JPS55127735A - Phase synchronizing oscillator - Google Patents

Phase synchronizing oscillator

Info

Publication number
JPS55127735A
JPS55127735A JP3104579A JP3104579A JPS55127735A JP S55127735 A JPS55127735 A JP S55127735A JP 3104579 A JP3104579 A JP 3104579A JP 3104579 A JP3104579 A JP 3104579A JP S55127735 A JPS55127735 A JP S55127735A
Authority
JP
Japan
Prior art keywords
output
oscillator
circuit
signal
phase
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.)
Granted
Application number
JP3104579A
Other languages
Japanese (ja)
Other versions
JPS596532B2 (en
Inventor
Moriyuki Yamamoto
Hiroshi Muto
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 JP54031045A priority Critical patent/JPS596532B2/en
Publication of JPS55127735A publication Critical patent/JPS55127735A/en
Publication of JPS596532B2 publication Critical patent/JPS596532B2/en
Expired 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

Abstract

PURPOSE:To continue to oscillate a voltage control oscillator with the same frequency as input signal break, by cutting off the control output of a control circuit by the output of the detection circuit for signal break and by driving a selection circuit so that the output of one phase comparator may be selected. CONSTITUTION:In the phase synchronizing oscillator used for communication devices, electronic apparatus, etc., phase comparator 1 receives the digital input signal and the output signal of voltage control oscillator 3 to output a signal proportional to their phase difference. Meanwhile, phase comparator 12 receives the output signal of variable delay circuit 11 and the output signal of oscillator 3 to output a signal proportional to their phase difference. By inserting circuit 14 to select one of outputs of comparators 1 and 12, at the input signal break time, the control output of control circuit 13 is cut off by the output of detection circuit 15 for signal break and circuit 14 is so driven that the output of comparator 12 may be selected. As a result, the phase synchronizing oscillator can be made into an IC easily, and oscillator 3 can be continued to oscillate with the same frequency as input signal break.
JP54031045A 1979-03-19 1979-03-19 phase synchronized oscillator Expired JPS596532B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54031045A JPS596532B2 (en) 1979-03-19 1979-03-19 phase synchronized oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54031045A JPS596532B2 (en) 1979-03-19 1979-03-19 phase synchronized oscillator

Publications (2)

Publication Number Publication Date
JPS55127735A true JPS55127735A (en) 1980-10-02
JPS596532B2 JPS596532B2 (en) 1984-02-13

Family

ID=12320502

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54031045A Expired JPS596532B2 (en) 1979-03-19 1979-03-19 phase synchronized oscillator

Country Status (1)

Country Link
JP (1) JPS596532B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57140034A (en) * 1981-02-24 1982-08-30 Nec Corp Phase synchronizing oscillator
US4538120A (en) * 1983-12-19 1985-08-27 Rca Corporation Carrier recovery loop for reception of quadraphase shift keyed signals

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57140034A (en) * 1981-02-24 1982-08-30 Nec Corp Phase synchronizing oscillator
JPS6317250B2 (en) * 1981-02-24 1988-04-13 Nippon Electric Co
US4538120A (en) * 1983-12-19 1985-08-27 Rca Corporation Carrier recovery loop for reception of quadraphase shift keyed signals

Also Published As

Publication number Publication date
JPS596532B2 (en) 1984-02-13

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