DE1962004A1 - Fail-safe multivibrators - Google Patents
Fail-safe multivibratorsInfo
- 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
Links
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
Landscapes
- 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)
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)
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 |
-
1969
- 1969-12-11 DE DE19691962004 patent/DE1962004A1/en active Pending
Cited By (2)
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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