CA970844A - Automatic tuning control circuits - Google Patents

Automatic tuning control circuits

Info

Publication number
CA970844A
CA970844A CA141,013A CA141013A CA970844A CA 970844 A CA970844 A CA 970844A CA 141013 A CA141013 A CA 141013A CA 970844 A CA970844 A CA 970844A
Authority
CA
Canada
Prior art keywords
control circuits
tuning control
automatic tuning
automatic
circuits
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.)
Expired
Application number
CA141,013A
Other languages
English (en)
Other versions
CA141013S (en
Inventor
Thomas A. Bridgewater
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
Application granted granted Critical
Publication of CA970844A publication Critical patent/CA970844A/en
Expired 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
    • H03J7/18—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
CA141,013A 1971-05-17 1972-05-01 Automatic tuning control circuits Expired CA970844A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
CA970844A true CA970844A (en) 1975-07-08

Family

ID=22505973

Family Applications (1)

Application Number Title Priority Date Filing Date
CA141,013A Expired CA970844A (en) 1971-05-17 1972-05-01 Automatic tuning control circuits

Country Status (12)

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

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
BE783504A (fr) 1972-09-01
FR2138042B1 (fr) 1978-06-02
GB1396039A (en) 1975-05-29
IT955524B (it) 1973-09-29
ES402827A1 (es) 1975-04-16
AU472185B2 (en) 1976-05-20
AU4182972A (en) 1973-11-08
FR2138042A1 (fr) 1972-12-29
JPS539685B1 (fr) 1978-04-07
NL7206583A (fr) 1972-11-21
SE377989B (fr) 1975-08-04
DE2224142B2 (de) 1977-07-14
US3743944A (en) 1973-07-03
DE2224142A1 (de) 1972-11-30

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