FR2454230A1 - Dispositif de compensation de defauts d'un signal module en frequence - Google Patents

Dispositif de compensation de defauts d'un signal module en frequence

Info

Publication number
FR2454230A1
FR2454230A1 FR8008076A FR8008076A FR2454230A1 FR 2454230 A1 FR2454230 A1 FR 2454230A1 FR 8008076 A FR8008076 A FR 8008076A FR 8008076 A FR8008076 A FR 8008076A FR 2454230 A1 FR2454230 A1 FR 2454230A1
Authority
FR
France
Prior art keywords
signal
circuit
frequency
demodulated
frequency modulated
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
FR8008076A
Other languages
English (en)
Other versions
FR2454230B1 (fr
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 FR2454230A1 publication Critical patent/FR2454230A1/fr
Application granted granted Critical
Publication of FR2454230B1 publication Critical patent/FR2454230B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/18—Automatic control in untuned amplifiers

Landscapes

  • Television Signal Processing For Recording (AREA)
  • Noise Elimination (AREA)

Abstract

L'INVENTION CONCERNE UN SYSTEME POUR TRAITER UNE ONDE D'UN SIGNAL MODULE EN FREQUENCE DANS UN TRAJET PRINCIPAL ET POUR APPLIQUER UN SIGNAL DEMODULE A UN MOYEN D'UTILISATION. SELON L'INVENTION, ON PREVOIT UN DETECTEUR 30 DE CHUTE DU SIGNAL, SENSIBLE AU SIGNAL MODULE EN FREQUENCE POUR DETECTER DES INTERVALLES DE TEMPS OU IL EST A DES NIVEAUX DIMINUES, ET PRODUIRE UN SIGNAL IMPULSIONNEL CORRESPONDANT; UN MOYEN 32, 34 DE MODIFICATION DES IMPULSIONS SENSIBLE AU SIGNAL DU DETECTEUR 30 POUR PRODUIRE UN SIGNAL PLUS LONG: UN CIRCUIT COMPRENANT UN MOYEN A IMPEDANCE VARIABLE 38 RELIE A UN CIRCUIT DE DESACCENTUATION 40 CONTENANT DES ELEMENTS CAPACITIF ET RESISTIF FIXE, L'IMPEDANCE ETANT REGLEE PAR LE SIGNAL DU MOYEN 34, LE CIRCUIT SERVANT A FAIRE VARIER LA REPONSE EN FREQUENCE DU CIRCUIT 40 POUR APPLIQUER UN SIGNAL DEMODULE ET SENSIBLEMENT LISSE AU MOYEN D'UTILISATION 44 PENDANT LA PRESENCE DU SIGNAL DU MOYEN 32, 34. L'INVENTION S'APPLIQUE NOTAMMENT A LA RESTITUTION DE VIDEO-DISQUES, BANDES VIDEO ET RADIOS FM.
FR8008076A 1979-04-11 1980-04-10 Dispositif de compensation de defauts d'un signal module en frequence Granted FR2454230A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/029,152 US4221930A (en) 1979-04-11 1979-04-11 FM Defect compensation apparatus

Publications (2)

Publication Number Publication Date
FR2454230A1 true FR2454230A1 (fr) 1980-11-07
FR2454230B1 FR2454230B1 (fr) 1984-04-13

Family

ID=21847535

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8008076A Granted FR2454230A1 (fr) 1979-04-11 1980-04-10 Dispositif de compensation de defauts d'un signal module en frequence

Country Status (5)

Country Link
US (1) US4221930A (fr)
JP (1) JPS55143843A (fr)
DE (1) DE3014052A1 (fr)
FR (1) FR2454230A1 (fr)
GB (1) GB2047056B (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4393489A (en) * 1981-03-30 1983-07-12 Rca Corporation Audio processor for single, channel, matrixed two-channel and un-matrixed two-channel signals
US4462048A (en) * 1982-02-11 1984-07-24 Rca Corporation Noise reduction circuitry for audio signals
JPS5916109A (ja) * 1982-07-16 1984-01-27 Pioneer Electronic Corp オ−デイオ信号の記録再生方式
JPS59104314U (ja) * 1982-12-25 1984-07-13 パイオニア株式会社 ドロップアウト補償装置
IT1212744B (it) * 1983-05-19 1989-11-30 Sogs Ates Componenti Elettroni Circuito per l'attenuazione dei disturbi in un radioricevitore mediante l'impiego di un filtro passa-basso a banda passante regolabile.
US4692914A (en) * 1983-05-31 1987-09-08 Canon Kabushiki Kaisha Reproducing device for frequency modulated signals
JPS59231708A (ja) * 1983-06-14 1984-12-26 Sony Corp 信号処理装置
JPS6085449U (ja) * 1983-11-16 1985-06-12 パイオニア株式会社 パルス性ノイズ抑制装置
JPH08257218A (ja) * 1995-03-20 1996-10-08 Toyomaru Sangyo Kk パチンコ機の管理装置
JP2004040169A (ja) * 2002-06-28 2004-02-05 Toyota Industries Corp 受信機

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909518A (en) * 1974-06-06 1975-09-30 Rca Corp Signal switching apparatus for compensating record defects
US3912858A (en) * 1974-02-14 1975-10-14 Philips Corp Device for the detection of signal drop-outs
US3925811A (en) * 1973-08-07 1975-12-09 Philips Corp Apparatus having dropout detection and compensation for reproducing a video signal recorded on a record
FR2388361A1 (fr) * 1977-04-20 1978-11-17 Rca Corp Compensation de defauts dans des systemes audio-frequence
FR2410406A1 (fr) * 1977-11-29 1979-06-22 Rca Corp Compensateur de chute hors limite d'un signal avec detecteur de chute hors limite d'une duree proportionnelle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925811A (en) * 1973-08-07 1975-12-09 Philips Corp Apparatus having dropout detection and compensation for reproducing a video signal recorded on a record
US3912858A (en) * 1974-02-14 1975-10-14 Philips Corp Device for the detection of signal drop-outs
US3909518A (en) * 1974-06-06 1975-09-30 Rca Corp Signal switching apparatus for compensating record defects
FR2388361A1 (fr) * 1977-04-20 1978-11-17 Rca Corp Compensation de defauts dans des systemes audio-frequence
FR2410406A1 (fr) * 1977-11-29 1979-06-22 Rca Corp Compensateur de chute hors limite d'un signal avec detecteur de chute hors limite d'une duree proportionnelle

Also Published As

Publication number Publication date
GB2047056B (en) 1983-11-02
DE3014052A1 (de) 1980-10-30
FR2454230B1 (fr) 1984-04-13
US4221930A (en) 1980-09-09
GB2047056A (en) 1980-11-19
JPS55143843A (en) 1980-11-10
JPS6210454B2 (fr) 1987-03-06

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Legal Events

Date Code Title Description
ST Notification of lapse