DE465577C - Extension cable for a telephone line with amplifiers - Google Patents
Extension cable for a telephone line with amplifiersInfo
- Publication number
- DE465577C DE465577C DES68043D DES0068043D DE465577C DE 465577 C DE465577 C DE 465577C DE S68043 D DES68043 D DE S68043D DE S0068043 D DES0068043 D DE S0068043D DE 465577 C DE465577 C DE 465577C
- Authority
- DE
- Germany
- Prior art keywords
- amplifiers
- telephone line
- cable
- line
- extension cable
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/40—Artificial lines; Networks simulating a line of certain length
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/26—Improving frequency characteristic by the use of loading coils
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
Verlängerungsleitung für eine Fernsrechleitung mit Verstärkern Im Hauptpatent 46¢ 821 ist eine Fernsprechleitung mit über die Leitung verteilten Verstärkern angegeben, bei welcher Leitungsstrecken durch geeignete Kunstleitungen derart verlängert sind, daß bestimmte Abschnitte der Leitung hinsichtlich ihrer Dämpfung und Verzerrung gleich sind. Diese Kunstleitungen bestehen, um den von der Frequenz abhängigen Verlauf der Dämpfung und des Wellenwiderstandes eines entsprechenden Kabelstückes innerhalb des für die Sprachübertragung notwendigen Frequenzbereichs richtig wiedergeben zu können, nicht nur aus Ohmschen Widerständen, sondern, müssen auch Reaktanzen enthalten.Extension cable for a telephone line with amplifiers Im Main patent 46 821 is a telephone line with amplifiers distributed over the line indicated at which line sections are extended in this way by means of suitable artificial lines are that certain sections of the line in terms of their attenuation and distortion are the same. These artificial lines consist of a course that depends on the frequency the attenuation and the characteristic impedance of a corresponding piece of cable within correctly reproduce the frequency range required for voice transmission can, not only from ohmic resistances, but must also contain reactances.
Die Erfindung bezieht sich auf Eine für die praktischen Bedürfnisse besonders geeignete Form 'dieser künstlichen Verlängerungsleitung.The invention relates to one for practical needs particularly suitable form 'of this artificial extension cable.
Nach der Erfindung besteht die verzerrende Verlängerungsleitung aus einem Kettenleiter, dessen im Zug der Leitung liegende Schaltelemente aus Ohmschem Widerstand und Induktivität bestehen, zu denen noch ein Kondensator parallel liegen kann, während quer zur Leitung Ohmsche Widerstände geschaltet sind.According to the invention, the distorting extension line consists of a chain conductor, the switching elements of which are made of ohmic chemistry and are located in the train of the line Resistance and inductance exist, with a capacitor in parallel can, while ohmic resistances are connected across the line.
In der Abb. i ist beispielsweise eine aus nur einem Glied erster Art bestehende Kunstleitung dargestellt, deren Wirkungsweise in den Abb. 2 bis 4 erläutert ist. In der Abb. i liegt im Zug der Leitung ein Ohmscher Widerstand R und eine Induktivität L in Reihe. Parallel zu dieser Reihenschaltung liegt der Kondensator C, der unter Umständen auch fehlen kann. Es lassen sich jedoch in der Regel die charakteristischen Eigenschaften der normalen Kabel besser wiedergeben, wenn der Kondensator eingeschaltet ist.In Fig. I, for example, there is one of only one link of the first type Existing art pipeline is shown, the mode of operation of which is explained in Figs. 2 to 4 is. In Fig. I there is an ohmic resistance R and an inductance in the train of the line L in series. In parallel with this series connection is the capacitor C, which is below Circumstances may also be absent. As a rule, however, the characteristic Properties of normal cables reproduce better when the capacitor is switched on is.
Die Vorteile der erfindungsgemäßen Kunstleitung gegenüber der bekannten, aus Ohmschen Widerständen bestehenden, gehen aus den Vergleichskurven in Abb. 2 bis 4 hervor. Sowohl das Vergleichsstück des Normalkabels sowie die Kunstleitungen sind hierbei am Ende an .ein langes Normalkabel angeschlossen, so daß die in der Praxis vorliegenden Verhältnisse zugrunde liegen. In Abb. 2 ist der Verlauf des Realteils, in Abb. 3 der des Imaginärteils des Eingangswiderstandes, in Abb. 4 der Verlauf der wirklichen Dämpfung in Abhängigkeit von der Frequenz dargestellt. Unter wirklicher Dämpfung ist die Quadratwurzel aus dem Verhältnis der Leistungen am Ende und am Anfang der zu vergleichenden Leitungen zu verstehen. Die Kurven i der Abbildungen geben die Werte eines Normalkabels bestimmter Länge wieder, die Kurven :2 und 3 die Werte von Verlängerungsleitungen, die das betreffende Kabelstück ,ersetzen sollen, und zwar beziehen sich die Kurven 2 auf die bekannte, aus Ohmschen Widerständen bestehende Form, die Kurven 3 ang die erfindungsgemäße, verzerrende Verlängerungsleitung.The advantages of the artificial line according to the invention over the known, consisting of ohmic resistances are based on the comparison curves in Fig. 2 up to 4. Both the comparison piece of the normal cable and the artificial cables are connected to a long normal cable at the end so that the in the Practice existing conditions are based. In Fig. 2 the course of the Real part, in Fig. 3 that of the imaginary part of the input resistance, in Fig. 4 the The course of the actual damping is shown as a function of the frequency. Under real attenuation is the square root of the ratio of benefits at the end and to be understood at the beginning of the lines to be compared. The curves i of the figures show the values of a normal cable of a certain length, the curves: 2 and 3 the values of extension cables that are intended to replace the relevant cable section, namely, the curves 2 relate to the known, from ohmic resistances existing shape, the curves 3 ang the distorting extension line according to the invention.
Wie aus den Abbildungen hervorgeht, ist bei der verzerrenden Verlängerung besonders die Verbesserung der Nachbildung des Realteils für höhere Frequenzen beträchtlich, und auch der Verlauf der Dämpfung, dessen Charakter durch die bekannte Form überhaupt nicht wiedergegeben werden kann, entspricht im wesentlichen dem Verlauf der Kabeldämpfung.As can be seen from the figures, the elongation is distorted especially the improvement of the simulation of the real part for higher frequencies considerably, and also the course of the damping, its character due to the known shape in general cannot be reproduced, essentially corresponds to the course of the cable attenuation.
Claims (2)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL17022D NL17022C (en) | 1924-03-10 | ||
DES68043D DE465577C (en) | 1924-03-10 | 1924-12-09 | Extension cable for a telephone line with amplifiers |
FR594849D FR594849A (en) | 1924-03-10 | 1925-03-07 | Telephone line with amplifiers distributed on the line |
GB642025A GB230495A (en) | 1924-03-10 | 1925-03-09 | Improvements in or relating to telephone lines |
AT103848D AT103848B (en) | 1924-03-10 | 1925-03-10 | Telephone line with amplifiers distributed over the line. |
GB726425A GB244396A (en) | 1924-03-10 | 1925-03-17 | Improvements in or relating to telephone lines or cables |
DES75056D DE465578C (en) | 1924-03-10 | 1926-06-22 | Extension line |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES65409D DE464821C (en) | 1924-03-10 | 1924-03-10 | Telephone line with amplifiers distributed over the line |
DES68043D DE465577C (en) | 1924-03-10 | 1924-12-09 | Extension cable for a telephone line with amplifiers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE465577C true DE465577C (en) | 1928-09-22 |
Family
ID=27789672
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES68043D Expired DE465577C (en) | 1924-03-10 | 1924-12-09 | Extension cable for a telephone line with amplifiers |
Country Status (5)
Country | Link |
---|---|
AT (1) | AT103848B (en) |
DE (1) | DE465577C (en) |
FR (1) | FR594849A (en) |
GB (2) | GB230495A (en) |
NL (1) | NL17022C (en) |
-
0
- NL NL17022D patent/NL17022C/xx active
-
1924
- 1924-12-09 DE DES68043D patent/DE465577C/en not_active Expired
-
1925
- 1925-03-07 FR FR594849D patent/FR594849A/en not_active Expired
- 1925-03-09 GB GB642025A patent/GB230495A/en not_active Expired
- 1925-03-10 AT AT103848D patent/AT103848B/en active
- 1925-03-17 GB GB726425A patent/GB244396A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
AT103848B (en) | 1926-07-26 |
FR594849A (en) | 1925-09-19 |
GB244396A (en) | 1926-06-10 |
NL17022C (en) | |
GB230495A (en) | 1925-05-14 |
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