JPS5597737A - Phase-synchronous oscillator - Google Patents

Phase-synchronous oscillator

Info

Publication number
JPS5597737A
JPS5597737A JP513979A JP513979A JPS5597737A JP S5597737 A JPS5597737 A JP S5597737A JP 513979 A JP513979 A JP 513979A JP 513979 A JP513979 A JP 513979A JP S5597737 A JPS5597737 A JP S5597737A
Authority
JP
Japan
Prior art keywords
phase
output
highest
phase comparator
accurately
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
JP513979A
Other languages
Japanese (ja)
Other versions
JPS6340048B2 (en
Inventor
Kokichi Ichijo
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 JP513979A priority Critical patent/JPS5597737A/en
Publication of JPS5597737A publication Critical patent/JPS5597737A/en
Publication of JPS6340048B2 publication Critical patent/JPS6340048B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/095—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using a lock detector

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To detect a step-out accurately by making use of the inversion of the output of a phase comparator when exceeding a set range. CONSTITUTION:If an input clock signal would not be regenerated accurately by a phase-synchronous detection system, asynchronizing output signal 104 is generated by oscillator 3. At this time, the output of phase comparator 2 increases with constant gradient corresponding to a shift in phase and then falls suddenly down to the lowest value V<-> on reaching the highest value V<+> to form a saw-tooth waveform. Comparators 5 and 6 detecting the highest and lowest values V<+> and V<-> generate detection signals (b) and (d) respectively, by which delay switching curcuits 6 and 8 of a monostable multivibrator operate to generate gate pulse (c) and (e). In case that a step-out with sudden transition from V<+> to V<-> is caused, gate pulses (c) and (e) are AND-ed 11 to give an alarm.
JP513979A 1979-01-19 1979-01-19 Phase-synchronous oscillator Granted JPS5597737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP513979A JPS5597737A (en) 1979-01-19 1979-01-19 Phase-synchronous oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP513979A JPS5597737A (en) 1979-01-19 1979-01-19 Phase-synchronous oscillator

Publications (2)

Publication Number Publication Date
JPS5597737A true JPS5597737A (en) 1980-07-25
JPS6340048B2 JPS6340048B2 (en) 1988-08-09

Family

ID=11602969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP513979A Granted JPS5597737A (en) 1979-01-19 1979-01-19 Phase-synchronous oscillator

Country Status (1)

Country Link
JP (1) JPS5597737A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219026A (en) * 1983-05-27 1984-12-10 Fujitsu Ltd Asynchronism detecting system
JPS61177187A (en) * 1985-01-29 1986-08-08 Konishiroku Photo Ind Co Ltd Pll synchronous monitoring apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52107755A (en) * 1976-03-08 1977-09-09 Nec Corp Nonsynchronous state detection circuit of phase synchronous oscillator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52107755A (en) * 1976-03-08 1977-09-09 Nec Corp Nonsynchronous state detection circuit of phase synchronous oscillator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219026A (en) * 1983-05-27 1984-12-10 Fujitsu Ltd Asynchronism detecting system
JPS61177187A (en) * 1985-01-29 1986-08-08 Konishiroku Photo Ind Co Ltd Pll synchronous monitoring apparatus

Also Published As

Publication number Publication date
JPS6340048B2 (en) 1988-08-09

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