordnungen werden beispielsweise in Displays oder in Schmuckstücken benutzt. Hierbei werden die Leuchtdioden von einer Grundschaltung gesteuert, die beispielsweise als integrierter Schaltkreis, wie der "Five Lamp/LED Flash Driver" HT 2051 der Fa. Holtek, ausgebildet ist. Die Grundschaltung weist mehrere Ausgänge auf, an die unterschiedliche Leuchtdioden angeschlossen werden. Beim Betrieb erzeugt die Grundschaltung an den Ausgängen zyklisch Impulse, so daß die an unterschiedliche Ausgänge angeschlossenen Leuchtdioden zyklisch aufleuchten. Die Folgefrequenz, mit der die Leuchtdioden aktiviert werden, hängt von dem Wert eines frequenzbestimmenden Bauteils ab, das extern an den integrierten Schaltkreis angeschlossen wird. Hierbei handelt es sich in der Regel um einen Widerstand. Ist der Wert des Widerstandes hoch, ist die Folgefrequenz niedrig, und ist der Wert des Widerstandes gering, ist die Folgefrequenz der Impulse hoch. Bei dieser Art der Ansteuerung werden alle Leuchtdioden mit Impulsen gleicher Dauer angesteuert. Haben die Leuchtdioden unterschiedliche Farben, so ergeben sich unterschiedliche Leuchtstärken, weil die Effektivität, z.B. einer blauen Leuchtdiode, geringer ist als diejenige einer roten Leuchtdiode. Die blauen Leuchtdioden leuchten daher weniger stark als die roten Leuchtdioden.Circuit arrangements with which consumers are known cyclically controlled in the form of light emitting diodes. Such circuit arrangements are, for example used in displays or in jewelry. Here the LEDs are controlled by a basic circuit, which, for example, as an integrated circuit, like the "Five Lamp / LED Flash Driver" HT 2051 the Holtek, is trained. The basic circuit points several outputs to which different LEDs be connected. In operation, the Basic circuit at the outputs cyclically pulses, so that the LEDs connected to different outputs illuminate cyclically. The repetition frequency with which the LEDs are activated depends on the value of a frequency-determining component that is externally connected the integrated circuit is connected. Here it is usually a resistance. If the value of the resistance is high, the repetition frequency is low, and the value of the resistance is low, the repetition frequency of the pulses is high. At this All LEDs are used for the type of control Triggered pulses of the same duration. Have the LEDs different colors, so there are different Luminosity because the effectiveness, e.g. a blue light emitting diode, is less than that a red LED. The blue LEDs light up therefore less powerful than the red LEDs.
In der DE-OS 40 00 954 ist ein Programmgeber mit wählbaren Tastverhältnissen von aneinandergereihten, den Programmablauf definierenden Impulsen mit elektronischen Zählern und Decodern offenbart. Die Breite der Impulse kann wahlweise durch Veränderung des Widerstandes des RC-Gliedes im Impulsgenerator modifiziert werden, wobei die derart erzeugte Impulsfolge an einen einzigen Ausgang ausgegeben wird. So können innerhalb eines Programmablaufs eine große Anzahl von Modifikationen erzeugt werden, die von der unterschiedlichen Breite der Einzelimpulse und der Anzahl der Einzelimpulse abhängt. Ein zyklisches Ansteuern mehrerer Verbraucher, wobei jedem Verbraucher eine bestimmte Energiemenge zugeteilt wird, ist nicht beschrieben.In DE-OS 40 00 954 is a programmer with selectable Duty cycle of lined up, the Program sequence defining impulses with electronic Counters and decoders disclosed. The width of the impulses can optionally by changing the resistance of the RC elements in the pulse generator are modified, whereby the pulse train generated in this way to a single output is issued. So within a program run created a large number of modifications that are of the different width of the Individual pulses and the number of individual pulses depends. A cyclical activation of several consumers, whereby assigned a certain amount of energy to each consumer is not described.
Der Erfindung liegt die Aufgabe zugrunde, eine Schaltungsanordnung zum zyklischen Ansteuern mehrerer Verbraucher zu schaffen, die es mit einfachen Mitteln ermöglicht, die den einzelnen Verbrauchern während eines Ansteuerimpulses zugeführte Leistung individuell zu bemessen und dadurch z.B. unterschiedliche Wirkungsgrade der Verbraucher auszugleichen.The invention has for its object a circuit arrangement for cyclical activation of several consumers to create, which makes it possible with simple means that the individual consumers during a Control pulse supplied power individually dimensioned and thereby e.g. different efficiencies to balance the consumer.
Die Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den Merkmalen des Patentanspruchs 1.This object is achieved with the invention the features of claim 1.
Die erfindungsgemäße Schaltungsanordnung basiert im Grundsatz auf bekannten Schaltungen, die die einzelnen Verbraucher mit Impulsen gleicher Länge ansteuern. Erfindungsgemäß ist dem frequenzbestimmenden Bauteil, das die Oszillatorfrequenz bestimmt, ein Schalter zugeordnet, mit dem die Oszillatorfrequenz vorübergehend verändert werden kann, nämlich dann, wenn der Schalter im leitenden Zustand ist. Dieser Schalter wird von den Ausgängen der Grundschaltung gesteuert. Es ist somit möglich, beispielsweise einen Ausgang der Grundschaltung nicht mit dem Schalter zu verbinden, so daß der Impuls, der an diesem Ausgang erzeugt wird, die Oszillatorfrequenz nicht verändert. Ein anderer Ausgang der Grundschaltung kann jedoch mit dem Schalter verbunden sein. Wenn an diesem Ausgang dann ein Impuls von Massepotential auftritt, wird nur für die Dauer dieses Impulses die Oszillatorfrequenz erhöht, wodurch der Impuls gewissermaßen sich selbst verkürzt.The circuit arrangement according to the invention is based on Principle on known circuits that the individual Control consumers with pulses of the same length. According to the invention is the frequency-determining component that determines the oscillator frequency, assigned a switch, with which the oscillator frequency changes temporarily can be, namely when the switch in the conductive state. This switch is used by the Outputs of the basic circuit controlled. So it is possible, for example an output of the basic circuit not to connect to the switch, so the Pulse generated at this output, the oscillator frequency not changed. Another exit of the Basic circuit can, however, be connected to the switch his. If there is a pulse of ground potential at this output occurs only for the duration of this pulse the oscillator frequency increases, causing the pulse sort of shortened itself.
Wird die Schaltungsanordnung dazu benutzt, Leuchtdioden unterschiedlicher Farben zu steuern, so können beispielsweise die blauen Leuchtdioden mit einer Impulsdauer betrieben werden, die der normalen (unveränderten) Oszillatorfrequenz entspricht, während diejenigen Impulse, die die roten Leuchtdioden steuern, zugleich die Oszillatorfrequenz erhöhen und somit die Impulsdauern der roten Leuchtdioden verkürzen. Auf diese Weise wird erreicht, daß den roten Leuchtdioden weniger elektrische Leistung zugeführt wird als den blauen Leuchtdioden. Da jedoch die blauen Leuchtdioden einen viel geringeren elektrooptischen und visuellen Wirkungsgrad haben als die roten Leuchtdioden, erscheinen beide Arten von Leuchtdioden etwa gleich hell.If the circuit arrangement is used, LEDs different colors, for example the blue LEDs with a pulse duration operated that the normal (unchanged) Oscillator frequency corresponds to those Pulses that control the red LEDs at the same time increase the oscillator frequency and thus the pulse durations shorten the red LEDs. In this way it is achieved that the red LEDs are less electrical Power is supplied as the blue LEDs. However, since the blue LEDs are a lot lower electro-optical and visual efficiency have than the red LEDs, both types appear of LEDs about the same brightness.
Mit der Erfindung können aber auch gleichartige Leuchtdioden, z.B. ausschließlich rote Leuchtdioden, in der Weise gesteuert werden, daß diese Leuchtdioden individuell unterschiedliche Leuchtdauern haben.With the invention, however, similar light-emitting diodes, e.g. only red LEDs, in the Be controlled in such a way that these LEDs are individual have different lighting times.
Im einfachsten Fall ist der Schalter, mit dem die Oszillatorfrequenz verändert wird, dem frequenzbestimmenden Bauteil zusammen mit einem Widerstand parallelgeschaltet. Eine bevorzugte Ausführungsform der Erfindung sieht vor, daß der Schalter als Stromquelle geschaltet ist. Ein solcher Schalter besteht aus einem Transistor in Basis-Grundschaltung. Dieser Transistor wird von den Ausgangsimpulsen der Grundschaltung gesteuert und er erzeugt eine Stromstärke, die individuell von dem betreffenden Ausgang, der gerade aktiviert ist, abhängt. Auf diese Weise werden die Dauern der einzelnen Impulse, mit denen die Verbraucher angesteuert werden, individuell beeinflußt, wobei der Oszillator seine normale Grundfrequenz immer dann wieder annimmt, wenn der entsprechende Ausgangsimpuls beendet ist.In the simplest case is the switch with which the oscillator frequency is changed, the frequency determining Component connected in parallel with a resistor. A preferred embodiment of the invention provides that the switch is switched as a current source is. Such a switch consists of a transistor in basic basic circuit. This transistor is used by the Output pulses of the basic circuit controlled and he generates an amperage that is unique to that particular Output that is currently activated depends. In this way, the duration of each pulse, with which the consumers are controlled, individually influenced, the oscillator its normal Fundamental frequency always assumes when the corresponding one Output pulse is ended.
Die üblichen Schaltungsanordnungen zum Ansteuern von Leuchtdioden erzeugen Impulse mit einem Tastverhältnis von 1:1, wobei die Impulslänge ebenso groß ist wie die Impulspause. Durch die Erfindung wird dieses Tastverhältnis individuell verändert. In vorteilhafter Weiterbildung der Erfindung ist ferner dem frequenzbestimmenden Bauteil eine Diode parallelgeschaltet. Diese Diode bewirkt eine zusätzliche Veränderung des Tastverhältnisses, indem sie die Impulspausen verkürzt.The usual circuit arrangements for driving LEDs generate pulses with a duty cycle of 1: 1, the pulse length being as long as that Impulse pause. This duty cycle is achieved by the invention individually changed. In an advantageous further training the invention is also the frequency determining Component a diode connected in parallel. This diode causes an additional change in the duty cycle, by shortening the pulse pauses.
Im folgenden wird unter Bezugnahme auf die einzige Figur der Zeichnung ein Ausführungsbeispiel der Erfindung näher erläutert.The following is with reference to the single figure the drawing an embodiment of the invention explained in more detail.
In der Zeichnung ist ein schematisches Schaltbild der erfindungsgemäßen Schaltungsanordnung dargestellt.In the drawing is a schematic diagram of the Circuit arrangement according to the invention shown.
Die Schaltungsanordnung weist eine Grundschaltung
10 auf, die vorzugsweise als integrierter Schaltkreis
ausgebildet ist, wie z.B. der "Five Lamp/LED
Flash Driver" HT 2051 der Fa. Holtek. Diese
Grundschaltung enthält u.a. einen
Oszillator 11 mit einem invertierenden Schnitt-Trigger
12, dessen Ausgang über einen Widerstand 13 auf den
Eingang rückgekoppelt ist, wobei der Verstärkereingang
ferner mit einem Kondensator 14 verbunden ist. In dem
Rückkopplungszweig des Schnitt-Triggers 12 ist in Reihe
mit dem Widerstand 13 ein frequenzbestimmendes Bauteil
15 in Form eines Widerstandes vorgesehen, das extern an
die Grundschaltung 10 angeschlossen ist, damit der Verbraucher
die Grundfrequenz des Oszillators 11 durch
Wahl eines entsprechenden Widerstandes einstellen kann.The circuit arrangement has a
Die Grundschaltung 10 weist ferner mehrere Ausgänge A1-A5
auf. Jeder dieser Ausgänge ist über einen Transistor
T1-T5 gesteuert, der an diesen Ausgang einen negativen
Impuls (Massepotential) legt, wenn er in den leitenden
Zustand gesteuert ist. Die Transistoren T1-T5 werden
von der Oszillatorschaltung 11 nacheinander angesteuert,
wobei der Transistor T1 einen Impuls liefert, danach
eine Impulspause gleicher Dauer eintritt, und der
Transistor T2 einen Impuls liefert, usw.The
An jeden der Ausgänge A1-A5 ist ein Verbraucher L1-L5
in Form einer Leuchtdiode angeschlossen. Alle Leuchtdioden
sind an ihren anderen Anschlüssen untereinander
verbunden und über einen Widerstand 16 mit dem positiven
Pol einer Spannungsquelle 17 verbunden, deren negativer
Pol an Massepotential angeschlossen ist. Wenn an
einem der Ausgänge A1-A5 ein Ausgangsimpuls (Massepotential)
auftritt, leuchtet die betreffende Leuchtdiode
auf.There is a consumer L1-L5 at each of the outputs A1-A5
connected in the form of a light emitting diode. All LEDs
are at their other connections with each other
connected and via a
Die bisher beschriebene Schaltungsanordnung ist bekannt. Sie liefert an den Ausgängen A1-A5 jeweils Impulse gleicher Dauern, wobei die Impulse an den Ausgängen A1-A5 zyklisch aufeinander folgen und im Anschluß an den Ausgang A5 wieder der Ausgang A1 aktiviert wird.The circuit arrangement described so far is known. It delivers pulses at the outputs A1-A5 equal durations, with the pulses at the outputs A1-A5 follow each other cyclically and then output A1 is activated again at output A5.
Nach der Erfindung ist dem frequenzbestimmenden Bauteil
15, das hier ein Widerstand ist, ein Schalter 18 parallelgeschaltet.
Der Schalter 18 ist ein Transistor,
dessen Emitter mit dem einen Ende und dessen Kollektor
mit dem anderen Ende des frequenzbestimmenden Bauteils
15 verbunden ist. Die Basis ist mit Widerständen R1-R4
verbunden, von denen der Widerstand R1 an den Ausgang
A1, der Widerstand R2 an den Ausgang A2 usw. angeschlossen
ist. Für den Ausgang A5 ist hier kein entsprechender
Widerstand vorgesehen, d.h. Ausgang A5 kann
den Schalter 18 nicht steuern.According to the invention is the frequency-determining
Die Basis des Schalters 18 ist ferner über eine Diode
22, die gleichsinnig mit der Emitter-Basis-Diode des
Schalters 18 geschaltet ist, und einen Widerstand R20
mit dem Pluspol der Versorgungsquelle 17 verbunden.The base of the
Wenn an einem der Ausgänge A1-A4 ein Ausgangssignal
(Impuls von Massepotential) auftritt, bildet der betreffende
Widerstand R1-R4 zusammen mit dem Widerstand
R20 einen Spannungsteiler, durch den ein bestimmtes Potential
an die Basis des Schalters 18 gelegt und dieser
Schalter in den leitenden Zustand gesteuert wird. Der
Schalter 18 bildet zusammen mit den genannten Widerständen
R1-R4 und R20 eine Stromquelle 19, die einen
Konstantstrom liefert, dessen Größe von dem Wert des
betreffenden Widerstandes R1-R4 abhängt. Die Diode 22
dient dazu, den Spannungsabfall der Emitter-Basis-Diode
des Schalters 18 zu kompensieren, der normalerweise
nichtleitend ist.If there is an output signal at one of the outputs A1-A4
(Pulse of ground potential) occurs, forms the one in question
Resistor R1-R4 together with the resistor
R20 a voltage divider through which a certain potential
placed at the base of the
Wenn an dem Ausgang A5 ein Impuls (Massepotential) auftritt,
wird hierdurch die Grundfrequenz des Oszillators
nicht verändert, weil der Ausgang A5 hier nicht mit dem
Schalter 18 verbunden ist. Folglich schwingt der Oszillator
11 mit derjenigen Grundfrequenz, die durch das
frequenzbestimmende Bauteil 15 vorgegeben ist. Wenn der
Impuls am Ausgang A5 beendet ist, wird nach einer Impulspause
am Ausgang A1 der nächste Impuls erzeugt.
Wenn der Ausgang A1 Massepotential annimmt, wird die
Basis des Schalters 18 negativ, wodurch der Schalter 18
als Stromquellentransistor wirkt und einen konstanten
Strom leitet, der vom Wert von R1 abhängt. Infolge der
Impedanz, die dem frequenzbestimmenden Bauteil 15 nun
parallelgeschaltet ist, wird die Frequenz des Oszillators
11 erhöht. Der Oszillator 11 schwingt also früher
zurück und beendet den Impuls am Ausgang A1 vorzeitig.
Wenn der Impuls am Ausgang A1 beendet ist, wird der
Schalter 18 wieder in den nichtleitenden Zustand gesteuert
und der Oszillator 11 schwingt wieder mit der
Grundfrequenz.If a pulse (ground potential) occurs at output A5,
this becomes the fundamental frequency of the oscillator
not changed, because the output A5 does not match the
Switch 18 is connected. As a result, the oscillator vibrates
11 with the fundamental frequency, which by the
frequency-determining
Durch geeignete Wahl der Widerstände R1-R4 können die Impulsdauern, mit denen die Verbraucher L1-L4 angesteuert werden, individuell beeinflußt werden.The resistors R1-R4 can be selected appropriately Pulse durations with which consumers L1-L4 are controlled be influenced individually.
Dem Schalter 18 ist eine Diode 21 antiparallelgeschaltet,
d.h. mit einer Polarität parallelgeschaltet, die
derjenigen der Emitter-Basis-Diode des Schalters 18
entgegengesetzt ist. Diese Diode 21 verkürzt die Impulspausen
zwischen den Impulsen bis auf nahezu Null,
so daß die Impulse, die an den Ausgängen A1-A5 erzeugt
werden, in unmittelbarer Folge aufeinanderfolgen können.The
Claims (7)
- Circuitry adapted for cyclic control of a plurality of consumers (L1 - L5), comprising a basic circuit (10) provided with an oscillator (11) and generating successive pulses at a plurality of outputs (A1 - A5), the oscillator (11) comprising a feedback branch having a frequencydetermining component (15),
characterized in that
at least one of the outputs (A1 - A5) controls a switch (18) connected with the frequency-determining component (15), the switch (18) changing the oscillator frequency when a pulse occurs at said output (A1 - A5), wherein the oscillator frequency is independently variable for each consumer. - Circuitry according to claim 1, characterized in that the switch (18) is connected as current source (19) which supplies constant current in switched-on condition.
- Circuitry according to claim 2, characterized in that the current source (19) is connected in parallel to the frequency-determining component (15) between its input and output.
- Circuitry according to claim 2 or 3, characterized in that the current source (19) comprises a resistor (R1 - R4) which connects the output (A1 - A4) of the basic circuit (10) with the switch (18) and whose value determines the change in the oscillator frequency.
- Circuitry according to claim 4, characterized in that the resistor (R1 - R4) is connceted with the basis of a current source transistor which is connected in parallel to the frequency-determining component (15) between its input and output.
- Circuitry according to one of claims 2 - 5, characterized in that the current source (19) comprises a resistor (20) connected with a pole of the supply voltage device.
- Circuitry according to one of claims 1 - 6, characterized in that a diode (21) is connected in parallel to the frequency-determining component (15) to shorten the pulse intervals.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29518640U | 1995-11-24 | ||
| DE29518640U DE29518640U1 (en) | 1995-11-24 | 1995-11-24 | Circuit arrangement for the cyclical activation of several consumers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0776090A1 EP0776090A1 (en) | 1997-05-28 |
| EP0776090B1 true EP0776090B1 (en) | 2000-03-15 |
Family
ID=8015859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96117383A Expired - Lifetime EP0776090B1 (en) | 1995-11-24 | 1996-10-30 | Circuit for cyclically driving several electric consumers |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5892296A (en) |
| EP (1) | EP0776090B1 (en) |
| JP (1) | JPH09281923A (en) |
| AU (1) | AU7184596A (en) |
| DE (2) | DE29518640U1 (en) |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3601620A (en) * | 1969-07-18 | 1971-08-24 | Electro Proudcts Lab Inc | Power supply |
| US3793531A (en) * | 1971-12-09 | 1974-02-19 | Gen Electric | Electronic tree light controller |
| DE2555584A1 (en) * | 1975-12-10 | 1977-06-16 | Siemens Ag | Display table using light emitting diodes - has diodes in series,each with respective switch, relay or button |
| US4215277A (en) * | 1979-02-09 | 1980-07-29 | Robert I. Weiner | Sequencing light controller |
| FR2477705A1 (en) * | 1980-03-05 | 1981-09-11 | David Michel | colorimeter for measurement of shades - uses different colour light beams and employs memories to store digitised output of photocell for sample and reference |
| US4514727A (en) * | 1982-06-28 | 1985-04-30 | Trw Inc. | Automatic brightness control apparatus |
| US4780621A (en) * | 1987-06-30 | 1988-10-25 | Frank J. Bartleucci | Ornamental lighting system |
| JPS6473815A (en) * | 1987-09-14 | 1989-03-20 | Nec Corp | Clock signal generation circuit |
| DE4000954A1 (en) * | 1989-08-25 | 1991-07-18 | Conrad Siegfried | Pulse program generator or frequency divider - has decoders controlling switches that switch resistors into rc cct. of pulse generator |
| JP3268001B2 (en) * | 1992-03-25 | 2002-03-25 | シャープ株式会社 | LED dot matrix type display device |
| US5300864A (en) * | 1992-10-06 | 1994-04-05 | Almic Industries | Programmable lighting control system |
| JP3535189B2 (en) * | 1993-04-20 | 2004-06-07 | ローム株式会社 | LED print head |
| DE4400191C2 (en) * | 1994-01-05 | 1996-01-11 | Dirk Glenn | Spreading disc |
| JPH07212197A (en) * | 1994-01-20 | 1995-08-11 | Casio Comput Co Ltd | Clock generator and liquid crystal driving device using the clock generator |
| DE9414689U1 (en) * | 1994-09-10 | 1994-12-15 | Schluemer Heinz Dieter | Multi-LED |
-
1995
- 1995-11-24 DE DE29518640U patent/DE29518640U1/en not_active Expired - Lifetime
-
1996
- 1996-10-30 EP EP96117383A patent/EP0776090B1/en not_active Expired - Lifetime
- 1996-10-30 DE DE59604667T patent/DE59604667D1/en not_active Expired - Lifetime
- 1996-11-12 US US08/747,678 patent/US5892296A/en not_active Expired - Fee Related
- 1996-11-12 JP JP8300607A patent/JPH09281923A/en active Pending
- 1996-11-19 AU AU71845/96A patent/AU7184596A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE29518640U1 (en) | 1997-03-27 |
| EP0776090A1 (en) | 1997-05-28 |
| US5892296A (en) | 1999-04-06 |
| JPH09281923A (en) | 1997-10-31 |
| DE59604667D1 (en) | 2000-04-20 |
| AU7184596A (en) | 1997-05-29 |
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