FR2269249A1 - Two-wire transmission system - uses current flow detection in differential transformers in closed loop cable network - Google Patents

Two-wire transmission system - uses current flow detection in differential transformers in closed loop cable network

Info

Publication number
FR2269249A1
FR2269249A1 FR7414708A FR7414708A FR2269249A1 FR 2269249 A1 FR2269249 A1 FR 2269249A1 FR 7414708 A FR7414708 A FR 7414708A FR 7414708 A FR7414708 A FR 7414708A FR 2269249 A1 FR2269249 A1 FR 2269249A1
Authority
FR
France
Prior art keywords
transmission system
current flow
differential transformers
winding
closed loop
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.)
Granted
Application number
FR7414708A
Other languages
French (fr)
Other versions
FR2269249B1 (en
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.)
Cegelec SA
Original Assignee
Cegelec SA
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 Cegelec SA filed Critical Cegelec SA
Priority to FR7414708A priority Critical patent/FR2269249A1/en
Publication of FR2269249A1 publication Critical patent/FR2269249A1/en
Application granted granted Critical
Publication of FR2269249B1 publication Critical patent/FR2269249B1/fr
Granted legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)

Abstract

This transmission system uses a code of three current levels flowing in a two-wire system, i.e. positive direction flow, negative flow and no current flow. Toroidal differential transformers link the transmitters and receivers which are thus isolated from the twisted and screened pairs of transmission wires. The transmitter is coupled by a winding to the transformer and has positive and negative sensing gates with pulse width limiters and power amplifiers. A short circuiting winding prevents false information transfer, when not transmitting. The receiver, linked by a transformer winding, has threshold comparators and detector gates with clock pulses generated during data pulse periods.
FR7414708A 1974-04-26 1974-04-26 Two-wire transmission system - uses current flow detection in differential transformers in closed loop cable network Granted FR2269249A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7414708A FR2269249A1 (en) 1974-04-26 1974-04-26 Two-wire transmission system - uses current flow detection in differential transformers in closed loop cable network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7414708A FR2269249A1 (en) 1974-04-26 1974-04-26 Two-wire transmission system - uses current flow detection in differential transformers in closed loop cable network

Publications (2)

Publication Number Publication Date
FR2269249A1 true FR2269249A1 (en) 1975-11-21
FR2269249B1 FR2269249B1 (en) 1976-12-17

Family

ID=9138221

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7414708A Granted FR2269249A1 (en) 1974-04-26 1974-04-26 Two-wire transmission system - uses current flow detection in differential transformers in closed loop cable network

Country Status (1)

Country Link
FR (1) FR2269249A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003754A1 (en) * 1978-02-17 1979-09-05 Siemens Aktiengesellschaft Receiver set for data signals without direct current component
EP0028296A2 (en) * 1979-10-31 1981-05-13 Licentia Patent-Verwaltungs-GmbH Arrangement for power-supply and measurement-data transmission from a central station to several measurement posts
EP0053638A1 (en) * 1978-11-06 1982-06-16 The Boeing Company Current mode data or power bus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003754A1 (en) * 1978-02-17 1979-09-05 Siemens Aktiengesellschaft Receiver set for data signals without direct current component
EP0053638A1 (en) * 1978-11-06 1982-06-16 The Boeing Company Current mode data or power bus
EP0028296A2 (en) * 1979-10-31 1981-05-13 Licentia Patent-Verwaltungs-GmbH Arrangement for power-supply and measurement-data transmission from a central station to several measurement posts
EP0028296A3 (en) * 1979-10-31 1984-11-28 Licentia Patent-Verwaltungs-Gmbh Arrangement for power-supply and measurement-data transmission from a central station to several measurement posts

Also Published As

Publication number Publication date
FR2269249B1 (en) 1976-12-17

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Legal Events

Date Code Title Description
ST Notification of lapse