JPS57140034A - Phase synchronizing oscillator - Google Patents

Phase synchronizing oscillator

Info

Publication number
JPS57140034A
JPS57140034A JP56024911A JP2491181A JPS57140034A JP S57140034 A JPS57140034 A JP S57140034A JP 56024911 A JP56024911 A JP 56024911A JP 2491181 A JP2491181 A JP 2491181A JP S57140034 A JPS57140034 A JP S57140034A
Authority
JP
Japan
Prior art keywords
output
signal
frequency
frequency divider
phase
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
JP56024911A
Other languages
Japanese (ja)
Other versions
JPS6317250B2 (en
Inventor
Yoshitaka Kato
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 JP56024911A priority Critical patent/JPS57140034A/en
Publication of JPS57140034A publication Critical patent/JPS57140034A/en
Publication of JPS6317250B2 publication Critical patent/JPS6317250B2/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
    • H03L7/14—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted
    • H03L7/143—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted by switching the reference signal of the phase-locked loop
    • H03L7/145—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted by switching the reference signal of the phase-locked loop the switched reference signal being derived from the controlled oscillator output signal

Abstract

PURPOSE:To stably output the preceding oscillating frequency even for a long time interruption of a reference signal, by inputting an output of a frequency divider giving a signal with the closest phase to a phase comparator, to a frequency divider output frequency-dividing the reference signal at the interruption of the reference signal. CONSTITUTION:When a reference signal is inputted to a terminal 13, this signal is frequency-divided by N at the 1st frequency divider 14 and given to a phase comparator 21 via a selecting circuit 20 and the signal is compared in terms of phase with the output of the 2nd frequency divider frequency-dividing the output of a voltage controlled oscillator 16 by m at the comparator 21, the output controls the oscillator 16 via an LPF22 to output a signal synchronizing in terms of phase with the reference signal. The output of the oscillator 16 is frequency-divided by m at the 3rd frequency divider, and the frequency divider 17 receives a control signal from the frequency divider 14 via a suppression circuit 19 and outputs a frequency dividing signal of phase closest to that of the output signal of the frequency divider 14. When the reference signal is interrupted, this is detected at a signal interruption detecting circuit 15 to control a circuit 20 and the output of the frequency divider 17 is selected to be given to the comparator 21, and the output of the comparator 21 controls the oscillator 16.
JP56024911A 1981-02-24 1981-02-24 Phase synchronizing oscillator Granted JPS57140034A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56024911A JPS57140034A (en) 1981-02-24 1981-02-24 Phase synchronizing oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56024911A JPS57140034A (en) 1981-02-24 1981-02-24 Phase synchronizing oscillator

Publications (2)

Publication Number Publication Date
JPS57140034A true JPS57140034A (en) 1982-08-30
JPS6317250B2 JPS6317250B2 (en) 1988-04-13

Family

ID=12151352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56024911A Granted JPS57140034A (en) 1981-02-24 1981-02-24 Phase synchronizing oscillator

Country Status (1)

Country Link
JP (1) JPS57140034A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660080A (en) * 1985-12-24 1987-04-21 Rca Corporation Synchronization circuit responsive to time-multiplexed signals
JPH01175321A (en) * 1987-12-28 1989-07-11 Sony Corp Pll circuit
JPH02217018A (en) * 1989-02-17 1990-08-29 Nec Corp Phase locked loop oscillator
WO1997023049A1 (en) * 1995-12-20 1997-06-26 Italtel S.P.A. Procedure and circuit for holding lock state in a digital pll
US7323965B2 (en) 2002-04-24 2008-01-29 Nec Schott Components Corporation Thermal fuse using thermosensitive material
US7323966B2 (en) 2003-10-28 2008-01-29 Nec Schott Components Corporation Thermal pellet incorporated thermal fuse and method of producing thermal pellet
US7330098B2 (en) 2005-03-17 2008-02-12 Nec Schott Components Corporation Thermal fuse employing a thermosensitive pellet
US7362208B2 (en) 2004-09-17 2008-04-22 Nec Schott Components Corporation Thermal pellet type thermal fuse
US7843307B2 (en) 2007-10-05 2010-11-30 Nec Schott Components Corporation Thermal fuse employing thermosensitive pellet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0742413A (en) * 1993-07-27 1995-02-10 Kajima Corp Funerary casket

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5289053A (en) * 1976-01-16 1977-07-26 Control Data Corp Phase synchronizing circuit
JPS5293258A (en) * 1976-02-02 1977-08-05 Nec Corp Phase syncronizing oscillator
JPS55127735A (en) * 1979-03-19 1980-10-02 Nec Corp Phase synchronizing oscillator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5289053A (en) * 1976-01-16 1977-07-26 Control Data Corp Phase synchronizing circuit
JPS5293258A (en) * 1976-02-02 1977-08-05 Nec Corp Phase syncronizing oscillator
JPS55127735A (en) * 1979-03-19 1980-10-02 Nec Corp Phase synchronizing oscillator

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660080A (en) * 1985-12-24 1987-04-21 Rca Corporation Synchronization circuit responsive to time-multiplexed signals
JPH01175321A (en) * 1987-12-28 1989-07-11 Sony Corp Pll circuit
JPH02217018A (en) * 1989-02-17 1990-08-29 Nec Corp Phase locked loop oscillator
WO1997023049A1 (en) * 1995-12-20 1997-06-26 Italtel S.P.A. Procedure and circuit for holding lock state in a digital pll
US7323965B2 (en) 2002-04-24 2008-01-29 Nec Schott Components Corporation Thermal fuse using thermosensitive material
US7323966B2 (en) 2003-10-28 2008-01-29 Nec Schott Components Corporation Thermal pellet incorporated thermal fuse and method of producing thermal pellet
US7362208B2 (en) 2004-09-17 2008-04-22 Nec Schott Components Corporation Thermal pellet type thermal fuse
US7330098B2 (en) 2005-03-17 2008-02-12 Nec Schott Components Corporation Thermal fuse employing a thermosensitive pellet
US7843307B2 (en) 2007-10-05 2010-11-30 Nec Schott Components Corporation Thermal fuse employing thermosensitive pellet

Also Published As

Publication number Publication date
JPS6317250B2 (en) 1988-04-13

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