JPS5693452A - Digital synchronization detecting circuit - Google Patents

Digital synchronization detecting circuit

Info

Publication number
JPS5693452A
JPS5693452A JP17071179A JP17071179A JPS5693452A JP S5693452 A JPS5693452 A JP S5693452A JP 17071179 A JP17071179 A JP 17071179A JP 17071179 A JP17071179 A JP 17071179A JP S5693452 A JPS5693452 A JP S5693452A
Authority
JP
Japan
Prior art keywords
data
circuit
detecting circuit
synchronization detecting
exclusive
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
JP17071179A
Other languages
Japanese (ja)
Inventor
Hiroyuki Ito
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 JP17071179A priority Critical patent/JPS5693452A/en
Publication of JPS5693452A publication Critical patent/JPS5693452A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/042—Detectors therefor, e.g. correlators, state machines

Landscapes

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

Abstract

PURPOSE:To obtain a high-precision, high-stability, and economical synchronization detecting circuit, by detecting the synchronizing code in serial data digitally. CONSTITUTION:Serial input data 6 is converted to N-bit parallel data 7 by shift register 1, and exclusive OR 9 between data 7 and synchronizing code 8 is calculated by exclusive OR circuit 2. The number of ''1'' obtained by expressing the address with the binary scale is written in data of ROM20 by the binary scale. This number is compared with the number 24 of binary coded allowable error bits, which is set by digital switch 21, by comparing circuit 22, and synchronization detection signal 12 is generated if the former is equal to or smaller than the latter.
JP17071179A 1979-12-27 1979-12-27 Digital synchronization detecting circuit Pending JPS5693452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17071179A JPS5693452A (en) 1979-12-27 1979-12-27 Digital synchronization detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17071179A JPS5693452A (en) 1979-12-27 1979-12-27 Digital synchronization detecting circuit

Publications (1)

Publication Number Publication Date
JPS5693452A true JPS5693452A (en) 1981-07-29

Family

ID=15909976

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17071179A Pending JPS5693452A (en) 1979-12-27 1979-12-27 Digital synchronization detecting circuit

Country Status (1)

Country Link
JP (1) JPS5693452A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62224138A (en) * 1986-03-26 1987-10-02 Kenwood Corp Frame synchronizing pattern correlation detection circuit
EP0574938A2 (en) * 1992-06-19 1993-12-22 Nec Corporation System for detecting non-coincidence of codes
EP0713303A2 (en) 1994-11-15 1996-05-22 Nec Corporation System for detecting non-coincidence of codes

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53105904A (en) * 1977-02-28 1978-09-14 Nec Corp Synchronous pattern detector circuit
JPS54161811A (en) * 1978-06-12 1979-12-21 Mitsubishi Electric Corp Data transmission device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53105904A (en) * 1977-02-28 1978-09-14 Nec Corp Synchronous pattern detector circuit
JPS54161811A (en) * 1978-06-12 1979-12-21 Mitsubishi Electric Corp Data transmission device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62224138A (en) * 1986-03-26 1987-10-02 Kenwood Corp Frame synchronizing pattern correlation detection circuit
EP0574938A2 (en) * 1992-06-19 1993-12-22 Nec Corporation System for detecting non-coincidence of codes
EP0574938A3 (en) * 1992-06-19 1994-03-02 Nec Corp
EP0713303A2 (en) 1994-11-15 1996-05-22 Nec Corporation System for detecting non-coincidence of codes
JPH08139613A (en) * 1994-11-15 1996-05-31 Nec Corp Code coincidence detecting system
US5671228A (en) * 1994-11-15 1997-09-23 Nec Corporation System for detecting non-coincidence of codes

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