JPS5588454A - Fault detector circuit for phase control oscillator - Google Patents

Fault detector circuit for phase control oscillator

Info

Publication number
JPS5588454A
JPS5588454A JP16244578A JP16244578A JPS5588454A JP S5588454 A JPS5588454 A JP S5588454A JP 16244578 A JP16244578 A JP 16244578A JP 16244578 A JP16244578 A JP 16244578A JP S5588454 A JPS5588454 A JP S5588454A
Authority
JP
Japan
Prior art keywords
divider
output
flip
logic level
phase control
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
JP16244578A
Other languages
Japanese (ja)
Other versions
JPS6214148B2 (en
Inventor
Kenji Hayashi
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 JP16244578A priority Critical patent/JPS5588454A/en
Publication of JPS5588454A publication Critical patent/JPS5588454A/en
Publication of JPS6214148B2 publication Critical patent/JPS6214148B2/ja
Granted 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
    • H04L7/0079—Receiver details
    • H04L7/0083—Receiver details taking measures against momentary loss of synchronisation, e.g. inhibiting the synchronisation, using idle words or using redundant clocks

Landscapes

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

Abstract

PURPOSE:To realize most of the fault detection for the phase control oscillator through a simple circuit constitution. CONSTITUTION:In case the phase control system has some fault with the free run of the output frequency, output pulse D of divider 12 entering the trigger terminal of flip-flop 16 features the cyclic phase relation of D and C' to reverse output pulse C' of divider 11. Under such phase relation, logic level ''1'' of C' of divider 11 is written into flip-flop 16 via the rise of output pulse D' of divider 12, and thus the output of OR gate 18 becomes logic level ''1''. In this case, logic level ''1'' is written also into flip-flop 17 in the same way. When the input signal of the phase synchronous oscillator is cut off, the output pulse of divider 11 is fixed to logic level ''1'' or ''0''. And the output of either one of flip-flops 16 and 17 features ''1'', and accordingly the output of gate 18 features also ''1''.
JP16244578A 1978-12-26 1978-12-26 Fault detector circuit for phase control oscillator Granted JPS5588454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16244578A JPS5588454A (en) 1978-12-26 1978-12-26 Fault detector circuit for phase control oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16244578A JPS5588454A (en) 1978-12-26 1978-12-26 Fault detector circuit for phase control oscillator

Publications (2)

Publication Number Publication Date
JPS5588454A true JPS5588454A (en) 1980-07-04
JPS6214148B2 JPS6214148B2 (en) 1987-03-31

Family

ID=15754740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16244578A Granted JPS5588454A (en) 1978-12-26 1978-12-26 Fault detector circuit for phase control oscillator

Country Status (1)

Country Link
JP (1) JPS5588454A (en)

Also Published As

Publication number Publication date
JPS6214148B2 (en) 1987-03-31

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