JPS56158558A - Digital communication system - Google Patents

Digital communication system

Info

Publication number
JPS56158558A
JPS56158558A JP6226580A JP6226580A JPS56158558A JP S56158558 A JPS56158558 A JP S56158558A JP 6226580 A JP6226580 A JP 6226580A JP 6226580 A JP6226580 A JP 6226580A JP S56158558 A JPS56158558 A JP S56158558A
Authority
JP
Japan
Prior art keywords
signal
digital device
signal line
terminal devices
digital
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
JP6226580A
Other languages
Japanese (ja)
Inventor
Hiroshi Takahashi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP6226580A priority Critical patent/JPS56158558A/en
Publication of JPS56158558A publication Critical patent/JPS56158558A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/547—Systems for power line communications via DC power distribution

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Dc Digital Transmission (AREA)
  • Small-Scale Networks (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To establish a digital communication efficiently with a low cost, by transmitting a digital signal and electric power from one digital device to another digital device, in the communication between one digital device and another digital device. CONSTITUTION:First, a signal of X=0 is fed from a CPU at sections A, C transmitting electric power, and since a negative voltage of V2 appears on a signal line L1, a current flows to the transformer of interfaces INF1-INFn of terminal devices and a DC positive voltage is fed to terminal devices T1-Tn. On the other hand, when the signal line L1 reaches a signal transmission section B, since the signal line L1 is positive than a common line L2, no current flows to the transformer and the terminal devices T1-Tn are controlled with an inversion signal SIG1 appeared on the signal line L1.
JP6226580A 1980-05-13 1980-05-13 Digital communication system Pending JPS56158558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6226580A JPS56158558A (en) 1980-05-13 1980-05-13 Digital communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6226580A JPS56158558A (en) 1980-05-13 1980-05-13 Digital communication system

Publications (1)

Publication Number Publication Date
JPS56158558A true JPS56158558A (en) 1981-12-07

Family

ID=13195138

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6226580A Pending JPS56158558A (en) 1980-05-13 1980-05-13 Digital communication system

Country Status (1)

Country Link
JP (1) JPS56158558A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143941A (en) * 1981-02-28 1982-09-06 Toyoda Gosei Co Ltd Signal transmitting method
JPS6093848A (en) * 1983-10-26 1985-05-25 Omron Tateisi Electronics Co Multiplex transmission system
JPS60117940A (en) * 1983-11-30 1985-06-25 Matsushita Electric Works Ltd Information transmission system
JPS60117939A (en) * 1983-11-30 1985-06-25 Matsushita Electric Works Ltd Information transmission system
JPS6210949A (en) * 1985-07-08 1987-01-19 Toho Electron Kk Transmitting and receiving equipment
JPS6267944A (en) * 1985-09-19 1987-03-27 Toshiba Corp Data transmission equipment

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143941A (en) * 1981-02-28 1982-09-06 Toyoda Gosei Co Ltd Signal transmitting method
JPS6093848A (en) * 1983-10-26 1985-05-25 Omron Tateisi Electronics Co Multiplex transmission system
JPH0521375B2 (en) * 1983-10-26 1993-03-24 Omron Tateisi Electronics Co
JPS60117940A (en) * 1983-11-30 1985-06-25 Matsushita Electric Works Ltd Information transmission system
JPS60117939A (en) * 1983-11-30 1985-06-25 Matsushita Electric Works Ltd Information transmission system
JPH0525212B2 (en) * 1983-11-30 1993-04-12 Matsushita Electric Works Ltd
JPH0525211B2 (en) * 1983-11-30 1993-04-12 Matsushita Electric Works Ltd
JPS6210949A (en) * 1985-07-08 1987-01-19 Toho Electron Kk Transmitting and receiving equipment
JPH0553342B2 (en) * 1985-07-08 1993-08-09 Toho Erekutoronikusu Kk
JPS6267944A (en) * 1985-09-19 1987-03-27 Toshiba Corp Data transmission equipment
JPH0569335B2 (en) * 1985-09-19 1993-09-30 Tokyo Shibaura Electric Co

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