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
Links
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Noise Elimination (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
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)
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.
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)
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 |
-
1988
- 1988-03-30 JP JP1988043387U patent/JPH0631789Y2/en not_active Expired - Lifetime
Cited By (2)
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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