JPS57212842A - Pulse stuff synchronizing device - Google Patents

Pulse stuff synchronizing device

Info

Publication number
JPS57212842A
JPS57212842A JP9853681A JP9853681A JPS57212842A JP S57212842 A JPS57212842 A JP S57212842A JP 9853681 A JP9853681 A JP 9853681A JP 9853681 A JP9853681 A JP 9853681A JP S57212842 A JPS57212842 A JP S57212842A
Authority
JP
Japan
Prior art keywords
random
phase comparison
phase
jitter
counter
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
JP9853681A
Other languages
Japanese (ja)
Other versions
JPH0115182B2 (en
Inventor
Yoshinori Rokugo
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 JP9853681A priority Critical patent/JPS57212842A/en
Publication of JPS57212842A publication Critical patent/JPS57212842A/en
Publication of JPH0115182B2 publication Critical patent/JPH0115182B2/ja
Granted 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
    • H04J3/07—Synchronising arrangements using pulse stuffing for systems with different or fluctuating information rates or bit rates
    • H04J3/073—Bit stuffing, e.g. PDH

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

PURPOSE:To prevent the generation of a waiting time jitter and sampling jitter in an infralow frequency, by switching a phase comparison position at random with a random counter. CONSTITUTION:A plurality of signals for phase comparison from a write counter 2 and a readout counter 3 are picked up at each phase and given to selectors 19 and 20. Further, a random number generator 18 renewing its value once at each one frame switches signal pairs for phase comparison picked up from the selectors 19 and 20 at random per one frame and prevents the periodity appeared at the phase comparison. Thus, the relation of order of number theory can not be caused to a phase comparator 4 and stuffing, allowing to prevent the standing waves in low frequency for the jitter waveform of waiting time.
JP9853681A 1981-06-25 1981-06-25 Pulse stuff synchronizing device Granted JPS57212842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9853681A JPS57212842A (en) 1981-06-25 1981-06-25 Pulse stuff synchronizing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9853681A JPS57212842A (en) 1981-06-25 1981-06-25 Pulse stuff synchronizing device

Publications (2)

Publication Number Publication Date
JPS57212842A true JPS57212842A (en) 1982-12-27
JPH0115182B2 JPH0115182B2 (en) 1989-03-16

Family

ID=14222398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9853681A Granted JPS57212842A (en) 1981-06-25 1981-06-25 Pulse stuff synchronizing device

Country Status (1)

Country Link
JP (1) JPS57212842A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS642432A (en) * 1987-05-22 1989-01-06 American Teleph & Telegr Co <Att> Digital frame synchronization device and synchronization method
EP0412575A2 (en) * 1989-08-09 1991-02-13 Philips Patentverwaltung GmbH Stuffing decision circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5977981B2 (en) 2012-03-30 2016-08-24 株式会社日立製作所 Ultrasonic probe, ultrasonic probe cable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS642432A (en) * 1987-05-22 1989-01-06 American Teleph & Telegr Co <Att> Digital frame synchronization device and synchronization method
EP0412575A2 (en) * 1989-08-09 1991-02-13 Philips Patentverwaltung GmbH Stuffing decision circuit

Also Published As

Publication number Publication date
JPH0115182B2 (en) 1989-03-16

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