JPH01146632U - - Google Patents

Info

Publication number
JPH01146632U
JPH01146632U JP1988043387U JP4338788U JPH01146632U JP H01146632 U JPH01146632 U JP H01146632U JP 1988043387 U JP1988043387 U JP 1988043387U JP 4338788 U JP4338788 U JP 4338788U JP H01146632 U JPH01146632 U JP H01146632U
Authority
JP
Japan
Prior art keywords
coil
band
antenna
tuner
pass filter
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
JP1988043387U
Other languages
Japanese (ja)
Other versions
JPH0631789Y2 (en
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 filed Critical
Priority to JP1988043387U priority Critical patent/JPH0631789Y2/en
Publication of JPH01146632U publication Critical patent/JPH01146632U/ja
Application granted granted Critical
Publication of JPH0631789Y2 publication Critical patent/JPH0631789Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Noise Elimination (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Description

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

第１図は本考案に係るアンテナ入力回路の一実
施例を示す回路図、第２図及び第３図は実施例を
説明するための交流等価回路図、第４図は第１図
に示す回路の特性を説明するための特性図である
。 １……ロツドアンテナ、Ｃ１，Ｃ２，Ｃ３……
コンデンサ、Ｌ１，Ｌ２……コイル、Ｄ……ダイ
オード、Ｑ……トランジスタ、Ｒ１，Ｒ２，Ｒ３
，Ｒ４……抵抗。 Fig. 1 is a circuit diagram showing an embodiment of the antenna input circuit according to the present invention, Figs. 2 and 3 are AC equivalent circuit diagrams for explaining the embodiment, and Fig. 4 is the circuit shown in Fig. 1. FIG. 2 is a characteristic diagram for explaining the characteristics of 1... Rod antenna, C1, C2, C3...
Capacitor, L1, L2...Coil, D...Diode, Q...Transistor, R1, R2, R3
, R4...Resistance.

Claims (1)

【実用新案登録請求の範囲】 ロツドアンテナに誘起したＲＦ信号をＴＶチユ
ーナのＲＦ入力端に導くアンテナ入力回路におい
て、 前記ロツドアンテナからの信号のうちＶＨＦ帯
以下の周波数の信号を除去するハイパスフイルタ
と、 このハイパスフイルタと前記ＴＶチユーナのＲ
Ｆ入力端との間に接続するイメージトラツプ用の
コイルと、 このコイルに並列接続されＶＨＦハイチヤンネ
ル帯及びＵＨＦ帯受信時においてはオンし、ＶＨ
Ｆローチヤンネル帯受信時においてはオフしこの
ときの容量により前記コイルとイメージトラツプ
回路を構成するダイオードとを具備したことを特
徴とするアンテナ入力回路。[Claims for Utility Model Registration] In an antenna input circuit that guides an RF signal induced in a rod antenna to an RF input terminal of a TV tuner, a high-pass filter that removes signals of frequencies below the VHF band from among the signals from the rod antenna; High pass filter and R of the TV tuner
An image trap coil connected between the F input terminal and this coil are connected in parallel and turn on when receiving VHF high channel band and UHF band.
1. An antenna input circuit comprising a diode which is turned off when receiving an F low channel band, and whose capacitance at this time constitutes the coil and an image trap circuit.
JP1988043387U 1988-03-30 1988-03-30 Antenna input circuit Expired - Lifetime JPH0631789Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988043387U JPH0631789Y2 (en) 1988-03-30 1988-03-30 Antenna input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988043387U JPH0631789Y2 (en) 1988-03-30 1988-03-30 Antenna input circuit

Publications (2)

Publication Number Publication Date
JPH01146632U true JPH01146632U (en) 1989-10-09
JPH0631789Y2 JPH0631789Y2 (en) 1994-08-22

Family

ID=31269786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988043387U Expired - Lifetime JPH0631789Y2 (en) 1988-03-30 1988-03-30 Antenna input circuit

Country Status (1)

Country Link
JP (1) JPH0631789Y2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997038525A1 (en) * 1996-04-04 1997-10-16 Sony Corporation Television receiver
JP2011035505A (en) * 2009-07-30 2011-02-17 Sony Ericsson Mobile Communications Ab Antenna device, broadcast receiving device, and compound wireless device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997038525A1 (en) * 1996-04-04 1997-10-16 Sony Corporation Television receiver
JP2011035505A (en) * 2009-07-30 2011-02-17 Sony Ericsson Mobile Communications Ab Antenna device, broadcast receiving device, and compound wireless device

Also Published As

Publication number Publication date
JPH0631789Y2 (en) 1994-08-22

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