JPS554134A - Phase synchronizer - Google Patents

Phase synchronizer

Info

Publication number
JPS554134A
JPS554134A JP7687878A JP7687878A JPS554134A JP S554134 A JPS554134 A JP S554134A JP 7687878 A JP7687878 A JP 7687878A JP 7687878 A JP7687878 A JP 7687878A JP S554134 A JPS554134 A JP S554134A
Authority
JP
Japan
Prior art keywords
signal
oscillator
synchronous detection
phase
rectification
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
JP7687878A
Other languages
Japanese (ja)
Other versions
JPS6161297B2 (en
Inventor
Mitsuo Isobe
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7687878A priority Critical patent/JPS554134A/en
Publication of JPS554134A publication Critical patent/JPS554134A/en
Publication of JPS6161297B2 publication Critical patent/JPS6161297B2/ja
Granted 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/20—Camera viewing

Abstract

PURPOSE:To realize synchronous detection operation stable extremely against an external noise by detecting a noise, which is in such a direction that rectification is stopped, in an applied signal and by discharging the filter capacitor of a synchronous detection circuit by the output signal. CONSTITUTION:The oscillation frequency of voltage control type oscillator 3 is controlled by a control voltage, its output signal is phase-compared 1 with an amplitude-modulated input signal, and the comparison output is smoothed by LPF2 before being inputted to oscillator 3. Then, the input signal and a signal obtained from the output signal of oscillator 3 through pi/2 phase shifting are both inputted to phase comparator 5 and synchronous detection circuit 6 detects the phase synchronism of oscillator 3 through the rectification opposite to the demodulation polarity of comparator. A noise in such a direction that the rectification will be stopped is detected 7 among the signal applied to circuit 6 and the filter capacitor of circuit 6 is discharged 8 by the detection signal, thereby attaining synchronous detection stable extremely against an external noise.
JP7687878A 1978-06-23 1978-06-23 Phase synchronizer Granted JPS554134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7687878A JPS554134A (en) 1978-06-23 1978-06-23 Phase synchronizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7687878A JPS554134A (en) 1978-06-23 1978-06-23 Phase synchronizer

Publications (2)

Publication Number Publication Date
JPS554134A true JPS554134A (en) 1980-01-12
JPS6161297B2 JPS6161297B2 (en) 1986-12-25

Family

ID=13617880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7687878A Granted JPS554134A (en) 1978-06-23 1978-06-23 Phase synchronizer

Country Status (1)

Country Link
JP (1) JPS554134A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0647031A1 (en) * 1993-10-05 1995-04-05 Eta SA Fabriques d'Ebauches Circuit for correcting phase-shift and amplitudes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0647031A1 (en) * 1993-10-05 1995-04-05 Eta SA Fabriques d'Ebauches Circuit for correcting phase-shift and amplitudes
FR2711027A1 (en) * 1993-10-05 1995-04-14 Ebauchesfabrik Eta Ag Phase shift and amplitude correction circuit.
US5635876A (en) * 1993-10-05 1997-06-03 Eta Sa Fabriques D'ebauches Phase difference and amplitude correction circuit

Also Published As

Publication number Publication date
JPS6161297B2 (en) 1986-12-25

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