FR2452219A1 - Circuit d'accord et de controle automatique de frequence pour etage de reception de television a haute frequence - Google Patents

Circuit d'accord et de controle automatique de frequence pour etage de reception de television a haute frequence

Info

Publication number
FR2452219A1
FR2452219A1 FR7907167A FR7907167A FR2452219A1 FR 2452219 A1 FR2452219 A1 FR 2452219A1 FR 7907167 A FR7907167 A FR 7907167A FR 7907167 A FR7907167 A FR 7907167A FR 2452219 A1 FR2452219 A1 FR 2452219A1
Authority
FR
France
Prior art keywords
intermediate frequency
tuning circuit
preset value
cycles
control circuit
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
FR7907167A
Other languages
English (en)
Other versions
FR2452219B1 (fr
Inventor
Jean-Michel Pernot
Philippe Weil-Rabaud
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.)
Laboratoires dElectronique Philips SAS
Original Assignee
Laboratoires dElectronique et de Physique Appliquee
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 Laboratoires dElectronique et de Physique Appliquee filed Critical Laboratoires dElectronique et de Physique Appliquee
Priority to FR7907167A priority Critical patent/FR2452219A1/fr
Publication of FR2452219A1 publication Critical patent/FR2452219A1/fr
Application granted granted Critical
Publication of FR2452219B1 publication Critical patent/FR2452219B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

ETAGE DE RECEPTION DE TELEVISION A HAUTE FREQUENCE COMPRENANT UN CIRCUIT D'ACCORD DE FREQUENCE PAR REGLAGE D'UNE TENSION CONTINUE AUX BORNES D'UNE DIODE A CAPACITE VARIABLE ET ETANT SUIVI D'UN ETAGE D'AMPLIFICATION A FREQUENCE INTERMEDIAIRE. CE CIRCUIT EST COMPOSE D'UN ETAGE NUMERIQUE DE COMMANDE AUTOMATIQUE DE FREQUENCE COMPRENANT UN OSCILLATEUR DE REFERENCE DEFINISSANT UNE FREQUENCE INTERMEDIAIRE DE REFERENCE ET UN CIRCUIT DE COMPARAISON DES SIGNAUX FOURNIS RESPECTIVEMENT PAR L'ETAGE D'AMPLIFICATION A FREQUENCE INTERMEDIAIRE ET PAR L'OSCILLATEUR DE REFERENCE. CE CIRCUIT DE COMPARAISON EST LUI-MEME COMPOSE D'UN PREMIER COMPTEUR DES SIGNAUX DELIVRES PAR L'ETAGE D'AMPLIFICATION A FREQUENCE INTERMEDIAIRE, D'UN DEUXIEME COMPTEUR DES SIGNAUX DELIVRES PAR L'OSCILLATEUR DE REFERENCE, ET D'UN COMPARATEUR DELIVRANT LE SIGNAL DE CORRECTION DE FREQUENCE SOUS LA FORME D'UN SIGNAL NUMERIQUE GENERE A PARTIR DE LA VALEUR RESIDUELLE DE L'UN DES COMPTEURS LORSQUE L'AUTRE PASSE PAR ZERO. APPLICATION: RECEPTEURS DE TELEVISION.
FR7907167A 1979-03-21 1979-03-21 Circuit d'accord et de controle automatique de frequence pour etage de reception de television a haute frequence Granted FR2452219A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7907167A FR2452219A1 (fr) 1979-03-21 1979-03-21 Circuit d'accord et de controle automatique de frequence pour etage de reception de television a haute frequence

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7907167A FR2452219A1 (fr) 1979-03-21 1979-03-21 Circuit d'accord et de controle automatique de frequence pour etage de reception de television a haute frequence

Publications (2)

Publication Number Publication Date
FR2452219A1 true FR2452219A1 (fr) 1980-10-17
FR2452219B1 FR2452219B1 (fr) 1983-12-30

Family

ID=9223403

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7907167A Granted FR2452219A1 (fr) 1979-03-21 1979-03-21 Circuit d'accord et de controle automatique de frequence pour etage de reception de television a haute frequence

Country Status (1)

Country Link
FR (1) FR2452219A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2322499A1 (fr) * 1975-08-28 1977-03-25 Sony Corp Selecteur de canaux a accord automatique pour recepteur de television
US4025953A (en) * 1975-11-26 1977-05-24 Quasar Electronics Corporation Frequency synthesizer tuning system for television receivers
FR2332652A1 (fr) * 1975-11-22 1977-06-17 Sony Corp Selecteur de canaux a accord automatique pour recepteur de television
GB1513963A (en) * 1976-07-21 1978-06-14 British Aircraft Corp Ltd Phase detector
US4123716A (en) * 1976-08-12 1978-10-31 The Magnavox Company Automatic frequency control for digital tuning systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2322499A1 (fr) * 1975-08-28 1977-03-25 Sony Corp Selecteur de canaux a accord automatique pour recepteur de television
FR2332652A1 (fr) * 1975-11-22 1977-06-17 Sony Corp Selecteur de canaux a accord automatique pour recepteur de television
US4025953A (en) * 1975-11-26 1977-05-24 Quasar Electronics Corporation Frequency synthesizer tuning system for television receivers
GB1513963A (en) * 1976-07-21 1978-06-14 British Aircraft Corp Ltd Phase detector
US4123716A (en) * 1976-08-12 1978-10-31 The Magnavox Company Automatic frequency control for digital tuning systems

Also Published As

Publication number Publication date
FR2452219B1 (fr) 1983-12-30

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Legal Events

Date Code Title Description
ST Notification of lapse