JPS6137638U - VHF tuner input circuit - Google Patents
VHF tuner input circuitInfo
- Publication number
- JPS6137638U JPS6137638U JP12344084U JP12344084U JPS6137638U JP S6137638 U JPS6137638 U JP S6137638U JP 12344084 U JP12344084 U JP 12344084U JP 12344084 U JP12344084 U JP 12344084U JP S6137638 U JPS6137638 U JP S6137638U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- vhf tuner
- input circuit
- vhf
- input
- 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.)
- Pending
Links
Landscapes
- Filters And Equalizers (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Noise Elimination (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案に係るＶＨＦチューナの入力回路の要部
回路図、第２図は第１図の他の具体的回路図、第３図は
従来の一路図、第４図はＶＨＦチューナ入力レスポンス
特・旧、第５図はイメージ妨害特性図、及び第６図はア
ンテナ電圧特性図である。
１１・・・・・・入力端子、１２，３２・・・・・・帯
域フィルタ回路、１３・・・・・・入力段同調回路、１
６．３７・・・・・・コイル、１９．３８・・・・・・
可変容量ダイオード、２０．３９・・・・・・可変形ト
ラップ回路。Fig. 1 is a circuit diagram of the main part of the input circuit of a VHF tuner according to the present invention, Fig. 2 is another specific circuit diagram of Fig. 1, Fig. 3 is a conventional circuit diagram, and Fig. 4 is a VHF tuner input circuit. Response special/old, FIG. 5 is an image disturbance characteristic diagram, and FIG. 6 is an antenna voltage characteristic diagram. 11... Input terminal, 12, 32... Bandpass filter circuit, 13... Input stage tuning circuit, 1
6.37... Coil, 19.38...
Variable capacitance diode, 20.39...Variable trap circuit.
Claims (1)
過させて入力段同調回路に結合するＶＨＦチューナにお
いて、 前記帯域フィルタ回路に選局チャンネルに応じてトラッ
プ周波数を変化させる可変形トラップ回路を挿入し、選
択特性における高城側減衰度を増大させることを特徴と
するＶＨＦチューナの入力回路。[Claims for Utility Model Registration] In a VHF tuner that passes an input signal from a VHF input terminal through a bandpass filter circuit and couples it to an input stage tuning circuit, the bandpass filter circuit changes the trap frequency according to the selected channel. An input circuit for a VHF tuner, characterized in that a variable trap circuit is inserted to increase attenuation on the Takagi side in selection characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12344084U JPS6137638U (en) | 1984-08-11 | 1984-08-11 | VHF tuner input circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12344084U JPS6137638U (en) | 1984-08-11 | 1984-08-11 | VHF tuner input circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6137638U true JPS6137638U (en) | 1986-03-08 |
Family
ID=30682191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12344084U Pending JPS6137638U (en) | 1984-08-11 | 1984-08-11 | VHF tuner input circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6137638U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5246709A (en) * | 1975-10-11 | 1977-04-13 | Toshiba Corp | Signal receiving equipment |
-
1984
- 1984-08-11 JP JP12344084U patent/JPS6137638U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5246709A (en) * | 1975-10-11 | 1977-04-13 | Toshiba Corp | Signal receiving equipment |
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