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IT1030337B - Disposizione circuitale per la sintonizzazione e commutazione di gamma d banda di un circuito risonante a radiofrequenza - Google Patents

Disposizione circuitale per la sintonizzazione e commutazione di gamma d banda di un circuito risonante a radiofrequenza

Info

Publication number
IT1030337B
IT1030337B IT67638/75A IT6763875A IT1030337B IT 1030337 B IT1030337 B IT 1030337B IT 67638/75 A IT67638/75 A IT 67638/75A IT 6763875 A IT6763875 A IT 6763875A IT 1030337 B IT1030337 B IT 1030337B
Authority
IT
Italy
Prior art keywords
tuning
band
switching
range
circuit
Prior art date
Application number
IT67638/75A
Other languages
English (en)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Application granted granted Critical
Publication of IT1030337B publication Critical patent/IT1030337B/it

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes
    • 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
    • H03J5/24—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
    • H03J5/244—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means
IT67638/75A 1974-03-16 1975-03-13 Disposizione circuitale per la sintonizzazione e commutazione di gamma d banda di un circuito risonante a radiofrequenza IT1030337B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2412689A DE2412689C3 (de) 1974-03-16 1974-03-16 Schaltungsanordnung zur Abstimmung und Bereichs- bzw. Bandumschaltung eines HF-Schwingungskreises

Publications (1)

Publication Number Publication Date
IT1030337B true IT1030337B (it) 1979-03-30

Family

ID=5910253

Family Applications (1)

Application Number Title Priority Date Filing Date
IT67638/75A IT1030337B (it) 1974-03-16 1975-03-13 Disposizione circuitale per la sintonizzazione e commutazione di gamma d banda di un circuito risonante a radiofrequenza

Country Status (7)

Country Link
US (1) US3980957A (it)
JP (1) JPS50128403A (it)
DE (1) DE2412689C3 (it)
ES (1) ES435625A1 (it)
FR (1) FR2264425B1 (it)
IT (1) IT1030337B (it)
NL (1) NL7502915A (it)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5544348Y2 (it) * 1975-09-20 1980-10-17
JPS5313330A (en) * 1976-07-22 1978-02-06 Sony Corp Broad band resonance circuit
FR2371821A1 (fr) * 1976-10-25 1978-06-16 Indesit Dispositif d'accord pour recepteur de television
US4363135A (en) * 1980-10-27 1982-12-07 Zenith Radio Corporation Four band VHF varactor tuner
US4339827A (en) * 1980-11-25 1982-07-13 Rca Corporation Automatic tuning circuit arrangement with switched impedances
US4480338A (en) * 1982-03-01 1984-10-30 Zenith Electronics Corporation Lowpass-highpass electronic switch
US4418428A (en) * 1982-03-30 1983-11-29 Rca Corporation Tuning system for a multi-band television receiver
US4418427A (en) * 1982-03-30 1983-11-29 Rca Corporation Tuning system for a multi-band television receiver
US4486723A (en) * 1983-01-06 1984-12-04 Rca Corporation Diode switching system for a selectable impedance matching network
DE3321262A1 (de) * 1983-06-11 1984-12-13 Telefunken electronic GmbH, 7100 Heilbronn Abstimmschaltung fuer die bereiche uhf- und vhf
US4567523A (en) * 1983-12-05 1986-01-28 North American Philips Consumer Electronics Corp. Television receiver input circuit
JPS61113437U (it) * 1984-12-26 1986-07-17
US4602222A (en) * 1985-04-19 1986-07-22 General Electric Company Circuit for bandswitching a voltage controlled oscillator
DE3633384A1 (de) * 1986-10-01 1988-04-14 Telefunken Electronic Gmbh Fernsehtuner fuer drei unterschiedliche frequenzbereiche
NL8701641A (nl) * 1987-07-13 1989-02-01 Philips Nv Tv-hf ingangsschakeling.
DE3821716A1 (de) * 1988-06-28 1990-01-04 Telefunken Electronic Gmbh Fernsehtuner mit einer bandfilterschaltung
DE4006018A1 (de) * 1990-02-26 1991-08-29 Thomson Brandt Gmbh Schaltungsanordnung zur erzeugung einer sperrspannung fuer schaltdioden
JP3020389B2 (ja) * 1993-08-19 2000-03-15 シャープ株式会社 チューナ回路
KR100442900B1 (ko) * 1996-01-10 2004-10-28 코닌클리케 필립스 일렉트로닉스 엔.브이. 텔레비전/주파수변조수신기
US6862437B1 (en) * 1999-06-03 2005-03-01 Tyco Electronics Corporation Dual band tuning
JP2002359572A (ja) * 2001-05-31 2002-12-13 Alps Electric Co Ltd テレビジョンチューナ
JP2009290270A (ja) * 2008-05-27 2009-12-10 Alps Electric Co Ltd アンテナ装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1296226C2 (de) * 1967-12-09 1978-03-16 Philips" Patentverwaltung GmbH, 2000 Hamburg Abstimm-schaltungsanordnung mit einer schaltdiode
US3617915A (en) * 1969-06-29 1971-11-02 Hitachi Ltd Tuning circuit having a neutralizing circuit
US3646450A (en) * 1969-08-13 1972-02-29 Zenith Radio Corp Voltage-controlled plural-band tuner for a wave signal receiver
JPS4934262A (it) * 1972-07-28 1974-03-29
JPS4955209A (it) * 1972-09-29 1974-05-29
US3825858A (en) * 1973-02-23 1974-07-23 Hitachi Ltd Local oscillator for use in a vhf tuner for a television receiver

Also Published As

Publication number Publication date
US3980957A (en) 1976-09-14
ES435625A1 (es) 1976-12-16
DE2412689C3 (de) 1978-04-27
DE2412689B2 (de) 1977-09-08
FR2264425B1 (it) 1978-12-29
DE2412689A1 (de) 1975-09-18
AU7915175A (en) 1976-09-23
NL7502915A (nl) 1975-09-18
JPS50128403A (it) 1975-10-09
FR2264425A1 (it) 1975-10-10

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