DE19715956C2 - Eingangsschaltung für einen Fernsehtuner - Google Patents

Eingangsschaltung für einen Fernsehtuner

Info

Publication number
DE19715956C2
DE19715956C2 DE19715956A DE19715956A DE19715956C2 DE 19715956 C2 DE19715956 C2 DE 19715956C2 DE 19715956 A DE19715956 A DE 19715956A DE 19715956 A DE19715956 A DE 19715956A DE 19715956 C2 DE19715956 C2 DE 19715956C2
Authority
DE
Germany
Prior art keywords
capacitor
frequency
capacitance
circuit
input 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.)
Expired - Fee Related
Application number
DE19715956A
Other languages
German (de)
English (en)
Other versions
DE19715956A1 (de
Inventor
Tsutomu Kunishima
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.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric Co Ltd
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 Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Publication of DE19715956A1 publication Critical patent/DE19715956A1/de
Application granted granted Critical
Publication of DE19715956C2 publication Critical patent/DE19715956C2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/12—Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1708—Comprising bridging elements, i.e. elements in a series path without own reference to ground and spanning branching nodes of another series path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/175—Series LC in series path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1758—Series LC in shunt or branch path
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Noise Elimination (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
DE19715956A 1996-04-17 1997-04-16 Eingangsschaltung für einen Fernsehtuner Expired - Fee Related DE19715956C2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8095487A JPH09284157A (ja) 1996-04-17 1996-04-17 テレビジョンチューナの入力回路

Publications (2)

Publication Number Publication Date
DE19715956A1 DE19715956A1 (de) 1997-11-06
DE19715956C2 true DE19715956C2 (de) 2003-08-14

Family

ID=14138970

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19715956A Expired - Fee Related DE19715956C2 (de) 1996-04-17 1997-04-16 Eingangsschaltung für einen Fernsehtuner

Country Status (6)

Country Link
JP (1) JPH09284157A (es)
KR (1) KR100243838B1 (es)
CN (1) CN1164795A (es)
DE (1) DE19715956C2 (es)
GB (1) GB2312345A (es)
MX (1) MX9702782A (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3592160B2 (ja) 1999-11-25 2004-11-24 アルプス電気株式会社 チューナの複同調回路
DE60333729D1 (de) * 2002-02-01 2010-09-23 Nxp Bv Fernsehtuner und darin verwendete leiterplatte
JP3675438B2 (ja) * 2002-10-31 2005-07-27 松下電器産業株式会社 高周波受信装置
JP3096170U (ja) * 2003-02-27 2003-09-05 アルプス電気株式会社 テレビジョンチューナの入力回路
JP3097064U (ja) * 2003-04-09 2004-01-15 アルプス電気株式会社 入力同調回路
DE10330449B3 (de) * 2003-07-05 2005-02-24 Daimlerchrysler Ag Nockenwellenversteller
EP1889360A1 (en) * 2005-06-09 2008-02-20 TELEFONAKTIEBOLAGET LM ERICSSON (publ) A tunable circuit arrangement and a method for providing such an arrangement
CN101179677B (zh) * 2006-11-08 2011-12-14 奇景光电股份有限公司 电视调谐器与其制造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4771332A (en) * 1986-08-22 1988-09-13 Kabushiki Kaisha Toshiba Tuning apparatus for the VHF band of a television receiver
US4835608A (en) * 1988-05-31 1989-05-30 Zenith Electronics Corporation Image trap filter circuit
US5054117A (en) * 1989-08-01 1991-10-01 Zenith Electronics Corporation Tunable UHF filter for switchable VHF/UHF receiver
JPH06252706A (ja) * 1993-02-26 1994-09-09 Alps Electric Co Ltd Ｔｖチューナの入力同調回路

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0352323A (ja) * 1989-07-19 1991-03-06 Matsushita Electric Ind Co Ltd 電子チューナ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4771332A (en) * 1986-08-22 1988-09-13 Kabushiki Kaisha Toshiba Tuning apparatus for the VHF band of a television receiver
US4835608A (en) * 1988-05-31 1989-05-30 Zenith Electronics Corporation Image trap filter circuit
US5054117A (en) * 1989-08-01 1991-10-01 Zenith Electronics Corporation Tunable UHF filter for switchable VHF/UHF receiver
JPH06252706A (ja) * 1993-02-26 1994-09-09 Alps Electric Co Ltd Ｔｖチューナの入力同調回路

Also Published As

Publication number Publication date
DE19715956A1 (de) 1997-11-06
KR100243838B1 (ko) 2000-02-01
GB9707390D0 (en) 1997-05-28
KR970073038A (ko) 1997-11-07
CN1164795A (zh) 1997-11-12
JPH09284157A (ja) 1997-10-31
GB2312345A (en) 1997-10-22
MX9702782A (es) 1998-04-30

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8304 Grant after examination procedure
8363 Opposition against the patent
8339 Ceased/non-payment of the annual fee