JPS5665542A - Transmission circuit of square wave signal with isolation - Google Patents

Transmission circuit of square wave signal with isolation

Info

Publication number
JPS5665542A
JPS5665542A JP14151179A JP14151179A JPS5665542A JP S5665542 A JPS5665542 A JP S5665542A JP 14151179 A JP14151179 A JP 14151179A JP 14151179 A JP14151179 A JP 14151179A JP S5665542 A JPS5665542 A JP S5665542A
Authority
JP
Japan
Prior art keywords
isolation
photocouplers
square wave
transmission circuit
input signal
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.)
Granted
Application number
JP14151179A
Other languages
Japanese (ja)
Other versions
JPS6022853B2 (en
Inventor
Masaki Obara
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP54141511A priority Critical patent/JPS6022853B2/en
Publication of JPS5665542A publication Critical patent/JPS5665542A/en
Publication of JPS6022853B2 publication Critical patent/JPS6022853B2/en
Expired 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)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To obtain a square wave isolation transmission circuit which can use optical coupling elements with conventional response speed and is possible to make stable transmission with isolation even at high frequencies, by connecting the input side of two photocouplers in antiparallel connection. CONSTITUTION:The input signal in step change between different two levels with equal time width is transmitted with isolation by using photocouplers. In the circuit for this purpose, the input side of two photocouplers 1, 11 is connected in antiparallel relation and constitution is made that both photocouplers 1, 11 are alternately operated in response to mutually different level of the input signal. Further, the output signal of the couplers 1, 11 is fed to a comparison element 13 to obtain an output signal from the comparison element 13 with isolation to the input signal.
JP54141511A 1979-11-01 1979-11-01 Square wave signal isolated transmission circuit Expired JPS6022853B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54141511A JPS6022853B2 (en) 1979-11-01 1979-11-01 Square wave signal isolated transmission circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54141511A JPS6022853B2 (en) 1979-11-01 1979-11-01 Square wave signal isolated transmission circuit

Publications (2)

Publication Number Publication Date
JPS5665542A true JPS5665542A (en) 1981-06-03
JPS6022853B2 JPS6022853B2 (en) 1985-06-04

Family

ID=15293652

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54141511A Expired JPS6022853B2 (en) 1979-11-01 1979-11-01 Square wave signal isolated transmission circuit

Country Status (1)

Country Link
JP (1) JPS6022853B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008054042A (en) * 2006-08-24 2008-03-06 Yokogawa Electric Corp Insulated contact output circuit
JP2013215005A (en) * 2013-07-17 2013-10-17 Yazaki Corp Circuit for preventing simultaneous on action of relays in relay drive device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008054042A (en) * 2006-08-24 2008-03-06 Yokogawa Electric Corp Insulated contact output circuit
JP2013215005A (en) * 2013-07-17 2013-10-17 Yazaki Corp Circuit for preventing simultaneous on action of relays in relay drive device

Also Published As

Publication number Publication date
JPS6022853B2 (en) 1985-06-04

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