JPS55110433A - Phase synchronism circuit - Google Patents

Phase synchronism circuit

Info

Publication number
JPS55110433A
JPS55110433A JP1884179A JP1884179A JPS55110433A JP S55110433 A JPS55110433 A JP S55110433A JP 1884179 A JP1884179 A JP 1884179A JP 1884179 A JP1884179 A JP 1884179A JP S55110433 A JPS55110433 A JP S55110433A
Authority
JP
Japan
Prior art keywords
input signal
phase
circuit
synchronism
fed
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
JP1884179A
Other languages
Japanese (ja)
Inventor
Toshio Fujita
Yoichi Matsumoto
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 JP1884179A priority Critical patent/JPS55110433A/en
Publication of JPS55110433A publication Critical patent/JPS55110433A/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

Landscapes

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

Abstract

PURPOSE:To reduce the synchronism pull-in period at re-input of input signal, by performing phase comparison between the output of the voltage controlled oscillator and the input signal, and controlling the oscillation frequency of the voltage controlled oscillator with the low frequency component of the phase error signal. CONSTITUTION:In the phase synchronism circuit which can reduce the synchronism pull-m in period, the input signal from the terminal 1 is fed to the discrimination circuit 2 and the selection circuit 3. This circuit 3 feeds input signal to the phase comparator 4 if the input signal is present and the output of the phase shifter 6 is fed to the phase comparator 4 if absent. Phase comparison is made with the output of the voltage controlled oscillator 7, and harmonics are rejected at LPF 5 from the phase error signal and the result is fed to the oscillator 7 to control the oscillation frequency. Thus, even with long time interruption of input signal, the frequency variation of the oscillator 7 is made very less to reduce the synchronism pull-m in period when the input signal is re-inputted.
JP1884179A 1979-02-20 1979-02-20 Phase synchronism circuit Pending JPS55110433A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1884179A JPS55110433A (en) 1979-02-20 1979-02-20 Phase synchronism circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1884179A JPS55110433A (en) 1979-02-20 1979-02-20 Phase synchronism circuit

Publications (1)

Publication Number Publication Date
JPS55110433A true JPS55110433A (en) 1980-08-25

Family

ID=11982776

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1884179A Pending JPS55110433A (en) 1979-02-20 1979-02-20 Phase synchronism circuit

Country Status (1)

Country Link
JP (1) JPS55110433A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141836A (en) * 1983-01-27 1984-08-14 ジ−メンス・アクチエンゲゼルシヤフト Circuit device for regulating central frequency of oscillator in pll
US6044999A (en) * 1998-01-13 2000-04-04 Toyota Jidosha Kabushiki Kaisha Hollow resin container
US6357617B1 (en) 1998-01-13 2002-03-19 Toyota Jidosha Kabushiki Kaisha Hollow resin container
JP2002234353A (en) * 2001-02-08 2002-08-20 Nifco Inc Synthetic resin-made vent valve

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5293258A (en) * 1976-02-02 1977-08-05 Nec Corp Phase syncronizing oscillator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5293258A (en) * 1976-02-02 1977-08-05 Nec Corp Phase syncronizing oscillator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141836A (en) * 1983-01-27 1984-08-14 ジ−メンス・アクチエンゲゼルシヤフト Circuit device for regulating central frequency of oscillator in pll
US6044999A (en) * 1998-01-13 2000-04-04 Toyota Jidosha Kabushiki Kaisha Hollow resin container
US6357617B1 (en) 1998-01-13 2002-03-19 Toyota Jidosha Kabushiki Kaisha Hollow resin container
JP2002234353A (en) * 2001-02-08 2002-08-20 Nifco Inc Synthetic resin-made vent valve

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