[go: up one dir, main page]

JPS56158556A - Digital communication system - Google Patents

Digital communication system

Info

Publication number
JPS56158556A
JPS56158556A JP6226380A JP6226380A JPS56158556A JP S56158556 A JPS56158556 A JP S56158556A JP 6226380 A JP6226380 A JP 6226380A JP 6226380 A JP6226380 A JP 6226380A JP S56158556 A JPS56158556 A JP S56158556A
Authority
JP
Japan
Prior art keywords
signal
cpu
fed
digital communication
terminal devices
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
JP6226380A
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 JP6226380A priority Critical patent/JPS56158556A/en
Publication of JPS56158556A publication Critical patent/JPS56158556A/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
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
    • 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 low cost, by assigning a given section appeared with a start or stop bit for the transmission of electric power, in a digital communication system using a start-stop synchronizing signal transmitting method. CONSTITUTION:At sections A, C transmitting electric power, a signal of X=0 is transmitted from a CPU, and since a negative voltage V2 appears at a signal line L1 against a common line L2, a current flows to a transformer of interfaces INF1-INFn of a terminal device and a DC positive voltage is fed to terminal devices T1-Tn. On the other hand, when the signal line L1 comes to a signal transmission section B, no current flows to the transformer since it is at positive potential with the common line L2. The terminal devices T1-Tn are controlled with the inversion signal of SIG1 appeared on the signal line L1. When a signal train is fed from the terminal devices T1-Tn to the CPU, the inversion signal of SIG3 appears on the signal line L1, it enters the INF of the CPU side and fed to the CPU for a given operation control.
JP6226380A 1980-05-13 1980-05-13 Digital communication system Pending JPS56158556A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6226380A JPS56158556A (en) 1980-05-13 1980-05-13 Digital communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6226380A JPS56158556A (en) 1980-05-13 1980-05-13 Digital communication system

Publications (1)

Publication Number Publication Date
JPS56158556A true JPS56158556A (en) 1981-12-07

Family

ID=13195079

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6226380A Pending JPS56158556A (en) 1980-05-13 1980-05-13 Digital communication system

Country Status (1)

Country Link
JP (1) JPS56158556A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS574846U (en) * 1980-06-09 1982-01-11
JPS5945740A (en) * 1982-09-09 1984-03-14 Fuji Electric Co Ltd Measured value transmission system
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
JPS6267944A (en) * 1985-09-19 1987-03-27 Toshiba Corp Data transmission equipment
JPS6419806A (en) * 1987-07-15 1989-01-23 Arimura Inst Technology Modulating method
JP2010262604A (en) * 2009-05-11 2010-11-18 Sony Corp Power supply device, power receiving device, power supply system, and power supply method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS574846U (en) * 1980-06-09 1982-01-11
JPS5945740A (en) * 1982-09-09 1984-03-14 Fuji Electric Co Ltd Measured value transmission system
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
JPS6267944A (en) * 1985-09-19 1987-03-27 Toshiba Corp Data transmission equipment
JPS6419806A (en) * 1987-07-15 1989-01-23 Arimura Inst Technology Modulating method
JP2010262604A (en) * 2009-05-11 2010-11-18 Sony Corp Power supply device, power receiving device, power supply system, and power supply method

Similar Documents

Publication Publication Date Title
FI973168A0 (en) Data- and stroemtillfoersel foerverkligande kabelanpassning
JPS56158556A (en) Digital communication system
TW359032B (en) Current-mode bidirectional input/output buffer
JPS56158557A (en) Digital communication system
JPS56158558A (en) Digital communication system
JPS56104561A (en) Data transmission system
DE59711867D1 (en) Method and device for the transmitterless coupling of a subscriber station to a bus
DE3360649D1 (en) Apparatus for monitoring current levels in an a.c. transmission line
JPS5789357A (en) Control method for power on and off
FI954027A0 (en) Apparatus and method for transmitting information by means of a signal and a signal used in such equipment
DE3478383D1 (en) Energy-saving switching device
JPS6461140A (en) Data transmission equipment
JPS5739646A (en) Interruption controlling system during communication
JPS5696540A (en) Circuit device for feeding to middle position of communication transmission technique by monitoring output voltage of at least one feeding position
SU766936A1 (en) Device for coding branched rail network
JPS5725743A (en) Maintenance system of radio telephone system
JPS57171855A (en) Optical transmitting and receiving equipment
JPS5613850A (en) Secondary signal piling transmission system
JPS55137755A (en) Integrated communication system
JPS56105504A (en) Control device
JPS54139306A (en) Start system for data transmission
JPS57211858A (en) Pulse sending circuit
JPS57150250A (en) Digital signal transmission system
JPS5757050A (en) Light repeater
DE59008489D1 (en) Method for the in-service monitoring of transmission devices for electrical communication technology and device for carrying out the method.