JPS56119547A - Detecting circuit for breaking of signal and mark rate - Google Patents

Detecting circuit for breaking of signal and mark rate

Info

Publication number
JPS56119547A
JPS56119547A JP2185880A JP2185880A JPS56119547A JP S56119547 A JPS56119547 A JP S56119547A JP 2185880 A JP2185880 A JP 2185880A JP 2185880 A JP2185880 A JP 2185880A JP S56119547 A JPS56119547 A JP S56119547A
Authority
JP
Japan
Prior art keywords
signal
time constant
integrating circuit
generated
alarm
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
JP2185880A
Other languages
Japanese (ja)
Inventor
Yoshifumi Toda
Toshiyuki Morita
Hideaki Ito
Kiyoaki Hodohara
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 JP2185880A priority Critical patent/JPS56119547A/en
Publication of JPS56119547A publication Critical patent/JPS56119547A/en
Pending 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
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To independently determine the detection limit for breaking of signal through causing the limit of the detection mark rate to approach 0 and 1, by comparing the output of the integrating circuit, which has a time constant longer than that of the integrating circuit connected to retriggerable multivibrator, with the reference voltage. CONSTITUTION:When input signal 1 of pulse period t1 shorter than time constant CXRX of integrating circuit 14 is given to retriggerable multivibrator 11, Q' output signal 2 continues to be 0 and does not generate the alarm signal. When input signal 1 of pulse period t2 near time constant CXRX is given, output 2 repeates the operation of 0, 1 and averages them to generate the output signal, and pulse perior t2 becomes longer; and when it exceeds the threshold, alarm is generated. If instantaneous breaking sufficently longer than time constant R1C1 of integrating circuit 17 is generated in input signal 1, the alarm signal is generated when output signal 3 of integrating circuit 17 increases and exceeds the threshold voltage. If instantaneous break shorter than time constant R1C1 in the input signal, output signal 3 which does not reach the threshold voltage is reduced, and so alarm is not generated.
JP2185880A 1980-02-23 1980-02-23 Detecting circuit for breaking of signal and mark rate Pending JPS56119547A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2185880A JPS56119547A (en) 1980-02-23 1980-02-23 Detecting circuit for breaking of signal and mark rate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2185880A JPS56119547A (en) 1980-02-23 1980-02-23 Detecting circuit for breaking of signal and mark rate

Publications (1)

Publication Number Publication Date
JPS56119547A true JPS56119547A (en) 1981-09-19

Family

ID=12066806

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2185880A Pending JPS56119547A (en) 1980-02-23 1980-02-23 Detecting circuit for breaking of signal and mark rate

Country Status (1)

Country Link
JP (1) JPS56119547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5860843A (en) * 1981-10-06 1983-04-11 Natl Aerospace Lab Fault judging circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5860843A (en) * 1981-10-06 1983-04-11 Natl Aerospace Lab Fault judging circuit

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