JPS59180545U - TV tuner for wideband reception - Google Patents

TV tuner for wideband reception

Info

Publication number
JPS59180545U
JPS59180545U JP1983073966U JP7396683U JPS59180545U JP S59180545 U JPS59180545 U JP S59180545U JP 1983073966 U JP1983073966 U JP 1983073966U JP 7396683 U JP7396683 U JP 7396683U JP S59180545 U JPS59180545 U JP S59180545U
Authority
JP
Japan
Prior art keywords
coupling capacitor
tuner
circuit
wideband reception
reception
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.)
Granted
Application number
JP1983073966U
Other languages
Japanese (ja)
Other versions
JPH0136365Y2 (en
Inventor
憲一 関
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Priority to JP1983073966U priority Critical patent/JPS59180545U/en
Priority to KR1019840002648A priority patent/KR890004205B1/en
Publication of JPS59180545U publication Critical patent/JPS59180545U/en
Application granted granted Critical
Publication of JPH0136365Y2 publication Critical patent/JPH0136365Y2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来一般のテレビチューナのｖＨＦ受信部の回
路図、第２図ａ−ｂは同テレビチューナにおける各バン
ド受信時の等価回路図、第３図は従来の広帯域受信用テ
レビチューナの回路図、第４図は本考案の広帯域受信用
テレビチューナの一実施例の回路図、艷５図ａ−ｂは同
実施例における各バンド受信時の等価回路図である。 １・・・ＲＦ増幅回路、２・・・局部発振回路、３・・
・混合回路、Ｃ５・・・結合コンデンサ、Ｃ８・・・補
助結合用コンデンサ、Ｄ、二・・バンド切換用ダイオー
ド。Fig. 1 is a circuit diagram of the vHF reception section of a conventional general TV tuner, Fig. 2 a-b is an equivalent circuit diagram of each band reception in the same TV tuner, and Fig. 3 is a circuit diagram of a conventional TV tuner for wideband reception. Figures 4 and 4 are circuit diagrams of an embodiment of the television tuner for wideband reception of the present invention, and Figures 5a and 5b are equivalent circuit diagrams at the time of reception of each band in the same embodiment. 1... RF amplifier circuit, 2... local oscillation circuit, 3...
・Mixing circuit, C5...coupling capacitor, C8...auxiliary coupling capacitor, D, 2...band switching diode.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ＲＦ増幅回路と混合回路とを結合コンデンサにて結合す
る段間結合回路において、バンド切換用タイオードの陰
極と混合回路の入力端との間に補−助結合用コンデンサ
を接続し、ローバンド受信時に上記結合コンデンサと実
質的に並列に補助結合用コンデンサを挿入するようにし
たことを特徴とする広帯域受信用テレビチューナ。In an interstage coupling circuit that couples an RF amplifier circuit and a mixing circuit with a coupling capacitor, an auxiliary coupling capacitor is connected between the cathode of the band switching diode and the input terminal of the mixing circuit, and the above-mentioned A television tuner for broadband reception, characterized in that an auxiliary coupling capacitor is inserted substantially in parallel with a coupling capacitor.
JP1983073966U 1983-05-18 1983-05-18 TV tuner for wideband reception Granted JPS59180545U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1983073966U JPS59180545U (en) 1983-05-18 1983-05-18 TV tuner for wideband reception
KR1019840002648A KR890004205B1 (en) 1983-05-18 1984-05-16 Television tuner for wideband receive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1983073966U JPS59180545U (en) 1983-05-18 1983-05-18 TV tuner for wideband reception

Publications (2)

Publication Number Publication Date
JPS59180545U true JPS59180545U (en) 1984-12-03
JPH0136365Y2 JPH0136365Y2 (en) 1989-11-06

Family

ID=30204075

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1983073966U Granted JPS59180545U (en) 1983-05-18 1983-05-18 TV tuner for wideband reception

Country Status (2)

Country Link
JP (1) JPS59180545U (en)
KR (1) KR890004205B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3884409B2 (en) * 2003-06-04 2007-02-21 株式会社東芝 ANTENNA DEVICE AND WIRELESS COMMUNICATION DEVICE

Also Published As

Publication number Publication date
KR890004205B1 (en) 1989-10-27
JPH0136365Y2 (en) 1989-11-06
KR840008902A (en) 1984-12-19

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