JPS56152346A - Optical transmission and receiving device - Google Patents

Optical transmission and receiving device

Info

Publication number
JPS56152346A
JPS56152346A JP5448980A JP5448980A JPS56152346A JP S56152346 A JPS56152346 A JP S56152346A JP 5448980 A JP5448980 A JP 5448980A JP 5448980 A JP5448980 A JP 5448980A JP S56152346 A JPS56152346 A JP S56152346A
Authority
JP
Japan
Prior art keywords
pulse width
transmission
rise
signal
data
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
JP5448980A
Other languages
Japanese (ja)
Inventor
Mitsuo Imai
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable 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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP5448980A priority Critical patent/JPS56152346A/en
Publication of JPS56152346A publication Critical patent/JPS56152346A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/026—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse time characteristics modulation, e.g. width, position, interval

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Optical Communication System (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To improve the transmission speed and extend the signal speed range to multiplex the signal, by modulating the digital pulse width of transmission data and by using rise and fall timings of this transmission data as optical signals synchronized with transmission clocks. CONSTITUTION:The digital pulse width of transmission data SD is modulated preliminarily by pulse width modulator 11, and transmission data which has rise and fall timings synchronized with transmission clock ST is converted to a light by photoelectric converter 12 and passes in optical fiber 13. This optical signal is converted to an electric signal by photoelectric converter 14, and code 1 or 0 of data is decided in accordance with the pulse width by pulse width modulator 15, thus reproducing receiving data RD. Since pulse width modulation signal PWM is modulated synchronously with the rise or the fall of transmission clock ST, receiving clock RT is realized only by 1/2 frequency division in frequency dividing circuit 16 for the rise of signal PWM.
JP5448980A 1980-04-24 1980-04-24 Optical transmission and receiving device Pending JPS56152346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5448980A JPS56152346A (en) 1980-04-24 1980-04-24 Optical transmission and receiving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5448980A JPS56152346A (en) 1980-04-24 1980-04-24 Optical transmission and receiving device

Publications (1)

Publication Number Publication Date
JPS56152346A true JPS56152346A (en) 1981-11-25

Family

ID=12972050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5448980A Pending JPS56152346A (en) 1980-04-24 1980-04-24 Optical transmission and receiving device

Country Status (1)

Country Link
JP (1) JPS56152346A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01236749A (en) * 1989-01-23 1989-09-21 Hitachi Ltd Method and equipment for transmitting/receiving signal
JP2006303663A (en) * 2005-04-18 2006-11-02 Nec Electronics Corp Optically-coupled isolation circuit
JP2008311829A (en) * 2007-06-13 2008-12-25 Seiko Npc Corp Single-wire system data communication method and data communication apparatus
JP2011077791A (en) * 2009-09-30 2011-04-14 Nec Corp Data transmission system and method, and data sending apparatus and receiving apparatus
JP2011160096A (en) * 2010-01-29 2011-08-18 Toshiba Corp Optical transmission circuit, optical reception circuit, and optically coupled isolation circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01236749A (en) * 1989-01-23 1989-09-21 Hitachi Ltd Method and equipment for transmitting/receiving signal
JP2006303663A (en) * 2005-04-18 2006-11-02 Nec Electronics Corp Optically-coupled isolation circuit
JP2008311829A (en) * 2007-06-13 2008-12-25 Seiko Npc Corp Single-wire system data communication method and data communication apparatus
JP2011077791A (en) * 2009-09-30 2011-04-14 Nec Corp Data transmission system and method, and data sending apparatus and receiving apparatus
US8553756B2 (en) 2009-09-30 2013-10-08 Nec Corporation Data transmission system and method, and data sending apparatus and receiving apparatus
JP2011160096A (en) * 2010-01-29 2011-08-18 Toshiba Corp Optical transmission circuit, optical reception circuit, and optically coupled isolation circuit

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