JPS5635552A - Automatic correcting system for frequency of oscillator - Google Patents

Automatic correcting system for frequency of oscillator

Info

Publication number
JPS5635552A
JPS5635552A JP11131879A JP11131879A JPS5635552A JP S5635552 A JPS5635552 A JP S5635552A JP 11131879 A JP11131879 A JP 11131879A JP 11131879 A JP11131879 A JP 11131879A JP S5635552 A JPS5635552 A JP S5635552A
Authority
JP
Japan
Prior art keywords
oscillator
supplied
comparator
corrected
transmission line
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
JP11131879A
Other languages
Japanese (ja)
Inventor
Haruo Tsuda
Takayuki Okino
Toshio Iyota
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP11131879A priority Critical patent/JPS5635552A/en
Publication of JPS5635552A publication Critical patent/JPS5635552A/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
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information

Landscapes

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

Abstract

PURPOSE:To avoid the disturbance given to the control of the oscillator although some fault may arise to the transmission line, by integrating the output of the phase difference detecting means with every fixed frequency and only when the reference frequency signal is supplied in the normal way and thus giving a control to the oscillator. CONSTITUTION:The reference clock signal supplied from the master station and the clock signal of the station to be corrected which is sent from the supplying device 11 of the clock to be corrected are supplied to the phase comparator 13 for the comparison of the phases between those two signals. The output of the comparator 13 is supplied to the inhibiting circuit 14 and then to the averaging circuit 15 only when the information of the transmission line fault is not supplied in case some fault arises to the transmission line. The average value of the output of the comparator 13 is obtained thrugh the circuit 15 and then stored in the memory circuit 16. This stored average value is applied to the oscillator 12 to be corrected, and then a control is given to the oscillation frequency of the oscillator 12 to secure a fixed difference for the phases at the comparator 13.
JP11131879A 1979-08-31 1979-08-31 Automatic correcting system for frequency of oscillator Pending JPS5635552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11131879A JPS5635552A (en) 1979-08-31 1979-08-31 Automatic correcting system for frequency of oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11131879A JPS5635552A (en) 1979-08-31 1979-08-31 Automatic correcting system for frequency of oscillator

Publications (1)

Publication Number Publication Date
JPS5635552A true JPS5635552A (en) 1981-04-08

Family

ID=14558173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11131879A Pending JPS5635552A (en) 1979-08-31 1979-08-31 Automatic correcting system for frequency of oscillator

Country Status (1)

Country Link
JP (1) JPS5635552A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5352163A (en) * 1992-04-21 1994-10-04 Sumitomo Heavy Industries, Ltd. Step-up or reduction gear series using internally meshing planetary gear structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5352163A (en) * 1992-04-21 1994-10-04 Sumitomo Heavy Industries, Ltd. Step-up or reduction gear series using internally meshing planetary gear structure

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