JPS5956840U - CATV tuner input circuit - Google Patents

CATV tuner input circuit

Info

Publication number
JPS5956840U
JPS5956840U JP14848982U JP14848982U JPS5956840U JP S5956840 U JPS5956840 U JP S5956840U JP 14848982 U JP14848982 U JP 14848982U JP 14848982 U JP14848982 U JP 14848982U JP S5956840 U JPS5956840 U JP S5956840U
Authority
JP
Japan
Prior art keywords
band
tuner
vhf
input circuit
stages
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
JP14848982U
Other languages
Japanese (ja)
Other versions
JPH0117876Y2 (en
Inventor
勲 堀江
Original Assignee
日本電気ホームエレクトロニクス株式会社
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 日本電気ホームエレクトロニクス株式会社 filed Critical 日本電気ホームエレクトロニクス株式会社
Priority to JP14848982U priority Critical patent/JPS5956840U/en
Publication of JPS5956840U publication Critical patent/JPS5956840U/en
Application granted granted Critical
Publication of JPH0117876Y2 publication Critical patent/JPH0117876Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Noise Elimination (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 the drawing]

第１図は本考案の前提であるＣＡＴＶチューナのブロッ
クダイヤグラム、及び第２図は本考案のＣＡＴＶチュー
ナの入力回路を示す要部回路図である。 ２１・・・・・・ＵＨＦ帯域チューナ回路、２２・・・
・・・ＶＨＦ帯高域チューナ回路、２３・・・・・・Ｖ
ＨＦ帯低域チューナ回路、２′４・・・・・・ＵＨＦ帯
域動作電源端子、２９．３０・・・・・・ダイオード、
３１・・・・・・共通接続点、３４・・・・・・スイッ
チング手段（ダイオード）、３５・・・・・・貫通コン
デンサ。FIG. 1 is a block diagram of a CATV tuner, which is the premise of the present invention, and FIG. 2 is a main circuit diagram showing the input circuit of the CATV tuner of the present invention. 21...UHF band tuner circuit, 22...
...VHF band high frequency tuner circuit, 23......V
HF band low frequency tuner circuit, 2'4...UHF band operation power supply terminal, 29.30...Diode,
31... Common connection point, 34... Switching means (diode), 35... Feedthrough capacitor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ＶＨＦ帯高域及びＶＨＦ’帯低域帯具域ＬＴＨＦ帯域の
受信信号をそれぞれ独立したＲＦ増幅段、混合段及び局
部発振段を含むチューナ回路により処理し、前記ＶＨＦ
帯両域の異なる受信信号をそれぞれのチューナ回路の入
力側にダイオードを介挿しその導通により各チューナ回
路に結合するＣＡＴＶチューナにおいて、前記ＵＨＦ帯
域の動作電源端子及び前記各ダイオードの共通接続点間
にスイッチング手段を介挿して成り、ＵＨＦ帯の受信に
際し、前記スイッチング手段を導通させてＶＨＦ帯信号
による受信妨害を排除することを特徴とするＣＡＴＶチ
ューナの入力回路。The received signals in the VHF band high band and VHF' band low band band LTHF band are processed by tuner circuits including independent RF amplification stages, mixing stages, and local oscillation stages, and the VHF
In a CATV tuner in which received signals of different bands are coupled to each tuner circuit by inserting a diode on the input side of each tuner circuit and conducting the diode, there is a connection point between the operating power supply terminal of the UHF band and the common connection point of each of the diodes. 1. An input circuit for a CATV tuner, characterized in that the input circuit includes a switching means, and when receiving a UHF band, the switching means is made conductive to eliminate reception interference caused by a VHF band signal.
JP14848982U 1982-09-30 1982-09-30 CATV tuner input circuit Granted JPS5956840U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14848982U JPS5956840U (en) 1982-09-30 1982-09-30 CATV tuner input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14848982U JPS5956840U (en) 1982-09-30 1982-09-30 CATV tuner input circuit

Publications (2)

Publication Number Publication Date
JPS5956840U true JPS5956840U (en) 1984-04-13
JPH0117876Y2 JPH0117876Y2 (en) 1989-05-24

Family

ID=30329895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14848982U Granted JPS5956840U (en) 1982-09-30 1982-09-30 CATV tuner input circuit

Country Status (1)

Country Link
JP (1) JPS5956840U (en)

Also Published As

Publication number Publication date
JPH0117876Y2 (en) 1989-05-24

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