FR2426362A1 - FREQUENCY SELECTOR TUNING CIRCUIT FOR RADIO-ELECTRIC OR TELEVISION RECEIVER - Google Patents

FREQUENCY SELECTOR TUNING CIRCUIT FOR RADIO-ELECTRIC OR TELEVISION RECEIVER

Info

Publication number
FR2426362A1
FR2426362A1 FR7912555A FR7912555A FR2426362A1 FR 2426362 A1 FR2426362 A1 FR 2426362A1 FR 7912555 A FR7912555 A FR 7912555A FR 7912555 A FR7912555 A FR 7912555A FR 2426362 A1 FR2426362 A1 FR 2426362A1
Authority
FR
France
Prior art keywords
station
tune
signal
user
input signal
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.)
Withdrawn
Application number
FR7912555A
Other languages
French (fr)
Inventor
Stephen Swift
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of FR2426362A1 publication Critical patent/FR2426362A1/en
Withdrawn legal-status Critical Current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
    • H03J7/06—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 counters or frequency dividers
    • H03J7/065—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 counters or frequency dividers the counter or frequency divider being used in a phase locked loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
    • H03J5/0281—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer the digital values being held in an auxiliary non erasable memory

Abstract

Ce circuit comprend un clavier d'entrée recevant un code formé par un usager et un calculateur bus 108 d'adresse à partir du signal d'entrée qui sert également à incrémenter un signal appliqué à une boucle à verrouillage de phase 100-101-103-105 pour s'accorder sur une station. Une fois la station trouvée et le signal d'entrée ayant été appliqué au clavier, le signal incrémenté qui est un rapport de division appliqué à un diviseur programmable 105, lequel applique un signal de sortie, variable à un comparateur de phase 103 de la boucle, est emmagasiné dans une mémoire à accès aléatoire en un emplacement désigné par les adresses calculées. Un mode de recherche permet à l'usager de localiser toutes les stations et de mettre en mémoire les rapports de division qui peuvent être utilisés pour s'accorder sur cette station à une date ultérieure. Pour s'accorder sur une station particulière, l'usager devra former le code sélectionné. Le calculateur calculera 'adresse de ce signal d'entrée et retrouvera le rapport de division à partir de la mémoire, rapport identifié par cette adresse pour l'appliquer au diviseur programmable et provoquer l'accord du synthétiseur de fréquence sur la station représentée par le code.This circuit comprises an input keyboard receiving a code formed by a user and a bus address calculator 108 from the input signal which also serves to increment a signal applied to a phase locked loop 100-101-103 -105 to tune to a station. Once the station has been found and the input signal has been applied to the keyboard, the incremented signal which is a division ratio applied to a programmable divider 105, which applies an output signal, variable to a phase comparator 103 of the loop , is stored in a random access memory at a location designated by the calculated addresses. A search mode allows the user to locate all stations and store division ratios that can be used to tune to that station at a later date. To tune in to a particular station, the user must enter the selected code. The computer will calculate the address of this input signal and will find the division ratio from the memory, ratio identified by this address to apply it to the programmable divider and cause the frequency synthesizer to tune to the station represented by the coded.

FR7912555A 1978-05-19 1979-05-17 FREQUENCY SELECTOR TUNING CIRCUIT FOR RADIO-ELECTRIC OR TELEVISION RECEIVER Withdrawn FR2426362A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPD444178 1978-05-19
AUPD599778 1978-09-18

Publications (1)

Publication Number Publication Date
FR2426362A1 true FR2426362A1 (en) 1979-12-14

Family

ID=25642223

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7912555A Withdrawn FR2426362A1 (en) 1978-05-19 1979-05-17 FREQUENCY SELECTOR TUNING CIRCUIT FOR RADIO-ELECTRIC OR TELEVISION RECEIVER

Country Status (6)

Country Link
JP (1) JPS556994A (en)
AU (1) AU4646579A (en)
DE (1) DE2918503A1 (en)
FR (1) FR2426362A1 (en)
GB (1) GB2021887A (en)
ZA (1) ZA791982B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS593891B2 (en) * 1979-01-17 1984-01-26 ソニー株式会社 Reception detection circuit
JPS5885623A (en) * 1981-11-18 1983-05-23 Pioneer Electronic Corp Tuning method of amplitude modulation receiver
DE3319250A1 (en) * 1983-05-27 1984-11-29 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Receiver with automatic location finding
US4737993A (en) * 1987-01-21 1988-04-12 Rca Corporation Cable broadcast TV receiver with automatic channel search responsive to mode change
JP2625759B2 (en) * 1987-09-22 1997-07-02 ソニー株式会社 Auto tuning device
US5023938A (en) * 1988-06-03 1991-06-11 Pioneer Electronic Corporation Station selecting device in tuner for automatic selection according to input information
US4914517A (en) * 1989-04-06 1990-04-03 Thomson Consumer Electronics, Inc. Tuner control apparatus having tune-by-label capability and using alphabetical label storage
DE3913278A1 (en) * 1989-04-22 1990-10-25 Thomson Brandt Gmbh BROADCAST RECEIVER WITH DIGITAL FREQUENCY ENTRY
US5045947A (en) * 1989-05-31 1991-09-03 Jack Beery Television receiver having memory control for tune-by-label feature
US5963269A (en) * 1995-06-07 1999-10-05 Beery; Jack Apparatus for controlling a television receiver using a plurality of stored labels

Also Published As

Publication number Publication date
GB2021887A (en) 1979-12-05
ZA791982B (en) 1980-04-30
DE2918503A1 (en) 1979-11-29
JPS556994A (en) 1980-01-18
AU4646579A (en) 1979-11-22

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Legal Events

Date Code Title Description
ST Notification of lapse