JPS56149134A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS56149134A
JPS56149134A JP5330680A JP5330680A JPS56149134A JP S56149134 A JPS56149134 A JP S56149134A JP 5330680 A JP5330680 A JP 5330680A JP 5330680 A JP5330680 A JP 5330680A JP S56149134 A JPS56149134 A JP S56149134A
Authority
JP
Japan
Prior art keywords
signal
output
equipment
signals
terminal equipment
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
JP5330680A
Other languages
Japanese (ja)
Inventor
Shoichiro Shoda
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 JP5330680A priority Critical patent/JPS56149134A/en
Publication of JPS56149134A publication Critical patent/JPS56149134A/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
    • H04L25/20—Repeater circuits; Relay circuits
    • H04L25/26—Circuits with optical sensing means, i.e. using opto-couplers for isolation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To perform communication between terminal equipment via only two communication lines, by performing data communication by using a logic circuit for transmission and reception which use photocouplers between terminal equipment. CONSTITUTION:When transmitted signals A and B are outputted from terminal equipment 1 and 2, inversion output O of comparator 12 is outputted as OR between transmitted signals A and B of equipment 1 and 2. Inversion output E of comparator 13 shows AND between transmitted signals A and B. Output D is inputted to exclusive OR gate 18. Output signal F is that obtained by excluding signal A from the sum of signals A and B output G obtained, when signals E and F are applied to OR circuit 19, is shaped by passing through filter 20 to obtain received signal B' to signal B. Similarly, equipment 2 obtains received signal A' to transmitted signal A. Thus, the transmission and reception of data are carried out by using two lines between the equipment.
JP5330680A 1980-04-21 1980-04-21 Data transmission system Pending JPS56149134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5330680A JPS56149134A (en) 1980-04-21 1980-04-21 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5330680A JPS56149134A (en) 1980-04-21 1980-04-21 Data transmission system

Publications (1)

Publication Number Publication Date
JPS56149134A true JPS56149134A (en) 1981-11-18

Family

ID=12939028

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5330680A Pending JPS56149134A (en) 1980-04-21 1980-04-21 Data transmission system

Country Status (1)

Country Link
JP (1) JPS56149134A (en)

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