JPS54158811A - Frame synchronizer - Google Patents

Frame synchronizer

Info

Publication number
JPS54158811A
JPS54158811A JP6793378A JP6793378A JPS54158811A JP S54158811 A JPS54158811 A JP S54158811A JP 6793378 A JP6793378 A JP 6793378A JP 6793378 A JP6793378 A JP 6793378A JP S54158811 A JPS54158811 A JP S54158811A
Authority
JP
Japan
Prior art keywords
circuit
frame
output
synchronization
register
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
JP6793378A
Other languages
Japanese (ja)
Inventor
Junichi Yugawa
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 JP6793378A priority Critical patent/JPS54158811A/en
Publication of JPS54158811A publication Critical patent/JPS54158811A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0602—Systems characterised by the synchronising information used
    • H04J3/0605—Special codes used as synchronising signal

Abstract

PURPOSE:To make synchronous leading-in slow and also to obtain a device of simple constitution whose circuit scale will not enlarge at the time of frame synchronization at a reception side for code transmission with frame-synchronous bits. CONSTITUTION:This device is equipped with frame detection circuit 24 which outputs a binary signal corresponding to a synchronization pattern by making a decision, bit by bit, on whether the frame synchronization pattern is included in sequence 16 of received codes, shift register 26 which has one-frame memory capacity, and coincidence detection circuit 28 which performs AND between outputs of circuit 24 and register 26. Further, this is provided with frame pulse generating circuit 13 which generates frame synchronizing pulses and synchronization protective circuit 11 which receives synchronizaing pulses of this circuit 13; in an asynchronization state, the output of circuit 28 is supplied as a reset signal to circuit 13 while the output of circuit 13 is supplied to both register 26 and circuit 11. In a synchronization state, on the other hand, the supply of the output of circuit 28 to circuit 13 is stopped and the same information as the output of circuit 24 is applied to circuit 11 by logical control circuit 65 provided.
JP6793378A 1978-06-05 1978-06-05 Frame synchronizer Pending JPS54158811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6793378A JPS54158811A (en) 1978-06-05 1978-06-05 Frame synchronizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6793378A JPS54158811A (en) 1978-06-05 1978-06-05 Frame synchronizer

Publications (1)

Publication Number Publication Date
JPS54158811A true JPS54158811A (en) 1979-12-15

Family

ID=13359214

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6793378A Pending JPS54158811A (en) 1978-06-05 1978-06-05 Frame synchronizer

Country Status (1)

Country Link
JP (1) JPS54158811A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159034A (en) * 1982-03-16 1983-09-21 Nec Home Electronics Ltd Synchronization protecting circuit
JPS6042957A (en) * 1983-08-19 1985-03-07 Sanyo Electric Co Ltd Detecting circuit of frame synchronizing signal
JPH03185945A (en) * 1989-12-15 1991-08-13 Japan Radio Co Ltd Bit error correction device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49112518A (en) * 1973-02-24 1974-10-26
JPS501288A (en) * 1973-05-16 1975-01-08
JPS5021609A (en) * 1973-06-25 1975-03-07

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49112518A (en) * 1973-02-24 1974-10-26
JPS501288A (en) * 1973-05-16 1975-01-08
JPS5021609A (en) * 1973-06-25 1975-03-07

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159034A (en) * 1982-03-16 1983-09-21 Nec Home Electronics Ltd Synchronization protecting circuit
JPS6042957A (en) * 1983-08-19 1985-03-07 Sanyo Electric Co Ltd Detecting circuit of frame synchronizing signal
JPH03185945A (en) * 1989-12-15 1991-08-13 Japan Radio Co Ltd Bit error correction device

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