ES484438A1 - Perfeccionamientos en demoduladores de senal de fm con dete-ccion de defectos - Google Patents

Perfeccionamientos en demoduladores de senal de fm con dete-ccion de defectos

Info

Publication number
ES484438A1
ES484438A1 ES484438A ES484438A ES484438A1 ES 484438 A1 ES484438 A1 ES 484438A1 ES 484438 A ES484438 A ES 484438A ES 484438 A ES484438 A ES 484438A ES 484438 A1 ES484438 A1 ES 484438A1
Authority
ES
Spain
Prior art keywords
defect
signal
phase
video
signals
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.)
Expired
Application number
ES484438A
Other languages
English (en)
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Publication of ES484438A1 publication Critical patent/ES484438A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/24—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits
    • H03D3/241—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
    • G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/87—Regeneration of colour television signals
    • H04N9/88—Signal drop-out compensation
    • H04N9/882—Signal drop-out compensation the signal being a composite colour television signal

Abstract

Perfeccionamientos en demoduladores de señal de FM con detección de defectos, del tipo que se disponen para un sistema de traducción de una señal que comprende una fuente de ondas portadoras, cuya frecuencia instantánea está sujeta a variación en una gama de desviación dada, estando sujeta la fuente aleatoriamente a ocasiones de funcionamiento defectuoso durante las cuales la frecuencia instantánea aparece de las ondas portadoras se desvía de la gama de desviación dada, caracterizados por un bucle bloqueado en fase que tiene un detector de fase y un oscilador controlado por voltaje, cuyo detector de fase responde a primeras señales correspondientes a las ondas portadoras y a las señales de salida del oscilador para proporcionar señales de salida del detector de fase para alterar la frecuencia de las señales de salida del oscilador en la dirección necesaria para mantener la fase relativa entre las primeras señales y las señales de salida del oscilador dentro de una cierta gama de valores, ymedios de detección de defectos que responden a las primeras señales y a las señales de salida del oscilador para proporcionar una señal de indicación de defecto cuando la fase relativa entre las primeras señales y las señales de salida del oscilador se desvía de una gama dada de valores, correspondiendo la desviación a una aparición de las ocasiones de funcionamiento defectuoso, y para proporcionar una señal de nivel de referencia cuando la fase relativa entre las primeras señales de salida del oscilador está dentro de la gama de valores dada.
ES484438A 1978-10-02 1979-09-25 Perfeccionamientos en demoduladores de senal de fm con dete-ccion de defectos Expired ES484438A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/948,013 US4203134A (en) 1978-10-02 1978-10-02 FM Signal demodulator with defect detection

Publications (1)

Publication Number Publication Date
ES484438A1 true ES484438A1 (es) 1980-04-16

Family

ID=25487124

Family Applications (1)

Application Number Title Priority Date Filing Date
ES484438A Expired ES484438A1 (es) 1978-10-02 1979-09-25 Perfeccionamientos en demoduladores de senal de fm con dete-ccion de defectos

Country Status (19)

Country Link
US (1) US4203134A (es)
JP (1) JPS5555450A (es)
AT (1) AT384333B (es)
AU (1) AU531092B2 (es)
CA (1) CA1129094A (es)
DE (1) DE2939402C2 (es)
EG (1) EG13936A (es)
ES (1) ES484438A1 (es)
FI (1) FI68333C (es)
FR (1) FR2438375B1 (es)
GB (1) GB2032738B (es)
HK (1) HK7983A (es)
IT (1) IT1123352B (es)
MY (1) MY8400054A (es)
NL (1) NL7907301A (es)
PL (1) PL133032B1 (es)
SE (1) SE435885B (es)
SG (1) SG61682G (es)
SU (1) SU1033016A3 (es)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286283A (en) * 1979-12-20 1981-08-25 Rca Corporation Transcoder
JPS5715207A (en) * 1980-07-03 1982-01-26 Victor Co Of Japan Ltd Frequency-characteristic correction device of rotary information recording medium reproducing device
US4376289A (en) * 1980-10-27 1983-03-08 Rca Corporation Self-enabling dropout corrector
US4327432A (en) * 1980-11-07 1982-04-27 Rca Corporation Video disc player with RFI reduction circuit
US4327431A (en) * 1980-11-07 1982-04-27 Rca Corporation Video disc player with variable offset RFI reduction circuit
US4361881A (en) * 1980-11-21 1982-11-30 Rca Corporation Video disc player with RFI reduction circuit including signal subtraction
US4385374A (en) * 1980-11-21 1983-05-24 Rca Corporation Video disc player with RFI reduction circuit including an AGC amplifier and dual function peak detector
US4364119A (en) * 1980-11-21 1982-12-14 Rca Corporation Video disc player with RFI reduction circuit including a signal product generator
US4353093A (en) * 1981-05-11 1982-10-05 Rca Corporation Impulse noise reduction system for TV receivers
US4418363A (en) * 1981-06-24 1983-11-29 Rca Corporation Video disc player with RFI reduction circuit including sync tip clamp
JPS5834031U (ja) * 1981-08-30 1983-03-05 加藤　一郎 気圧計の指針
US4481616A (en) * 1981-09-30 1984-11-06 Rca Corporation Scanning capacitance microscope
US4476498A (en) * 1982-02-05 1984-10-09 Rca Corporation Deviation detector for FM video recording system
US4462048A (en) * 1982-02-11 1984-07-24 Rca Corporation Noise reduction circuitry for audio signals
US4514763A (en) * 1982-10-29 1985-04-30 Rca Corporation Sound signal and impulse noise detector for television receivers
JPS6087469A (ja) * 1983-10-19 1985-05-17 Hitachi Ltd ドロップアウト補償装置
JPS6077114U (ja) * 1983-11-01 1985-05-29 パイオニア株式会社 Ｆｍ信号復調装置
JPS61970A (ja) * 1984-06-13 1986-01-06 Matsushita Electric Ind Co Ltd 異常信号検出装置
DE3613473A1 (de) * 1986-04-22 1987-10-29 Thomson Brandt Gmbh Videorecorder mit verbesserter tonwiedergabe
US4680651A (en) * 1986-08-19 1987-07-14 Eastman Kodak Company Timing signal dropout compensation circuit
DE3702856A1 (de) * 1987-01-31 1988-08-11 Philips Patentverwaltung Schaltungsanordnung zur detektion der ueberschreitung eines vorgegebenen frequenzhubbereiches
US4754467A (en) * 1987-07-01 1988-06-28 Motorola, Inc. Digital signal detection with signal buffering and message insertion
US4906942A (en) * 1987-12-17 1990-03-06 Mitsubishi Denki Kabushiki Kaisha Frequency demodulator with reversal phenomenon compensation
JPH01296704A (ja) * 1988-05-24 1989-11-30 Matsushita Electric Ind Co Ltd Ｆｍ復調装置
US4943858A (en) * 1989-02-23 1990-07-24 Matsushita Electric Industrial Co., Ltd. TV signal recording and reproducing apparatus employing a digital interface and including signal drop-out compensation
DE3920004A1 (de) * 1989-06-20 1991-01-03 Philips Patentverwaltung Verfahren und anordnung zur rauschunterdrueckung eines digitalen signals
DE19757315A1 (de) * 1997-12-22 1999-06-24 Thomson Brandt Gmbh Standby-Signal für FM-Demodulator
DE19830130B4 (de) * 1998-07-06 2007-01-18 Robert Bosch Gmbh Schaltungsanordnung für eine PLL-Schaltung (Phase-locked-Loop) zur Frequenzvervielfachung
TWI756730B (zh) * 2020-07-03 2022-03-01 立積電子股份有限公司 調頻解調變裝置及調頻解調變裝置的控制方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3582809A (en) * 1968-09-06 1971-06-01 Signetics Corp Phased locked loop with voltage controlled oscillator
US3842194A (en) * 1971-03-22 1974-10-15 Rca Corp Information records and recording/playback systems therefor
JPS5550640B2 (es) * 1973-03-09 1980-12-19
US4001496A (en) * 1974-06-06 1977-01-04 Rca Corporation Defect detection and compensation apparatus for use in an fm signal translating system
AR207776A1 (es) * 1974-06-06 1976-10-29 Rca Corp Disposicion para reproducir una grabacion de imagenes de color sucesivas
US3967311A (en) * 1974-11-12 1976-06-29 Rca Corporation Velocity correction for video discs
JPS5440331B2 (es) * 1975-03-05 1979-12-03
GB1536851A (en) * 1975-03-10 1978-12-20 Rca Corp Video carrier wave defect detection and compensation
NL7503049A (nl) * 1975-03-14 1976-09-16 Philips Corp Inrichting voor het kompenseren van signaal- uitvallen in een hoekgemoduleerd signaal.

Also Published As

Publication number Publication date
GB2032738A (en) 1980-05-08
SE7907946L (sv) 1980-04-03
AU531092B2 (en) 1983-08-11
AT384333B (de) 1987-10-27
MY8400054A (en) 1984-12-31
HK7983A (en) 1983-03-03
IT7926033A0 (it) 1979-09-26
SE435885B (sv) 1984-10-22
ATA643779A (de) 1987-03-15
IT1123352B (it) 1986-04-30
DE2939402C2 (de) 1985-03-21
FI68333C (fi) 1985-08-12
FR2438375B1 (fr) 1986-06-13
NL7907301A (nl) 1980-04-08
AU5117979A (en) 1980-04-17
SG61682G (en) 1983-09-02
DE2939402A1 (de) 1980-04-17
EG13936A (en) 1983-09-30
FI68333B (fi) 1985-04-30
GB2032738B (en) 1982-09-29
JPS6120942B2 (es) 1986-05-24
CA1129094A (en) 1982-08-03
SU1033016A3 (ru) 1983-07-30
US4203134A (en) 1980-05-13
PL133032B1 (en) 1985-05-31
FI792978A (fi) 1980-04-03
FR2438375A1 (fr) 1980-04-30
PL218690A1 (es) 1980-08-11
JPS5555450A (en) 1980-04-23

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19990601