JPS6465944A - Multiframe synchronization circuit - Google Patents

Multiframe synchronization circuit

Info

Publication number
JPS6465944A
JPS6465944A JP62221399A JP22139987A JPS6465944A JP S6465944 A JPS6465944 A JP S6465944A JP 62221399 A JP62221399 A JP 62221399A JP 22139987 A JP22139987 A JP 22139987A JP S6465944 A JPS6465944 A JP S6465944A
Authority
JP
Japan
Prior art keywords
multiframe
synchronism
synchronizing pulse
frame
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
JP62221399A
Other languages
Japanese (ja)
Other versions
JP2535947B2 (en
Inventor
Shigeo Takahara
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
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 filed Critical NEC Corp
Priority to JP62221399A priority Critical patent/JP2535947B2/en
Publication of JPS6465944A publication Critical patent/JPS6465944A/en
Application granted granted Critical
Publication of JP2535947B2 publication Critical patent/JP2535947B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To shorten the synchronism reset time of a multiframe by shifting a multiframe synchronizing pulse backward by one frame. CONSTITUTION:The multiframe synchronizing pulse 4-2 generated by a multiframe counter circuit 3, and a multiframe bit expressed by the M of data 4-1 inputted from an input terminal 9 are compared by a multiframe synchronism detection circuit 5. When both do not coincide with each other and in addition synchronism protection is off, one frame period clock 4-4 is prohibited by one period portion by the output pulse 4-3 of a NOR circuit 16 to be inputted to an OR 8, and a toothless clock 4-5 is generated. Thus, the multiframe synchronizing pulse 4-2 is shifted backward by one frame. When synchronism is attained after repeating it, the position of the multiframe synchronizing pulse 4-2 is fixed at this state, and the output of out-of-synchronism information 4-6 from a terminal 12 is stopped.
JP62221399A 1987-09-04 1987-09-04 Multi-frame synchronization circuit Expired - Lifetime JP2535947B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62221399A JP2535947B2 (en) 1987-09-04 1987-09-04 Multi-frame synchronization circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62221399A JP2535947B2 (en) 1987-09-04 1987-09-04 Multi-frame synchronization circuit

Publications (2)

Publication Number Publication Date
JPS6465944A true JPS6465944A (en) 1989-03-13
JP2535947B2 JP2535947B2 (en) 1996-09-18

Family

ID=16766147

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62221399A Expired - Lifetime JP2535947B2 (en) 1987-09-04 1987-09-04 Multi-frame synchronization circuit

Country Status (1)

Country Link
JP (1) JP2535947B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5746292A (en) * 1994-10-28 1998-05-05 Hino Jidosha Kogyo Kabushiki Kaisha Disk brake device for reducing brake noise
US5887686A (en) * 1994-09-02 1999-03-30 Hino Jidosha Kogyo Kabushiki Kaisha Drum brake having a vibration suppression sytem

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5887686A (en) * 1994-09-02 1999-03-30 Hino Jidosha Kogyo Kabushiki Kaisha Drum brake having a vibration suppression sytem
US5746292A (en) * 1994-10-28 1998-05-05 Hino Jidosha Kogyo Kabushiki Kaisha Disk brake device for reducing brake noise

Also Published As

Publication number Publication date
JP2535947B2 (en) 1996-09-18

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