IT955524B - Circuito per il controllo automati co della sintonia - Google Patents

Circuito per il controllo automati co della sintonia

Info

Publication number
IT955524B
IT955524B IT24358/72A IT2435872A IT955524B IT 955524 B IT955524 B IT 955524B IT 24358/72 A IT24358/72 A IT 24358/72A IT 2435872 A IT2435872 A IT 2435872A IT 955524 B IT955524 B IT 955524B
Authority
IT
Italy
Prior art keywords
circuit
control
automated tuning
tuning
automated
Prior art date
Application number
IT24358/72A
Other languages
English (en)
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
Application granted granted Critical
Publication of IT955524B publication Critical patent/IT955524B/it

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
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
    • H03J7/24—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using varactors, i.e. voltage variable reactive diodes
    • H03J7/26—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using varactors, i.e. voltage variable reactive diodes in which an automatic frequency control circuit is brought into action after the scanning action has been stopped
    • 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
    • H03J5/0218—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, by selecting the corresponding analogue value between a set of preset values
    • 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
    • H03J5/0218—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, by selecting the corresponding analogue value between a set of preset values
    • H03J5/0236—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, by selecting the corresponding analogue value between a set of preset values with possibility to skip over certain counter positions, i.e. channel skipping, or scanning the counter position with a variable frequency rate
    • 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
    • H03J7/12—Combination of automatic frequency control voltage with stabilised varactor supply voltage
IT24358/72A 1971-05-17 1972-04-15 Circuito per il controllo automati co della sintonia IT955524B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14385871A 1971-05-17 1971-05-17

Publications (1)

Publication Number Publication Date
IT955524B true IT955524B (it) 1973-09-29

Family

ID=22505973

Family Applications (1)

Application Number Title Priority Date Filing Date
IT24358/72A IT955524B (it) 1971-05-17 1972-04-15 Circuito per il controllo automati co della sintonia

Country Status (12)

Country Link
US (1) US3743944A (it)
JP (1) JPS539685B1 (it)
AU (1) AU472185B2 (it)
BE (1) BE783504A (it)
CA (1) CA970844A (it)
DE (1) DE2224142B2 (it)
ES (1) ES402827A1 (it)
FR (1) FR2138042B1 (it)
GB (1) GB1396039A (it)
IT (1) IT955524B (it)
NL (1) NL7206583A (it)
SE (1) SE377989B (it)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2315798C3 (de) * 1973-03-29 1981-11-19 Siemens AG, 1000 Berlin und 8000 München Schaltung zur automatischen Frequenznachstimmung in Rundfunk- und Fernsehempfängern
US3855535A (en) * 1973-05-22 1974-12-17 Rca Corp Programming system for a motor-driven television receiver tuning apparatus
US3939427A (en) * 1974-08-05 1976-02-17 Quasar Electronics Corporation Automatic fine tuning defeat circuit
JPS547202A (en) * 1977-06-20 1979-01-19 Pioneer Electronic Corp Electronic tuning receiver
GB2129988A (en) * 1982-10-02 1984-05-23 Smith & Nephew Ass Patient support means
JPS59203040A (ja) * 1983-04-27 1984-11-17 Miki Puurii Kk 製袋機におけるフイルム送り装置
US4504973A (en) * 1984-03-02 1985-03-12 Aed Satellite Systems, Ltd. Automatic disabling of AFC/AFT controller during receiver circuit tuning

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467872A (en) * 1965-07-27 1969-09-16 Trio Corp Automatic frequency sweep apparatus
US3467873A (en) * 1966-12-19 1969-09-16 Electrohome Ltd A.f.c. defeat networks for signal seeking receivers
AT276509B (de) * 1968-02-22 1969-11-25 Wiener Schwachstromwerke Gmbh Abstimmeinrichtung mit Potentiometereinstellung
US3528043A (en) * 1968-12-17 1970-09-08 Servo Corp Of America Voltage controllable tuning circuit which responds linearly in frequency with linear dial changes
GB1316871A (en) * 1969-05-20 1973-05-16 Matsushita Electric Ind Co Ltd Tuning system for selecting channels
US3632864A (en) * 1969-06-02 1972-01-04 Rca Corp Signal seeking system for radio receivers with tuning indicating circuitry for controlling the signal seeking
US3597531A (en) * 1970-01-19 1971-08-03 Sylvania Electric Prod Bidirectional signal seeking remote control system
US3631349A (en) * 1970-03-09 1971-12-28 Sylvania Electric Prod Automatic signal-seeking circuitry

Also Published As

Publication number Publication date
US3743944A (en) 1973-07-03
FR2138042A1 (it) 1972-12-29
GB1396039A (en) 1975-05-29
DE2224142B2 (de) 1977-07-14
AU472185B2 (en) 1976-05-20
AU4182972A (en) 1973-11-08
DE2224142A1 (de) 1972-11-30
ES402827A1 (es) 1975-04-16
NL7206583A (it) 1972-11-21
SE377989B (it) 1975-08-04
JPS539685B1 (it) 1978-04-07
BE783504A (fr) 1972-09-01
CA970844A (en) 1975-07-08
FR2138042B1 (it) 1978-06-02

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