JPS57143935A - Automatic phase controlling circuit - Google Patents

Automatic phase controlling circuit

Info

Publication number
JPS57143935A
JPS57143935A JP56029746A JP2974681A JPS57143935A JP S57143935 A JPS57143935 A JP S57143935A JP 56029746 A JP56029746 A JP 56029746A JP 2974681 A JP2974681 A JP 2974681A JP S57143935 A JPS57143935 A JP S57143935A
Authority
JP
Japan
Prior art keywords
output
phase
switch
frequency
controllable range
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
JP56029746A
Other languages
Japanese (ja)
Inventor
Satoru Shinozaki
Toyoe Yamazaki
Noboru Kusama
Takeo Inoue
Hiroaki Shioda
Tatsuro Shomura
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
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56029746A priority Critical patent/JPS57143935A/en
Publication of JPS57143935A publication Critical patent/JPS57143935A/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
    • H03L7/12—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a scanning signal

Landscapes

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

Abstract

PURPOSE:To perform phase control stably and securely by placing a sweep signal generating circuit in a phase controlling state securely by operating it according to the loop state of a phase controlling circuit, and then by removing an unnecessary influence by disconnecting the sweep signal generating circuit. CONSTITUTION:A detector 11 detects whether the output frequency of a voltage- controlled oscillator 2 is within a phase controllable range or not. Then, an encoding counter 16 counts the output signal of a clock signal source 14 and the count data is converted into an analog signal by D/A conversion 18. This output signal is led to the control input terminal of the oscillator 2 through a switch 17. When the detector 11 generates an output that shows the frequency of the oscillator 2 is not in the phase controllable range, the output of the signal source 14 is supplied to the counter 16 to close a switch 17, and when the detection output shows that the frequency is in the phase controllable range, the switch 17 is opened under the control of a logical circuit 12.
JP56029746A 1981-03-02 1981-03-02 Automatic phase controlling circuit Pending JPS57143935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56029746A JPS57143935A (en) 1981-03-02 1981-03-02 Automatic phase controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56029746A JPS57143935A (en) 1981-03-02 1981-03-02 Automatic phase controlling circuit

Publications (1)

Publication Number Publication Date
JPS57143935A true JPS57143935A (en) 1982-09-06

Family

ID=12284656

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56029746A Pending JPS57143935A (en) 1981-03-02 1981-03-02 Automatic phase controlling circuit

Country Status (1)

Country Link
JP (1) JPS57143935A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008012968A (en) * 2006-07-03 2008-01-24 Kyokuto Kaihatsu Kogyo Co Ltd Cargo handling vehicle
JP2013530641A (en) * 2010-05-28 2013-07-25 マーベル ワールド トレード リミテッド Method and apparatus for drift compensation in PLL

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008012968A (en) * 2006-07-03 2008-01-24 Kyokuto Kaihatsu Kogyo Co Ltd Cargo handling vehicle
JP2013530641A (en) * 2010-05-28 2013-07-25 マーベル ワールド トレード リミテッド Method and apparatus for drift compensation in PLL

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