FR2440655A1 - Circuit d'accord fin automatique - Google Patents

Circuit d'accord fin automatique

Info

Publication number
FR2440655A1
FR2440655A1 FR7926898A FR7926898A FR2440655A1 FR 2440655 A1 FR2440655 A1 FR 2440655A1 FR 7926898 A FR7926898 A FR 7926898A FR 7926898 A FR7926898 A FR 7926898A FR 2440655 A1 FR2440655 A1 FR 2440655A1
Authority
FR
France
Prior art keywords
switching means
tuning circuit
automatic end
capacitor
level comparator
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
FR7926898A
Other languages
English (en)
Other versions
FR2440655B1 (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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Publication of FR2440655A1 publication Critical patent/FR2440655A1/fr
Application granted granted Critical
Publication of FR2440655B1 publication Critical patent/FR2440655B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/08—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using varactors, i.e. voltage variable reactive diodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Television Receiver Circuits (AREA)

Abstract

A.CIRCUIT D'ACCORD FIN AUTOMATIQUE. B.CIRCUIT CARACTERISE EN CE QU'IL COMPORTE UN COMPARATEUR DE NIVEAU COMPARANT LA TENSION AUX BORNES DU CONDENSATEUR A UNE TENSION DE REFERENCE, UN PREMIER MOYEN DE COMMUTATION COMMANDE PAR LE COMPARATEUR DE NIVEAU POUR FORMER UN CHEMIN DE CHARGE POUR LE CONDENSATEUR, UN SECOND MOYEN DE COMMUTATION COMMANDE PAR LE COMPARATEUR DE NIVEAU POUR FORMER UN CHEMIN DE DECHARGE POUR LE CONDENSATEUR ET UN TROISIEME MOYEN DE COMMUTATION POUR METTRE HORS CIRCUIT LE PREMIER ET LE SECOND MOYENS DE COMMUTATION LORS DU FONCTIONNEMENT AFT. C.L'INVENTION S'APPLIQUE AU TRAITEMENT DES SIGNAUX VIDEO.
FR7926898A 1978-11-02 1979-10-30 Circuit d'accord fin automatique Expired FR2440655B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13548678A JPS5563118A (en) 1978-11-02 1978-11-02 Aft circuit

Publications (2)

Publication Number Publication Date
FR2440655A1 true FR2440655A1 (fr) 1980-05-30
FR2440655B1 FR2440655B1 (fr) 1985-09-27

Family

ID=15152840

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7926898A Expired FR2440655B1 (fr) 1978-11-02 1979-10-30 Circuit d'accord fin automatique

Country Status (8)

Country Link
US (1) US4263675A (fr)
JP (1) JPS5563118A (fr)
AU (1) AU534324B2 (fr)
CA (1) CA1135884A (fr)
DE (1) DE2944258A1 (fr)
FR (1) FR2440655B1 (fr)
GB (1) GB2035737B (fr)
NL (1) NL7908013A (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326296A (en) * 1980-10-01 1982-04-20 Magnavox Consumer Electronics Co. Tuning system for a color television receiver having a varactor tuner
JPS586431U (ja) * 1981-07-02 1983-01-17 三洋電機株式会社 チユ−ナの誤動作防止回路
JPS58114620A (ja) * 1981-12-28 1983-07-08 Matsushita Electric Ind Co Ltd 自動探局選局装置
DE3438286A1 (de) * 1984-10-16 1986-04-17 Hansen/Catito Elektronik, 1000 Berlin Verfahren und schaltungsanordnung zum umsetzen frequenzmodulierter signale ueber mindestens eine zwischenfrequenz in niederfrequenzsignale
DE3606250A1 (de) * 1986-02-24 1987-08-27 Hansen Elektronic & Co Verfahren und vorrichtung zum umsetzen frequenzmodulierter signale ueber mindestens eine zwischenfrequenz in niederfrequenzsignale
IT1221243B (it) * 1988-01-28 1990-06-27 Sgs Thomson Microelectronics Generazione di un impulso di arresto di una procedura di ricerca automatica di una stazione emittente utilizzando un segnale afo prodotto da un sistema di controllo automatico di frequenza di un ricevitore
US4814887A (en) * 1988-05-23 1989-03-21 General Instrument Corporation Automatic frequency control
US5842119A (en) * 1993-02-05 1998-11-24 Emerson; Harry Edwin Radio scanner and display system
KR960004515B1 (ko) * 1993-06-08 1996-04-06 엘지전자주식회사 티브이의 자동선국 인입범위 확장장치 및 그 방법
EP0783810A4 (fr) * 1994-08-04 2001-03-07 Harry Edwin Emerson Systeme de reception radio a balayage et d'affichage
JP4462729B2 (ja) * 2000-07-06 2010-05-12 株式会社ルネサステクノロジ 映像中間周波処理装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2015393A1 (fr) * 1968-08-09 1970-04-24 Philips Nv
FR2206632A1 (fr) * 1972-11-15 1974-06-07 Philips Nv
FR2215001A1 (fr) * 1973-01-23 1974-08-19 Sony Corp
FR2336830A1 (fr) * 1975-12-26 1977-07-22 Sony Corp Circuit de reglage fin automatique de la frequence d'accord d'un recepteur de television

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069637A (en) * 1961-07-31 1962-12-18 Jr Ralph M Seeley Electronic signal seeking means having tuning reactance automatically controlled by difference between concurrent and delayed detector output
GB1409798A (en) * 1971-09-25 1975-10-15 Matsushita Electric Ind Co Ltd Frequency control arrangements
DE2333851A1 (de) * 1973-07-03 1975-01-23 Standard Elektrik Lorenz Ag Verfahren und anordnungen zur selbsttaetigen nachregelung der mit einer abstimmanordnunggeingestellten oszillatorfrequenz eines ueberlagerungsempfangsteils einer bild und/oder tonwiedergabeanordnung
NL7313625A (fr) * 1973-10-04 1973-12-27
US3939427A (en) * 1974-08-05 1976-02-17 Quasar Electronics Corporation Automatic fine tuning defeat circuit
US3987399A (en) * 1974-09-11 1976-10-19 Pioneer Electronic Corporation Radio receiver
JPS528717A (en) * 1975-07-10 1977-01-22 Toshiba Corp Automatic channel selecteor
US4005256A (en) * 1975-11-03 1977-01-25 Gte Sylvania Incorporated AFC circuit
JPS5811131B2 (ja) * 1975-11-22 1983-03-01 ソニー株式会社 センキヨクソウチ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2015393A1 (fr) * 1968-08-09 1970-04-24 Philips Nv
FR2206632A1 (fr) * 1972-11-15 1974-06-07 Philips Nv
FR2215001A1 (fr) * 1973-01-23 1974-08-19 Sony Corp
FR2336830A1 (fr) * 1975-12-26 1977-07-22 Sony Corp Circuit de reglage fin automatique de la frequence d'accord d'un recepteur de television

Also Published As

Publication number Publication date
CA1135884A (fr) 1982-11-16
FR2440655B1 (fr) 1985-09-27
GB2035737B (en) 1982-12-22
JPS5563118A (en) 1980-05-13
GB2035737A (en) 1980-06-18
US4263675A (en) 1981-04-21
JPS576286B2 (fr) 1982-02-04
NL7908013A (nl) 1980-05-07
AU534324B2 (en) 1984-01-19
DE2944258A1 (de) 1980-05-08
AU5218179A (en) 1980-05-15

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Legal Events

Date Code Title Description
ST Notification of lapse