JPS57183132A - Phase synchromizing circuit - Google Patents

Phase synchromizing circuit

Info

Publication number
JPS57183132A
JPS57183132A JP56069552A JP6955281A JPS57183132A JP S57183132 A JPS57183132 A JP S57183132A JP 56069552 A JP56069552 A JP 56069552A JP 6955281 A JP6955281 A JP 6955281A JP S57183132 A JPS57183132 A JP S57183132A
Authority
JP
Japan
Prior art keywords
phase
power source
phase difference
synchronous power
filter
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
JP56069552A
Other languages
Japanese (ja)
Inventor
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 JP56069552A priority Critical patent/JPS57183132A/en
Publication of JPS57183132A publication Critical patent/JPS57183132A/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
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • 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
    • H03L7/087—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using at least two phase detectors or a frequency and phase detector in the loop

Landscapes

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

Abstract

PURPOSE:To speed resynchronization after a synchronous power source is turned off, by constituting two phase synchronous loops by using two filters differing in time constant for the same voltage-controlled oscillator. CONSTITUTION:A phase synchronizing circuit which has two loops consists of phase difference detectors 2 and 21, filter circuits 3 and 31, an adder 7, a V/F converter 4, and a frequency divider 6. The filter 31 has a small time constant for the filter 3. The output of a synchronous power source 1 is applied to the phase difference detectors 2 and 21 and when synchronization is attained, the 1st output 8 of the frequency divider 6 is applied to the phase difference detector 2 to obtain a constant phase difference from the synchronous power source 1 while the 2nd output 9 is applied to the phase difference detector 21 to obtain phase coincidence with the synchronous power source 1. Since the time constant of the filter 31 is small, resynchronization is speeded if an out- of-synchronism state is caused by the instantaneous break of the synchronous power source.
JP56069552A 1981-05-06 1981-05-06 Phase synchromizing circuit Pending JPS57183132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56069552A JPS57183132A (en) 1981-05-06 1981-05-06 Phase synchromizing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56069552A JPS57183132A (en) 1981-05-06 1981-05-06 Phase synchromizing circuit

Publications (1)

Publication Number Publication Date
JPS57183132A true JPS57183132A (en) 1982-11-11

Family

ID=13406001

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56069552A Pending JPS57183132A (en) 1981-05-06 1981-05-06 Phase synchromizing circuit

Country Status (1)

Country Link
JP (1) JPS57183132A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5989037A (en) * 1982-11-12 1984-05-23 Victor Co Of Japan Ltd Phase locked loop circuit
JPH07264062A (en) * 1991-10-30 1995-10-13 Internatl Business Mach Corp <Ibm> Phase-locked loop circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5989037A (en) * 1982-11-12 1984-05-23 Victor Co Of Japan Ltd Phase locked loop circuit
JPH07264062A (en) * 1991-10-30 1995-10-13 Internatl Business Mach Corp <Ibm> Phase-locked loop circuit

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