JPS57119532A - Pulse-trio detecting circuit - Google Patents

Pulse-trio detecting circuit

Info

Publication number
JPS57119532A
JPS57119532A JP56005055A JP505581A JPS57119532A JP S57119532 A JPS57119532 A JP S57119532A JP 56005055 A JP56005055 A JP 56005055A JP 505581 A JP505581 A JP 505581A JP S57119532 A JPS57119532 A JP S57119532A
Authority
JP
Japan
Prior art keywords
pulse
signal
trio
polarity
inputted
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
JP56005055A
Other languages
Japanese (ja)
Other versions
JPS6239866B2 (en
Inventor
Masatomi Hiraga
Koichi Kobayashi
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 JP56005055A priority Critical patent/JPS57119532A/en
Publication of JPS57119532A publication Critical patent/JPS57119532A/en
Publication of JPS6239866B2 publication Critical patent/JPS6239866B2/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
    • H04L25/4917—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 using multilevel codes
    • H04L25/4923—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 using multilevel codes using ternary codes
    • H04L25/4925—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 using multilevel codes using ternary codes using balanced bipolar ternary codes

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To spot the fault point of an intermediate repeater by making a return connection of a transmission line by detecting a constant number of pulse trios sent from a monitor station. CONSTITUTION:A pulse trio A when inputted is separated into positive and negative pulses by a polarity separating circuit 1; every time one pulse trio is processed, an AND circuit 7 outputs one pulse, and every time a counter goes up to a constant number, the polarity is inverted to send an output signal J. When a signal other than the pulse trio signal is inputted, the inversion of polarity is not performed and a signal J is not outputted. Therefore, a call is never cut off by the returning operation of a transmission line, etc., by misjudging a call signal to be a pulse trio signal.
JP56005055A 1981-01-19 1981-01-19 Pulse-trio detecting circuit Granted JPS57119532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56005055A JPS57119532A (en) 1981-01-19 1981-01-19 Pulse-trio detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56005055A JPS57119532A (en) 1981-01-19 1981-01-19 Pulse-trio detecting circuit

Publications (2)

Publication Number Publication Date
JPS57119532A true JPS57119532A (en) 1982-07-26
JPS6239866B2 JPS6239866B2 (en) 1987-08-25

Family

ID=11600707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56005055A Granted JPS57119532A (en) 1981-01-19 1981-01-19 Pulse-trio detecting circuit

Country Status (1)

Country Link
JP (1) JPS57119532A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0273295U (en) * 1988-11-26 1990-06-05
JPH04319638A (en) * 1991-04-18 1992-11-10 Yagi Antenna Co Ltd Water leakage detecting device

Also Published As

Publication number Publication date
JPS6239866B2 (en) 1987-08-25

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