JPS5478959A - Phase fllowing oscillator - Google Patents

Phase fllowing oscillator

Info

Publication number
JPS5478959A
JPS5478959A JP14611277A JP14611277A JPS5478959A JP S5478959 A JPS5478959 A JP S5478959A JP 14611277 A JP14611277 A JP 14611277A JP 14611277 A JP14611277 A JP 14611277A JP S5478959 A JPS5478959 A JP S5478959A
Authority
JP
Japan
Prior art keywords
signal
phase
input signal
input
outputted
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
JP14611277A
Other languages
Japanese (ja)
Inventor
Kazuyuki Takeshita
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP14611277A priority Critical patent/JPS5478959A/en
Publication of JPS5478959A publication Critical patent/JPS5478959A/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
    • H03L7/14—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted

Landscapes

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

Abstract

PURPOSE:To establish the phase following oscillator responding to faster to the input in absence, by processing and comparing the signal shaping the input signal with the oscillator output almost the same frequency as the input signal in phase synchronism to external reference signal with the analog multiplier. CONSTITUTION:The input signal from the terminal 1 causes the sinusoidal wave 11 constant for amplitude with the shape circuit 10. The output signal 13 of the oscillator 12 in phase synchronism with external reference signal and oscillating the almost same frequency and amplitude as the input signal, and the signal 11 are given to the track-and-hold circuit 19 via the analog multiplier 14 and LPF 16. If the input signal is continuous, the absence signal 18 is not outputted from the input detector 17, then the output normalized for T & H unit 19 is compared for the level with the signal 13 with the comparator 20, and the pulse train 21 of the pulse width according to the phase difference is outputted and the signal 23 phase- locked to the input signal via one shot circuit 22 is outputted. When the input signal is off, the signal 18 is outputted with the detector 17, and the output is kept constant with the track-and-hold unit 19 during disconnection, allowing to hold the phase at a constant value.
JP14611277A 1977-12-07 1977-12-07 Phase fllowing oscillator Pending JPS5478959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14611277A JPS5478959A (en) 1977-12-07 1977-12-07 Phase fllowing oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14611277A JPS5478959A (en) 1977-12-07 1977-12-07 Phase fllowing oscillator

Publications (1)

Publication Number Publication Date
JPS5478959A true JPS5478959A (en) 1979-06-23

Family

ID=15400415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14611277A Pending JPS5478959A (en) 1977-12-07 1977-12-07 Phase fllowing oscillator

Country Status (1)

Country Link
JP (1) JPS5478959A (en)

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