JPS55102950A - Code error detecting circuit - Google Patents

Code error detecting circuit

Info

Publication number
JPS55102950A
JPS55102950A JP936179A JP936179A JPS55102950A JP S55102950 A JPS55102950 A JP S55102950A JP 936179 A JP936179 A JP 936179A JP 936179 A JP936179 A JP 936179A JP S55102950 A JPS55102950 A JP S55102950A
Authority
JP
Japan
Prior art keywords
signal
phase
circuit
code error
detector
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
JP936179A
Other languages
Japanese (ja)
Other versions
JPS622738B2 (en
Inventor
Yasuharu Yoshida
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP936179A priority Critical patent/JPS55102950A/en
Publication of JPS55102950A publication Critical patent/JPS55102950A/en
Publication of JPS622738B2 publication Critical patent/JPS622738B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H04L1/241—Testing correct operation using pseudo-errors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To detect a code error at a high speed by solving astable operation at a DC level of a circuit which exercises supervision over the circuit quality of a digital signal transmission line, by forming this circuit of simple constitution. CONSTITUTION:An input signal is applied to phase detectors 1 and 2; detector 1 is applied with a signal obtaind by phase-shifting a reference carrier by pi/2 by pi/2- phase shifter 3, and detector 2 with the reference carrier to output signals bearing an orthogonal phase relation from detectors 1 and 2. Then, those signals are inputted to discriminators 4 and 6, which output digital signals CH1 and CH2 discriminated and waveform-shaped. Further, an input signal is applied to phase detector 8, which is applied with the reference carrier phase-shifted by DELTAtheta by phase shifter 9 to apply its output to discriminator 10, which generates a signal forced to increase code errors. Then, this signal is applied to exclusive-OR circuit 7 together with the signal discriminated by discriminator 6 to generate a code error signal. Then, variation in the DC level of a circuit generating signals CH1 and CH2 is prevented to detect the code error.
JP936179A 1979-01-30 1979-01-30 Code error detecting circuit Granted JPS55102950A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP936179A JPS55102950A (en) 1979-01-30 1979-01-30 Code error detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP936179A JPS55102950A (en) 1979-01-30 1979-01-30 Code error detecting circuit

Publications (2)

Publication Number Publication Date
JPS55102950A true JPS55102950A (en) 1980-08-06
JPS622738B2 JPS622738B2 (en) 1987-01-21

Family

ID=11718327

Family Applications (1)

Application Number Title Priority Date Filing Date
JP936179A Granted JPS55102950A (en) 1979-01-30 1979-01-30 Code error detecting circuit

Country Status (1)

Country Link
JP (1) JPS55102950A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007190480A (en) * 2006-01-18 2007-08-02 Atsuhiko Kimura Pulverizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007190480A (en) * 2006-01-18 2007-08-02 Atsuhiko Kimura Pulverizer

Also Published As

Publication number Publication date
JPS622738B2 (en) 1987-01-21

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