JPS57141136A - Phase synchronous tracking device - Google Patents

Phase synchronous tracking device

Info

Publication number
JPS57141136A
JPS57141136A JP56026309A JP2630981A JPS57141136A JP S57141136 A JPS57141136 A JP S57141136A JP 56026309 A JP56026309 A JP 56026309A JP 2630981 A JP2630981 A JP 2630981A JP S57141136 A JPS57141136 A JP S57141136A
Authority
JP
Japan
Prior art keywords
output
voltage
level
circuit
oscillator
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
JP56026309A
Other languages
Japanese (ja)
Inventor
Takao Sakayori
Nobuyoshi Nishiyama
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 JP56026309A priority Critical patent/JPS57141136A/en
Publication of JPS57141136A publication Critical patent/JPS57141136A/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 prevent malfunction by inhibiting the phase synchronization of a noise and a spurious component in an input signal, by providing a circuit which discriminates whether synchronization with the input signal is achieved correctly or not. CONSTITUTION:In addition to the 1st coupler 3a, the 2nd coupler 3b is provided on the output side of a voltage-controlled oscillator 2, and part of its output is applied to an electronic tuning band-pass filter circuir 4. The passing-band frequency of this filter circuit 4 is controlled by an external frequency control signal which corresponds to an input reference signal, and its output is compared by a level comparing and discriminating circuit 5. Then when an input signal level 8 and the output level of the filter circuit 4 are not coincident with each other, a sweep voltage generator 6 is operated to apply a voltage to an oscillator 2 through an adder 7. When the output frequency of the oscillator 2 varies and reaches the passing band frequency of the filter circuit 4, the level of the discriminating circuit 5 becomes coincident and the operation of the voltage generator 6 is stopped to hold the voltage when the generator is stopped.
JP56026309A 1981-02-25 1981-02-25 Phase synchronous tracking device Pending JPS57141136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56026309A JPS57141136A (en) 1981-02-25 1981-02-25 Phase synchronous tracking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56026309A JPS57141136A (en) 1981-02-25 1981-02-25 Phase synchronous tracking device

Publications (1)

Publication Number Publication Date
JPS57141136A true JPS57141136A (en) 1982-09-01

Family

ID=12189766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56026309A Pending JPS57141136A (en) 1981-02-25 1981-02-25 Phase synchronous tracking device

Country Status (1)

Country Link
JP (1) JPS57141136A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0479611A (en) * 1990-07-20 1992-03-13 Mitsubishi Electric Corp Phase locked loop circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0479611A (en) * 1990-07-20 1992-03-13 Mitsubishi Electric Corp Phase locked loop circuit

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