DE1073540B - Pulse converter for shortening pulses - Google Patents
Pulse converter for shortening pulsesInfo
- Publication number
- DE1073540B DE1073540B DENDAT1073540D DE1073540DA DE1073540B DE 1073540 B DE1073540 B DE 1073540B DE NDAT1073540 D DENDAT1073540 D DE NDAT1073540D DE 1073540D A DE1073540D A DE 1073540DA DE 1073540 B DE1073540 B DE 1073540B
- Authority
- DE
- Germany
- Prior art keywords
- resistor
- capacitor
- transistor
- pulse
- voltage
- 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
- 238000004904 shortening Methods 0.000 title claims 2
- 239000003990 capacitor Substances 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 230000002123 temporal effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001061 forehead Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/04—Shaping pulses by increasing duration; by decreasing duration
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Dc-Dc Converters (AREA)
Description
Die Erfindung betrifft einen Impulsumformer für elektronische Schalteinrichtungen, wie Rechensysteme, Vermittlungssysteme u. dgl., zur Umbildung von Impulsen in eine für die Verarbeitung durch elektronische Schalteinrichtungen geeignete Impulsform. Die schnell 5 arbeitenden elektronischen Schaltmittel, wie Transistoren, Dioden u. dgl., verarbeiten Impulse von der Dauer von einigen Mikroeekunden. Die durcih die mechanische Bewegung von Kontakten erzeugten Impulse sind dagegen wesentlich größer und bedürfen somit einer Umformung. Eine Umwandlung der Impulsform in Impulse geringerer Länge ermöglicht die Erfindung dadurch, daß in dem an sich bekannten Entladekreis eines Kondensatoirs ein Widerstand enthalten ist, an dessen Enden der Ausgangsimpuls abgegriffen werden kann und die Emitter-Kollektor-Strecke eines Transistors liegt, dessen Basis von dem Eingangsimpuls beeinflußt werden kann. Die Erfindung ermöglicht es, in Abhängigkeit von der Stirn des steuernden Impulses einen Impuls gewünschter Kürze zu erzeugen, dessen zeitlicher Verlauf durch die Bemessung der Schaltglieder des Entladekreises des Kondensators und der Höhe seiner negativen Aufladung bedingt ist.The invention relates to a pulse converter for electronic switching devices, such as computing systems, Switching systems and the like, for converting pulses into one for processing by electronic means Pulse shape suitable for switching devices. The fast 5 working electronic switching means, such as transistors, diodes and the like, process pulses from the Duration of a few micro-customers. The impulses generated by the mechanical movement of contacts on the other hand are much larger and therefore require reshaping. A conversion of the pulse shape In pulses of shorter length, the invention enables that in the known discharge circuit A capacitor contains a resistor, at the ends of which the output pulse is tapped and the emitter-collector path of a transistor whose base can be influenced by the input pulse. The invention enables it, depending on the forehead of the controlling impulse, to generate an impulse of the desired shortness, its temporal course by the dimensioning of the switching elements of the discharge circuit of the capacitor and the amount of its negative charge is conditional.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Es zeigtAn embodiment of the invention is shown in the drawing. It shows
Fig. 1 die Schaltungsanordnung eines ImpulsumfoTmers nach der Erfindung;1 shows the circuit arrangement of a pulse converter according to the invention;
Fig. 2 und 3 zwei Diagramme des Verlaufs des Kollektorstromes ik in Abhängigkeit von der Spannung an dem Transistor und in Abhängigkeit von der Zeit.2 and 3 show two diagrams of the course of the collector current i k as a function of the voltage across the transistor and as a function of time.
Bei der in Fig. 1 dargestellten Anordnung liegt der Kondensator über einen Widerstand R1 an der Spannung — Uß, die beispielsweise 12 V betragen kann, und über einen Widerstand R an der positiven Spannung, welche üblicherweise geerdet ist. Der Kondensator C wird daher im Ruhezustand auf die Spannung — Ug aufgeladen. In dem Entladekreis des Kondensators C liegt die Emitter-Kollektor-Strecke des Transistors Tr. Im Ruhezustand ist der Transistor Tr gesperrt, da die Basis auf den Kontakt j an positiver Spannung liegt. Wird der Transistor durah Umlegen des Kontaktes s ausgesteuert, so> kann sich der Kondensator C über den Transistor und den Widerstand R entladen. Hierbei fließt der Entladestrom ic. In the arrangement shown in FIG. 1, the capacitor is connected to the voltage - Uβ, which can be, for example, 12 V, via a resistor R 1, and to the positive voltage, which is usually grounded, via a resistor R. The capacitor C is therefore charged to the voltage - Ug in the idle state. The emitter-collector path of the transistor Tr is located in the discharge circuit of the capacitor C. In the idle state, the transistor Tr is blocked, since the base on the contact j has a positive voltage. If the transistor is controlled by switching the contact s , then the capacitor C can discharge via the transistor and the resistor R. The discharge current ic flows here.
Durch Bemessung der Spannung, die an die Basis des Transistors Tr gelegt wird, kann man den Transistor Tr so aussteuern, daß der Entladestrom ic kleiner ist als der sich aus dem Verhältnis der Spannung — Uß zu dem Widerstand R ergebenden Strommiß. Der Transistor wirkt also in diesem Fall strombegrenzend. Der Kondensator wird daher mit nahezu konstantem Strom entladen (^1 bis t2), bis der Spannungsabfall UCE an Kollektor und Emitter des Transistors die Sättigungsspannung UK unterschreitet.By measuring the voltage that is applied to the base of the transistor Tr , the transistor Tr can be controlled in such a way that the discharge current ic is smaller than the current draw resulting from the ratio of the voltage - Uß to the resistance R. In this case, the transistor has a current-limiting effect. The capacitor is therefore discharged with an almost constant current (^ 1 to t 2 ) until the voltage drop U CE at the collector and emitter of the transistor falls below the saturation voltage U K.
Impulsumformer
zur Verkürzung von ImpulsenPulse converter
to shorten pulses
Anmelder:Applicant:
Friedrich Merk TelefonbauFriedrich Merk telephone construction
Aktiengesellschaft,
München 9, Warngauer Str. 32Corporation,
Munich 9, Warngauer Str. 32
Dipl.-Ing. Traian v. Onciul, München,
ist als Erfinder genannt wordenDipl.-Ing. Traian v. Onciul, Munich,
has been named as the inventor
Dann ist der Widerstand des Transistors sehr klein, und die weitere Entladung geht sehr rasch vor sich 3Ό (t2 bis i„, vgl. Fig. 2 und 3).Then the resistance of the transistor is very small, and the further discharge takes place very quickly 3Ό (t 2 to i ″, cf. FIGS. 2 and 3).
Wählt man den Widerstand R1 genügend groß, so kann der Stromfluß i 1 über diesen Widerstand vernachlässigt werden. Es wird dann i^« ic. Der gesamte Entladestrom ic fließt dann durah den Widerstand R, und die an dem Endwiderstand R auftretende Spannung UR hat denselben zeitlichen Verlauf wie der Entladestrom ic. If the resistance R 1 is chosen to be sufficiently large, the current flow i 1 via this resistance can be neglected. It then becomes i ^ «ic. The entire discharge current ic flows Durah the resistor R, and the occurring at the pull-up resistor R voltage U R has the same temporal profile as the discharge current ic.
Claims (3)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1073540B true DE1073540B (en) | 1960-01-21 |
Family
ID=597788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT1073540D Pending DE1073540B (en) | Pulse converter for shortening pulses |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1073540B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB690210A (en) * | 1944-10-02 | 1953-04-15 | Standard Telephones Cables Ltd | Electric pulse converting system |
| US2793303A (en) * | 1951-12-21 | 1957-05-21 | Ibm | Pulse sharpening circuits |
-
0
- DE DENDAT1073540D patent/DE1073540B/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB690210A (en) * | 1944-10-02 | 1953-04-15 | Standard Telephones Cables Ltd | Electric pulse converting system |
| US2793303A (en) * | 1951-12-21 | 1957-05-21 | Ibm | Pulse sharpening circuits |
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