JPS57106267A - Signal transmission system - Google Patents

Signal transmission system

Info

Publication number
JPS57106267A
JPS57106267A JP55182193A JP18219380A JPS57106267A JP S57106267 A JPS57106267 A JP S57106267A JP 55182193 A JP55182193 A JP 55182193A JP 18219380 A JP18219380 A JP 18219380A JP S57106267 A JPS57106267 A JP S57106267A
Authority
JP
Japan
Prior art keywords
signal
circuit
transmission data
data train
original transmission
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
JP55182193A
Other languages
Japanese (ja)
Other versions
JPS6329868B2 (en
Inventor
Kazuo Azeyama
Yuji Kitano
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55182193A priority Critical patent/JPS57106267A/en
Publication of JPS57106267A publication Critical patent/JPS57106267A/en
Publication of JPS6329868B2 publication Critical patent/JPS6329868B2/ja
Granted 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
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4902—Pulse width modulation; Pulse position modulation

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To make the frequency band of a transmission system equal to the frequency of an input signal, by detecting the no-signal state of an original transmission data string to generate a prescribed signal and by transmitting this signal additionally to the original data train. CONSTITUTION:In the transmission side, a circuit 2 which delays an original transmission data string by a time corresponding to a preliminarily set number of clocks, a circuit 3 which detects the no-signal state in the original transmission data train, and an oscillating circuit 4 which outputs a no-signal state indicating signal having a predetermined pulse width on a basis of the no-signal detection output are provided, and the no-signal state indicating signal is superposed onto the delayed original transmission data string to generate and transmit a transmission data train. In the receiving side, a pulse width discriminating circuit 8 which detects the no-signal state indicating signal in the receiving data train and a circuit 9 which delays the receiving data train by a time corresponding to a preliminarily set number of clocks are provided, and the circuit 9 is reset on a basis of the result of the pulse width discrimination to reproduce the original transmission data train.
JP55182193A 1980-12-22 1980-12-22 Signal transmission system Granted JPS57106267A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55182193A JPS57106267A (en) 1980-12-22 1980-12-22 Signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55182193A JPS57106267A (en) 1980-12-22 1980-12-22 Signal transmission system

Publications (2)

Publication Number Publication Date
JPS57106267A true JPS57106267A (en) 1982-07-02
JPS6329868B2 JPS6329868B2 (en) 1988-06-15

Family

ID=16113960

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55182193A Granted JPS57106267A (en) 1980-12-22 1980-12-22 Signal transmission system

Country Status (1)

Country Link
JP (1) JPS57106267A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55110448A (en) * 1979-02-19 1980-08-25 Hitachi Ltd Digital signal transmission system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55110448A (en) * 1979-02-19 1980-08-25 Hitachi Ltd Digital signal transmission system

Also Published As

Publication number Publication date
JPS6329868B2 (en) 1988-06-15

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