JPS57150230A - Phase synchronizing circuit - Google Patents

Phase synchronizing circuit

Info

Publication number
JPS57150230A
JPS57150230A JP56036089A JP3608981A JPS57150230A JP S57150230 A JPS57150230 A JP S57150230A JP 56036089 A JP56036089 A JP 56036089A JP 3608981 A JP3608981 A JP 3608981A JP S57150230 A JPS57150230 A JP S57150230A
Authority
JP
Japan
Prior art keywords
output
power supply
electric power
frequency
varied
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
JP56036089A
Other languages
Japanese (ja)
Inventor
Yasuhiko Hosokawa
Shunichiro Onishi
Junichiro Tsukamoto
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56036089A priority Critical patent/JPS57150230A/en
Publication of JPS57150230A publication Critical patent/JPS57150230A/en
Pending 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

Abstract

PURPOSE:To quickly attain resynchronization at the time of recovery of a synchronizing electric power supply, by maintaining the input voltage of a voltage frequency transducer so that output frequency of a frequency divider is not varied, even in the event of instantaneous disconnection of the synchronizing electric power supply. CONSTITUTION:The second filter circuit 7 which obtains an output of a voltage frequency transducer 6 and generates output voltage of time lag of primary order is provided with a time constant which has been selected to a much larger value as compared with an instantaneous disconnection time of an electric power supply. Accordingly, even in case when an output of a phase difference detector 4 has become ''0'' due to instantaneous disconnection of a synchronizing electric power supply 1, an output of an adder 8 is scarcely varied, as a result, not only output frequency of a voltage frequency transducer 2 but also output frequency of a frequency divider 8 are not varied either, therefore, when the synchronizing electric power supply 1 has been recovered, the resynchronization is completed quickly by requiring only the time when an output of the first filter circuit 5 is varied a little.
JP56036089A 1981-03-11 1981-03-11 Phase synchronizing circuit Pending JPS57150230A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56036089A JPS57150230A (en) 1981-03-11 1981-03-11 Phase synchronizing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56036089A JPS57150230A (en) 1981-03-11 1981-03-11 Phase synchronizing circuit

Publications (1)

Publication Number Publication Date
JPS57150230A true JPS57150230A (en) 1982-09-17

Family

ID=12460020

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56036089A Pending JPS57150230A (en) 1981-03-11 1981-03-11 Phase synchronizing circuit

Country Status (1)

Country Link
JP (1) JPS57150230A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03117946U (en) * 1990-03-16 1991-12-05
US5691677A (en) * 1993-07-02 1997-11-25 Italtel Spa Tunable resonator for microwave oscillators and filters
US5764091A (en) * 1995-01-25 1998-06-09 Matsushita Electric Industrial Co., Ltd. Method and system for clock-signal waveform correction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03117946U (en) * 1990-03-16 1991-12-05
US5691677A (en) * 1993-07-02 1997-11-25 Italtel Spa Tunable resonator for microwave oscillators and filters
US5764091A (en) * 1995-01-25 1998-06-09 Matsushita Electric Industrial Co., Ltd. Method and system for clock-signal waveform correction

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