JPS57176845A - Phase synchronizing oscillator - Google Patents

Phase synchronizing oscillator

Info

Publication number
JPS57176845A
JPS57176845A JP56062907A JP6290781A JPS57176845A JP S57176845 A JPS57176845 A JP S57176845A JP 56062907 A JP56062907 A JP 56062907A JP 6290781 A JP6290781 A JP 6290781A JP S57176845 A JPS57176845 A JP S57176845A
Authority
JP
Japan
Prior art keywords
oscillator
output
voltage
input signal
signal
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
JP56062907A
Other languages
Japanese (ja)
Inventor
Hitoshi Hino
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 JP56062907A priority Critical patent/JPS57176845A/en
Publication of JPS57176845A publication Critical patent/JPS57176845A/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
    • H03L7/146—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted by using digital means for generating the oscillator control signal

Landscapes

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

Abstract

PURPOSE:To obtain an output signal corresponding to an input signal even when there is no input signal by providing a device that switches and selects an output of a circuit that stores the controlled voltage of the controlled voltage oscillator of a phase synchronizing oscillator and an output of a loop filter. CONSTITUTION:An phase comparator 1 compares phases of an input signal and output signal of a voltage controlling oscillator 3 with each other, and controls the oscillator 3 by the control voltage of the output passed through a loop filter 2 and a switch 6. This control voltage is converted to a digital signal by an A/D converter at optional timing from a control circuit 5d and stored in a memory 5b. When there is no input signal, the digital signal stored in the memory 5b is converted to analog voltage by the A/D converter 5c and the voltage is given to the oscillator 3 by changing over the switch 6. By this way, output signals corresponding to input signals at any timing can be obtained.
JP56062907A 1981-04-23 1981-04-23 Phase synchronizing oscillator Pending JPS57176845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56062907A JPS57176845A (en) 1981-04-23 1981-04-23 Phase synchronizing oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56062907A JPS57176845A (en) 1981-04-23 1981-04-23 Phase synchronizing oscillator

Publications (1)

Publication Number Publication Date
JPS57176845A true JPS57176845A (en) 1982-10-30

Family

ID=13213788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56062907A Pending JPS57176845A (en) 1981-04-23 1981-04-23 Phase synchronizing oscillator

Country Status (1)

Country Link
JP (1) JPS57176845A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6336613A (en) * 1986-07-31 1988-02-17 Hitachi Ltd Phase locked loop device
JPH03247018A (en) * 1990-02-23 1991-11-05 Japan Radio Co Ltd Local oscillator circuit
JP2010273299A (en) * 2009-05-25 2010-12-02 Furuno Electric Co Ltd Reference frequency-generating apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6336613A (en) * 1986-07-31 1988-02-17 Hitachi Ltd Phase locked loop device
JPH03247018A (en) * 1990-02-23 1991-11-05 Japan Radio Co Ltd Local oscillator circuit
JP2010273299A (en) * 2009-05-25 2010-12-02 Furuno Electric Co Ltd Reference frequency-generating apparatus

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