ATE4T1 - CIRCUIT ARRANGEMENT FOR EARTH-FREE TRANSMISSION OF SIGNALS VIA SEPARATION POINTS IN TELECOMMUNICATION SYSTEMS - Google Patents

CIRCUIT ARRANGEMENT FOR EARTH-FREE TRANSMISSION OF SIGNALS VIA SEPARATION POINTS IN TELECOMMUNICATION SYSTEMS

Info

Publication number
ATE4T1
ATE4T1 AT79101813T AT79101813T ATE4T1 AT E4 T1 ATE4 T1 AT E4T1 AT 79101813 T AT79101813 T AT 79101813T AT 79101813 T AT79101813 T AT 79101813T AT E4 T1 ATE4 T1 AT E4T1
Authority
AT
Austria
Prior art keywords
transistor
high frequency
channel
earth
circuit arrangement
Prior art date
Application number
AT79101813T
Other languages
German (de)
Inventor
Josef Huellwegen
Original Assignee
Nixdorf Computer Ag
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
Application filed by Nixdorf Computer Ag filed Critical Nixdorf Computer Ag
Application granted granted Critical
Publication of ATE4T1 publication Critical patent/ATE4T1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0266—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
    • H04L25/0268—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling with modulation and subsequent demodulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electronic Switches (AREA)
  • Dc Digital Transmission (AREA)
  • Networks Using Active Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Transmitters (AREA)
  • Transceivers (AREA)

Abstract

Digital signals are applied to an ungrounded transmission line through a two channel system, one channel being operative in response to a binary "1" the other in response to a binary "0." Each channel, when active, receives high frequency oscillations through a transformer. One side of the transformer is connected to the emitter-collector circuit of a transistor constituting a main rectifier. A buffer transistor has an emitter-collector circuit connected in series with the main rectifier transistor. A rectifier diode connected to the secondary winding of the transformer furnishes a DC signal to switch the buffer transistor to the conductive state only when high frequency oscillations appear across the secondary winding, that is when the channel is active. A high frequency filter between the main rectifier transistor and the buffer transistor prevents high frequency oscillations from reaching the output.
AT79101813T 1978-06-19 1979-06-07 CIRCUIT ARRANGEMENT FOR EARTH-FREE TRANSMISSION OF SIGNALS VIA SEPARATION POINTS IN TELECOMMUNICATION SYSTEMS ATE4T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2826897A DE2826897C2 (en) 1978-06-19 1978-06-19 Circuit arrangement for the floating transmission of signals via isolating points in telecommunications systems
EP79101813A EP0006194B1 (en) 1978-06-19 1979-06-07 Circuit arrangement for the ungrounded transmission of signals across points of isolation in communication systems

Publications (1)

Publication Number Publication Date
ATE4T1 true ATE4T1 (en) 1981-02-15

Family

ID=6042195

Family Applications (1)

Application Number Title Priority Date Filing Date
AT79101813T ATE4T1 (en) 1978-06-19 1979-06-07 CIRCUIT ARRANGEMENT FOR EARTH-FREE TRANSMISSION OF SIGNALS VIA SEPARATION POINTS IN TELECOMMUNICATION SYSTEMS

Country Status (5)

Country Link
US (1) US4297595A (en)
EP (1) EP0006194B1 (en)
JP (1) JPS553298A (en)
AT (1) ATE4T1 (en)
DE (2) DE2826897C2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2126847B (en) * 1982-07-29 1985-09-04 Standard Telephones Cables Ltd Clock extraction from pcm signal
US4510581A (en) * 1983-02-14 1985-04-09 Prime Computer, Inc. High speed buffer allocation apparatus
DE3512280A1 (en) * 1985-04-03 1986-10-09 Nixdorf Computer Ag, 4790 Paderborn CIRCUIT ARRANGEMENT FOR EARTH-FREE TRANSMISSION OF DIGITAL SIGNALS THROUGH DISCONNECTORS
DE3612713C1 (en) * 1986-04-16 1987-09-03 Kloeckner Ferromatik Desma Control device for electrically controllable valves in hydraulic circuits
JPH10500241A (en) * 1995-02-16 1998-01-06 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ Device for converting a resistance value into a control signal dependent on the resistance value, and electric apparatus having such a device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402304A (en) * 1965-04-23 1968-09-17 Honeywell Inc Electrical data processing apparatus
US3612895A (en) * 1969-08-11 1971-10-12 Nasa Pulse coupling circuit
JPS527286B1 (en) * 1970-06-22 1977-03-01
FR2112019B1 (en) * 1970-06-24 1973-11-23 Tranchant Electronique
DE2050994B2 (en) * 1970-10-16 1972-04-27 Nixdorf Computer Ag, 4790 Paderborn METHOD AND CIRCUIT ARRANGEMENT FOR EARTH-FREE TRANSMISSION OF DC SIGNALS
US3737585A (en) * 1971-06-16 1973-06-05 Itt Regenerative pcm line repeater
DE2329823C2 (en) * 1973-06-12 1975-04-10 Keller Spezialtechnik Gmbh, 4533 Laggenbeck DC amplifier arrangement based on the modulation principle
US3946324A (en) * 1973-07-16 1976-03-23 Analog Devices, Incorporated Isolation amplifier
JPS5728966B2 (en) * 1973-08-22 1982-06-19
DE2411871C2 (en) * 1974-03-12 1984-09-13 Nixdorf Computer Ag, 4790 Paderborn Circuit arrangement for the floating transmission of signals via isolating points in telecommunications systems
DE2504785C3 (en) * 1975-02-05 1980-04-24 Nixdorf Computer Ag, 4790 Paderborn Circuit arrangement for the floating transmission of signals via isolating points in telecommunications systems

Also Published As

Publication number Publication date
EP0006194A1 (en) 1980-01-09
DE2826897B1 (en) 1979-05-10
US4297595A (en) 1981-10-27
JPS553298A (en) 1980-01-11
EP0006194B1 (en) 1981-01-07
DE2960124D1 (en) 1981-02-26
DE2826897C2 (en) 1979-12-20
JPS6349937B2 (en) 1988-10-06

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Legal Events

Date Code Title Description
EEFA Change of the company name
REN Ceased due to non-payment of the annual fee
EIH Change in the person of patent owner