AT105952B - Simulation of the impedance of Pupin lines. - Google Patents
Simulation of the impedance of Pupin lines.Info
- Publication number
- AT105952B AT105952B AT105952DA AT105952B AT 105952 B AT105952 B AT 105952B AT 105952D A AT105952D A AT 105952DA AT 105952 B AT105952 B AT 105952B
- Authority
- AT
- Austria
- Prior art keywords
- line
- replica
- lines
- impedance
- simulation
- Prior art date
Links
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
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Nachbildung des Scheinwiderstandes von Pnpinleitungen.
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Der Eingangswiderstand wird dadurch so umgebildet, dass seine Blindkomponente für das gesamte Sprachfrequenzgebiet erhebliche negative Werte annimmt, während der Realteil nur unbedeutend ver- ändert wird. Erfindungsgemäss kann die Unsymmetrie des Netzwerkes und der Längskondensator Co so gewählt werden, dass eine Nachbildung erreicht wird, ohne dass der Ringübertrager und die Rufstromsperrkondensatoren durch gleiche nachgebildet werden müssen. In Fig. 3 sind die Kurven für diesen Fall dargestellt. Die an die einzelnen Kurven angeschriebenen Ziffern haben dieselbe Bedeutung wie in Fig. 2.
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Bei zu kurzen Verstärkerfeldern ist es nützlich, dem Kabel eine künstliche Verlängerung vorzuschalten, die seine Dämpfung auf den Wert des Normalverstärkerîeldes, bringt, ohne den Eingangswiderstand erheblich zu ändern.
Sie wird zweckmässig zwischen Ringübertrager und Verstärker geschaltet und beeinflusst den Realteil nur in den höheren Frequenzen. Auch für diesen Fall können die gemäss der Erfindung ausgebildeten Nachbildungen verwendet werden, ohne dass es notwendig wäre, den Ring- übertrager, die Sperrkondensatoren und die Leitungsverlängerung durch gleichgebaute Elemente je für sieh nachzubilden.
PATENT-ANSPRÜCHE :
1. Nachbildung des Scheinwiderstandes von Pupinleitungen nach Patent Nr. 104309, dadurch gekennzeichnet, dass das nach Art eines Leitungsgliedes ausgebildete Netzwerk unsymmetrisch ist.
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Simulation of the impedance of pnpin lines.
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The input resistance is transformed in such a way that its reactive component assumes considerable negative values for the entire speech frequency range, while the real part is only changed insignificantly. According to the invention, the asymmetry of the network and the series capacitor Co can be selected so that a simulation is achieved without the ring transmitter and the ringing current blocking capacitors having to be simulated by the same. In Fig. 3 the curves are shown for this case. The numbers written on the individual curves have the same meaning as in FIG. 2.
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If the amplifier fields are too short, it is useful to connect an artificial extension upstream of the cable, which brings its attenuation to the value of the normal amplifier field without significantly changing the input resistance.
It is conveniently connected between the ring transformer and the amplifier and only influences the real part in the higher frequencies. In this case, too, the simulations designed according to the invention can be used without it being necessary to simulate the ring transformer, the blocking capacitors and the line extension by means of identical elements.
PATENT CLAIMS:
1. Imitation of the impedance of Pupin lines according to patent no. 104309, characterized in that the network formed in the manner of a line link is asymmetrical.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES66116D DE486775C (en) | 1924-05-22 | 1924-05-22 | Simulation of the impedance of Pupin lines |
DE105952X | 1924-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT105952B true AT105952B (en) | 1927-03-25 |
Family
ID=29403028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT105952D AT105952B (en) | 1924-05-22 | 1925-06-12 | Simulation of the impedance of Pupin lines. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT105952B (en) |
-
1925
- 1925-06-12 AT AT105952D patent/AT105952B/en active
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