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

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 Measuring 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 (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS574846U (en) * 1980-06-09 1982-01-11
JPH0316815B2 (en) * 1982-09-09 1991-03-06 Fuji Electric Co Ltd
JPS5945740A (en) * 1982-09-09 1984-03-14 Fuji Electric Co Ltd Measuring value transmission system
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
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
JPS6419806A (en) * 1987-07-15 1989-01-23 Arimura Inst Technology Modulating method
JPH053164B2 (en) * 1987-07-15 1993-01-14 Menotsukusu Kk
JP2010262604A (en) * 2009-05-11 2010-11-18 Sony Corp Power supply device, power receiving device, power supply system, and power supply method

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