DE1962004A1 - Fail-safe multivibrators - Google Patents

Fail-safe multivibrators

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Publication number
DE1962004A1
DE1962004A1 DE19691962004 DE1962004A DE1962004A1 DE 1962004 A1 DE1962004 A1 DE 1962004A1 DE 19691962004 DE19691962004 DE 19691962004 DE 1962004 A DE1962004 A DE 1962004A DE 1962004 A1 DE1962004 A1 DE 1962004A1
Authority
DE
Germany
Prior art keywords
capacitor
gate
output
resistor
series
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE19691962004
Other languages
German (de)
Inventor
Siegfried Schwarz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19691962004 priority Critical patent/DE1962004A1/en
Publication of DE1962004A1 publication Critical patent/DE1962004A1/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/284—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator monostable

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manipulation Of Pulses (AREA)

Description

Störsichere Multivibratoren Die bekannten Multivibratorschaltungen haben den Nachteil, daß sie unmittelbar vor dem selbsttätigen Rückkippen sehr empfindlich gegen Störimpulse sind.Interference-free multivibrators The well-known multivibrator circuits have the disadvantage that they are very sensitive immediately before the automatic tilting back against glitches.

Bei der erfindungsgemäßen Schaltung, Fig. 1, wird dies vermieden, da nicht dio Summe der Spannungen des Kondensators C1 und die Ausgangs spannung des Gatters II gegen Masse den Rückkippvorgang auslösen, sondern nur die Spannung m Kondensator allein. Auftretende Stör impulse am Ausgang des Galters II werden durch die Siebwirkung des RC~Gliedes R1, C1 unterdrückt.In the circuit according to the invention, FIG. 1, this is avoided, because not the sum of the voltages of the capacitor C1 and the output voltage of gate II to ground trigger the tilting back process, but only the voltage m capacitor alone. Occurring interference pulses at the output of the Galters II suppressed by the screening effect of the RC element R1, C1.

Die Anschlüsse des Kondensators C1 sind-mit den beiden Eingängen eines Komparators verbunden. Überschreitet die Spannung am Kondensator C1 die Schwellspannung des Komparators, so triggert dessen Ausgang den Eingang 2 des Gatters II. Der monostabile Multivibrator kippt zurück.The connections of the capacitor C1 are -with the two inputs of one Comparator connected. If the voltage on capacitor C1 exceeds the threshold voltage of the comparator, its output triggers input 2 of gate II. The monostable Multivibrator tilts back.

Im einfachsten Fall besteht der Komparator aus einem Transistor T1, der das Rückkippen einleitet, sobald die Basis-Emitter-Strecke teltrend wird. Fig. 2.In the simplest case, the comparator consists of a transistor T1, which initiates the tilting back as soon as the base-emitter path becomes teltrend. Fig. 2.

Während des Rückkippvorgangs bewegen sich die Potentiale von Eingang und Ausgang des Gatters II aufeinander zu. Dies erschwert don Ruck kippvorgang durch den Transistor T1. Um das Rückkippen bei allen Be triebebedingungen zu gewährleisten, wird in dem Kondensator C3 Triggerenergie gespeichert, so daß der Rückkippvorgang auch weiter.During the tilting back process, the input potentials move and output of gate II towards one another. This makes it difficult for the jerk to tilt through the transistor T1. To ensure tilting back under all operating conditions, is stored in the capacitor C3 trigger energy, so that the tilting back process also further.

wirkt, wenn der Kollektorstrom im Transistor T1 Wull wird.acts when the collector current in transistor T1 becomes Wull.

Die Fig. 3 zeigt eine astabile, Rtöreichere Multivibratorschaltung.Fig. 3 shows an astable, Rtörichere multivibrator circuit.

In ihr werden zwei Triggernetzwerke verwendet. Der Triggerimpull Bin Eingang 2 des Gatters I wird durch ein zweites Triggernetzwerk R2, C2, T2, C4 gebildet.Two trigger networks are used in it. The trigger pulse bin Input 2 of gate I is formed by a second trigger network R2, C2, T2, C4.

Claims (4)

PatentansprücheClaims 1) Störsichere, monostabile Multivibratorschaltung dadurch gekennzeichnet1 daß zwei NAND-Gatter mit Je 2 Eingängen in Reihe zu einem Ring geschaltet sind und der Ausgang des Gatters II über eiieJ Kondensator C1 und einen Widerstand R1 in Reihe mit dem Ausgang des Gatters I verbunden ist, und an den Anschlüssen des Kondensators die Eingänge des Komparators angeschlossen sind, dessen Ausgang. mit dem Eingang 2 des Gatters II verbunden ist und die Rücktriggerung einleitet, sobald die Spannung am Kon densator C1 die Schwellspannung des Komparators überschreitet. 1) Fail-safe, monostable multivibrator circuit characterized in 1 that two NAND gates with 2 inputs each are connected in series to form a ring and the output of the gate II through a capacitor C1 and a resistor R1 in Series connected to the output of the gate I, and to the terminals of the capacitor the inputs of the comparator are connected, its output. with the entrance 2 of the gate II is connected and the back triggering is initiated as soon as the voltage at the capacitor C1 exceeds the threshold voltage of the comparator. 2,) ßtörsichere, monostabile Multivibratorschaltung dadurch gekennzeichnet, daß zwei NAND-Gatter mit je 2 Eingängen in Reihe zu einem Ring geschaltet sind und der Ausgang des Gatters II über .einen Kondensator C1 und einen Widerstand R1 in Reihe mit dem Ausgang des Gatters I verbunden ist und die Basis-Emitter-Strecke des Transistors T1 so mit dem Kondensator C1 parallel geschaltet ist, daß die Basis mit dem Verbindungspunkt von Kondensator und Widerstand R1 verbunden ist, so daß die Riicktriggerung iiber den Kollektor, welcher am Eingang 2 des Gatters II angeschlossen ist, erfolgt, sobald die Basis-Emitter-Strecke leitend wird. 2,) interference-free, monostable multivibrator circuit characterized by that two NAND gates with 2 inputs each are connected in series to form a ring and the output of the gate II via .ein capacitor C1 and a resistor R1 in Series is connected to the output of the gate I and the base-emitter path of the transistor T1 is connected in parallel with the capacitor C1 that the base is connected to the junction of capacitor and resistor R1, so that the back-triggering via the collector, which is connected to input 2 of gate II takes place as soon as the base-emitter path becomes conductive. 3.) Multivibratorschaltung nach Anspruch 2 dadurch gekennzeichnet, daB der Kollektor dns Transistors T1 über einen Kondensator C3 mit der Betriebsspannung UE verbunden ist, so daß in diesem Triggerenergie gespeichert wird. 3.) Multivibrator circuit according to claim 2, characterized in that that the collector of the transistor T1 via a capacitor C3 with the operating voltage UE is connected, so that trigger energy is stored in this. 4.) Störsichere, astabile Multivibratorschaltung nach Anspruch 1 - 3 dadurch gekennzeichnet, daß an den Ausgängen der Gatter 1 und II ein zweites Triggernetzwerk angeschlossen ist, wobei die Anschlüsse des Widerstandes R2 und der des Kondensators C2 an den Gattern vertauscht werden und der Kollektor des Transistors T2 den Eingang 2 des Gatters I triggert. 4.) Interference-proof, astable multivibrator circuit according to claim 1 - 3 characterized in that a second at the outputs of gates 1 and II Trigger network is connected, the connections of the resistor R2 and that of the capacitor C2 on the gates are swapped and the collector of the transistor T2 triggers input 2 of gate I.
DE19691962004 1969-12-11 1969-12-11 Fail-safe multivibrators Pending DE1962004A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19691962004 DE1962004A1 (en) 1969-12-11 1969-12-11 Fail-safe multivibrators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691962004 DE1962004A1 (en) 1969-12-11 1969-12-11 Fail-safe multivibrators

Publications (1)

Publication Number Publication Date
DE1962004A1 true DE1962004A1 (en) 1971-06-16

Family

ID=5753488

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19691962004 Pending DE1962004A1 (en) 1969-12-11 1969-12-11 Fail-safe multivibrators

Country Status (1)

Country Link
DE (1) DE1962004A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995028033A2 (en) * 1994-04-12 1995-10-19 Philips Electronics N.V. Receiver comprising a pulse count fm demodulator, and pulse count fm demodulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995028033A2 (en) * 1994-04-12 1995-10-19 Philips Electronics N.V. Receiver comprising a pulse count fm demodulator, and pulse count fm demodulator
WO1995028033A3 (en) * 1994-04-12 1995-12-07 Philips Electronics Nv Receiver comprising a pulse count fm demodulator, and pulse count fm demodulator

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