DE849572C - Circuit arrangement for controlling the transmission rate of telecommunication systems - Google Patents

Circuit arrangement for controlling the transmission rate of telecommunication systems

Info

Publication number
DE849572C
DE849572C DEP1584A DEP0001584A DE849572C DE 849572 C DE849572 C DE 849572C DE P1584 A DEP1584 A DE P1584A DE P0001584 A DEP0001584 A DE P0001584A DE 849572 C DE849572 C DE 849572C
Authority
DE
Germany
Prior art keywords
controlling
circuit arrangement
noise
transmission rate
telecommunication systems
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
Application number
DEP1584A
Other languages
German (de)
Inventor
Rudolf Wagner
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
Priority claimed from DEP699A external-priority patent/DE842503C/en
Application filed by Individual filed Critical Individual
Priority to DEP1584A priority Critical patent/DE849572C/en
Application granted granted Critical
Publication of DE849572C publication Critical patent/DE849572C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Filters And Equalizers (AREA)

Description

Wird das im Patent 842 503 beschriebene Schaltglied zur Beseitigung von Rückkopplungsvorgängen in Gabelschaltungen verwendet, so wird man es zweckmäßig in der in Abb. 2 dargestellten Weise einsetzen. Hierin bedeuten A" B, C und die Ziffern i bis 8 dieselben Punkte und Teile, wie im Hauptpatent beschrieben. 9 und io sind Einrichtungen, die Gegenstand vorliegender Erfindung sind und weiter unten erläutert werden. 11, 12 und 13 sind Elektronenröhren, 14 der Ausgleichsübertrager und 15 die .Nachbildung einer Gabelschaltung. Bei 14 auftretende Rückkopplungsspannungen gelangen normalerweise in die abgehende Richtung, aber auch gleichzeitig über die Röhre 7 in das im Hauptpatent beschriebene Schaltglied und über 13 wieder, nunmehr gegenphasig, in die abgehende Richtung, so daß der Rückkopplungsvorgang hier kompensiert und damit unwirksam wird.If the switching element described in patent 842 503 is used to eliminate feedback processes in hybrid circuits, it will expediently be used in the manner shown in FIG. Herein, A " B, C and the numerals i to 8 denote the same items and parts as described in the main patent. 9 and io are devices which are the subject of the present invention and will be explained below. 11, 12 and 13 are electron tubes, 14 of the Equalizing transformer and 15, the simulation of a hybrid circuit. Feedback voltages occurring at 14 normally get in the outgoing direction, but also at the same time via the tube 7 in the switching element described in the main patent and via 13 again, now in phase opposition, in the outgoing direction, so that the feedback process here is compensated and thus ineffective.

Hierbei hat sich herausgestellt, daß bei höherer Verstärkung doch noch ein Aufschwingen des Kreises eintritt, und zwar durch die bei der Von behandlung der Kompensationsspannung entstandenen Verzerrungsreste und durch natürliche Geräusche, z. B. Röhrengeräusche. Ferner entstehen bei der Kompensation in den Nulldurchgängen bei nicht genauer Phasenangleichung kurzzeitige Impulse (Zacken), die ebenfalls zum Aufschwingen beitragen.It has been found that with a higher gain Another upward swinging of the circle occurs, namely through the treatment from residual distortion caused by the compensation voltage and by natural noises, z. B. Tube noises. Furthermore, the compensation occurs in the zero crossings if the phase adjustment is not precise, short-term impulses (spikes), which also contribute to the swing.

In Weiterbildung der Erfindung werden diese Vorgänge dadurch beseitigt, daß im Zuge der Hauptübertragungsrichtung eine Geräuschsperre (Filter) eingeschaltet wird. Sie besteht nach der Erfindung aus einer Gegentaktgleichrichteranordnung, die eine negative Vorspannung in Höhe der zu sperrenden Amplituden erhält, soweit diese im Bereich des zu übertragenden Frequenzbandes auftreten. Außerhalb des Übertragungsbereiches werden sie durch übliche Filter (Hoch-, Tief- oder Bandpässe usw.) beseitigt. Abb. i zeigt die Geräuschsperre allein, 9 in Abb. 2 ihre Einschaltung und i o die Einschaltung des üblichen Filters in den Cbertragungsweg. Die Einschaltung erfolgt vor der Röhre (2), vor deren Eingang die Betriebs- bzw. Phasenangleichspannung abgenommen wird.In a further development of the invention, these processes are eliminated by that in the course of the main transmission direction a noise barrier (filter) is switched on will. According to the invention, it consists of a push-pull rectifier arrangement, which receives a negative bias in the amount of the amplitudes to be blocked, insofar as these occur in the range of the frequency band to be transmitted. Outside the transmission range they are eliminated by common filters (high, low or band pass, etc.). Fig. i shows the noise barrier alone, 9 in Fig. 2 its activation and i o the activation of the usual filter in the transmission path. It is switched on in front of the tube (2), at the input of which the operating or phase adjustment voltage is taken.

Die Geräuschsperre hat die Nebenwirkung, daß von den zu übertragenden Wechselspannungen ein geringer Teil des Fußes jeder Halbwelle abgeschnitten wird. Die dadurch verursachten Verzerrungen sind jedoch gering und für die Verständlichkeit (Klirrfakt-or) tragbar.The noise blocker has the side effect of being transmitted by the AC voltages a small part of the foot of each half-wave is cut off. The distortions caused by this are however small and for the comprehensibility (Distortion factor) portable.

Die Kennlinien der Gleichrichter können mit den üblichen Mitteln linearisiert werden.The characteristic curves of the rectifiers can be linearized with the usual means will.

Claims (2)

PATENTANSPRÜCHE: i. Schaltungsanordnung zur Steuerung des übertragungsgrades von Fernmeldeanlagen für beide Verkehrsrichtungen, insbesondere zur Unterdrückung von Rückkopplungsvorgängen in Gabelschaltungen, nach Patent 842 503, dadurch gekennzeichnet, daß die durch die Vorbehandltrng der Kompensationsspannungen auftretenden Spannungsreste und sonstigen Geräuschspannungen außer durch Filter bekannter Art durch Einschalten eines Geräuschfilters (-sperre) in den Hauptübertragungsweg beseitigt werden. PATENT CLAIMS: i. Circuit arrangement for controlling the degree of transmission of telecommunications systems for both traffic directions, in particular for the suppression of feedback processes in hybrid circuits, according to patent 842 503, characterized in that the residual voltage and other noise voltages occurring due to the pretreatment of the compensation voltages, apart from through filters of a known type, by switching on a noise filter (- lock) in the main transmission path. 2. Geräuschfilter (-sperre) nach Anspruch i, dadurch gekennzeichnet, daß ,eine Gegenta.ktgleichrichteranordnung eine negative Gleichvorspannung in der Höhe erhält, die der Maximalamplitude der zu unterdrückenden Restspannungen und der sonstigen Geräuschspannungen entspricht. Angezogene Druckschriften: Deutsche Patentschriften Nr. 672 795, 561 825, 541o86.2. noise filter (lock) according to claim i, characterized in that , a counterbalance rectifier arrangement has a negative DC bias in height receives the maximum amplitude of the residual stresses to be suppressed and the others Corresponds to noise voltages. Referred publications: German patents No. 672 795, 561 825, 541o86.
DEP1584A 1948-12-09 1949-01-23 Circuit arrangement for controlling the transmission rate of telecommunication systems Expired DE849572C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP1584A DE849572C (en) 1948-12-09 1949-01-23 Circuit arrangement for controlling the transmission rate of telecommunication systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP699A DE842503C (en) 1948-12-09 1948-12-09 Circuit arrangement for controlling the transmission rate of telecommunication systems
DEP1584A DE849572C (en) 1948-12-09 1949-01-23 Circuit arrangement for controlling the transmission rate of telecommunication systems

Publications (1)

Publication Number Publication Date
DE849572C true DE849572C (en) 1952-09-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEP1584A Expired DE849572C (en) 1948-12-09 1949-01-23 Circuit arrangement for controlling the transmission rate of telecommunication systems

Country Status (1)

Country Link
DE (1) DE849572C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1283293B (en) * 1964-09-10 1968-11-21 Nippon Electric Co Echo suppression circuit for a wide area communication link

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE541086C (en) * 1929-07-03 1932-01-09 Int Standard Electric Corp Echo or feedback lock for transmission systems
DE561825C (en) * 1929-02-15 1932-10-19 Callender S Cable Four-wire connection with built-in amplifiers, in which the amplified incoming voltage is applied from the fork point of the outgoing line
DE672795C (en) * 1933-03-01 1939-03-10 Gen Electric Co Ltd Signal transmission system with two transmission paths in which blocking devices controlled by the signal streams are switched on

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE561825C (en) * 1929-02-15 1932-10-19 Callender S Cable Four-wire connection with built-in amplifiers, in which the amplified incoming voltage is applied from the fork point of the outgoing line
DE541086C (en) * 1929-07-03 1932-01-09 Int Standard Electric Corp Echo or feedback lock for transmission systems
DE672795C (en) * 1933-03-01 1939-03-10 Gen Electric Co Ltd Signal transmission system with two transmission paths in which blocking devices controlled by the signal streams are switched on

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1283293B (en) * 1964-09-10 1968-11-21 Nippon Electric Co Echo suppression circuit for a wide area communication link

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