JPS55149546A - Photo coupling circuit - Google Patents

Photo coupling circuit

Info

Publication number
JPS55149546A
JPS55149546A JP5820379A JP5820379A JPS55149546A JP S55149546 A JPS55149546 A JP S55149546A JP 5820379 A JP5820379 A JP 5820379A JP 5820379 A JP5820379 A JP 5820379A JP S55149546 A JPS55149546 A JP S55149546A
Authority
JP
Japan
Prior art keywords
light emitting
emitting element
photo detector
photo
effect
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
JP5820379A
Other languages
Japanese (ja)
Inventor
Masayuki Nashiki
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.)
Okuma Corp
Original Assignee
Okuma Machinery Works 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 Okuma Machinery Works Ltd filed Critical Okuma Machinery Works Ltd
Priority to JP5820379A priority Critical patent/JPS55149546A/en
Publication of JPS55149546A publication Critical patent/JPS55149546A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • H04B10/801—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections
    • H04B10/802—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections for isolation, e.g. using optocouplers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To enable the high speed response and to avoid the relative potential variation, that is, the effect due to noise, by adding a few components in the optical coupling circuit requesting high speed response. CONSTITUTION:When the digital signal (a) is ''1'', the light emitting element 3 and the photo detector 4 are operated and the light emitting element 9 and the photo detector 10 are inoperative. Accordingly, the output signal (d) is ''1''. When the digital input signal (a) is ''0'', the ''0'' signal is inverted at the inverter 14, the light emitting element 9 and the photo detector 10 are operated, and the light emitting element 3 and the photo detector 4 are inoperative. Accordingly, the output signal (d) is ''0''. If rapid potential change is produced between the DC power supplies 1 and 2, almost the same effect is given to the photo detectors 4 and 10. If rapid potential change gives effect on the both of the photo detectors 4 and 10 so that they are ON, noise current flowing to the photo detectors is equal to the both, no effect is given to the output.
JP5820379A 1979-05-11 1979-05-11 Photo coupling circuit Pending JPS55149546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5820379A JPS55149546A (en) 1979-05-11 1979-05-11 Photo coupling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5820379A JPS55149546A (en) 1979-05-11 1979-05-11 Photo coupling circuit

Publications (1)

Publication Number Publication Date
JPS55149546A true JPS55149546A (en) 1980-11-20

Family

ID=13077465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5820379A Pending JPS55149546A (en) 1979-05-11 1979-05-11 Photo coupling circuit

Country Status (1)

Country Link
JP (1) JPS55149546A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569320A1 (en) * 1984-08-14 1986-02-21 Thomson Csf Coupling device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5314503A (en) * 1976-07-26 1978-02-09 Fujitsu Ltd Photo-communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5314503A (en) * 1976-07-26 1978-02-09 Fujitsu Ltd Photo-communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569320A1 (en) * 1984-08-14 1986-02-21 Thomson Csf Coupling device

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