JPS54122005A - Direct-current data transmitter - Google Patents

Direct-current data transmitter

Info

Publication number
JPS54122005A
JPS54122005A JP2971278A JP2971278A JPS54122005A JP S54122005 A JPS54122005 A JP S54122005A JP 2971278 A JP2971278 A JP 2971278A JP 2971278 A JP2971278 A JP 2971278A JP S54122005 A JPS54122005 A JP S54122005A
Authority
JP
Japan
Prior art keywords
data transmission
photo
semiconductor bridge
current
data
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.)
Pending
Application number
JP2971278A
Other languages
Japanese (ja)
Inventor
Makoto Kawai
Nobuo Yasuda
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP2971278A priority Critical patent/JPS54122005A/en
Publication of JPS54122005A publication Critical patent/JPS54122005A/en
Pending 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
    • H04L25/08—Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults

Landscapes

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

Abstract

PURPOSE:To reduce influence at the time when a high-level noise is superposed with interference among terminal devices removed by electrically disconnecting a transmission line from both data transmission and reception parts of respective terminal devices. CONSTITUTION:This transmitter consists of DC power supply 4 whose output side is separate and independent in terms of direct current, current-direction change-over circuit 5 composed of a semiconductor bridge circuit which receives the DC output of power supply 4 via the photo-detection-side element of a photo coupler and also changes in its normal direction depending upon the externally-inputted logic state, power-application selector circuit 6 which supplies DC power to the semiconductor bridge by driving the photo-detection-side element of the coupler according to a communication request signal generated at a data transmission time, transmission control part 7 which supplies the semiconductor bridge with the data logic state to be transmitted, data transmission part 8 which drives the data transmission line, and reception part 9 which fetches transmitting data via a couple of photo coupler driven to luminesce complementarily depending upon the direction of the current of a couple of transmission lines.
JP2971278A 1978-03-15 1978-03-15 Direct-current data transmitter Pending JPS54122005A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2971278A JPS54122005A (en) 1978-03-15 1978-03-15 Direct-current data transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2971278A JPS54122005A (en) 1978-03-15 1978-03-15 Direct-current data transmitter

Publications (1)

Publication Number Publication Date
JPS54122005A true JPS54122005A (en) 1979-09-21

Family

ID=12283712

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2971278A Pending JPS54122005A (en) 1978-03-15 1978-03-15 Direct-current data transmitter

Country Status (1)

Country Link
JP (1) JPS54122005A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058562A (en) * 1983-09-12 1985-04-04 Matsushita Electric Ind Co Ltd Measuring device for electrical equipment

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143049U (en) * 1974-09-27 1976-03-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143049U (en) * 1974-09-27 1976-03-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058562A (en) * 1983-09-12 1985-04-04 Matsushita Electric Ind Co Ltd Measuring device for electrical equipment

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