JPS6025250U - VHF tuner input circuit - Google Patents
VHF tuner input circuitInfo
- Publication number
- JPS6025250U JPS6025250U JP11541383U JP11541383U JPS6025250U JP S6025250 U JPS6025250 U JP S6025250U JP 11541383 U JP11541383 U JP 11541383U JP 11541383 U JP11541383 U JP 11541383U JP S6025250 U JPS6025250 U JP S6025250U
- Authority
- JP
- Japan
- Prior art keywords
- switching element
- input circuit
- vhf tuner
- inductance
- tuner 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
- 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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案の前提であるＶＨＦチューナ用入力回路
図、第２図及び第３図は第１図のハイ及びローバンド受
信時の高周波的等価回路図、第４図は本考案に係るＶＨ
Ｆチューナ入力回路図、及び第５図は第４図のローバン
ド受信時の高周波的等価回路図である。
１・・・・・・入力端子、３・・・・・・可変容量ダイ
オード、４・・・・・・ローチャンネルコイル、５・・
・・・・ハイチャンネルコイル、６・・・・・・スイッ
チングダイオード、３０・・・・・・ＦＭ信号トラップ
回路。Fig. 1 is an input circuit diagram for a VHF tuner which is the premise of the present invention, Figs. 2 and 3 are high frequency equivalent circuit diagrams during high and low band reception in Fig. 1, and Fig. 4 is a VHF tuner input circuit diagram according to the present invention.
An F tuner input circuit diagram, and FIG. 5 is a high frequency equivalent circuit diagram at the time of low band reception in FIG. 4. 1... Input terminal, 3... Variable capacitance diode, 4... Low channel coil, 5...
...High channel coil, 6...Switching diode, 30...FM signal trap circuit.
Claims (1)
ンス素子、及び前記ローチャンネル用インダクタンス素
子と高周波的に並列接続のスイッチング素子を具備する
入力段同調回路において、前記ローチャンネル用インダ
クタンス素子は直列接続の第１及び第２コイルを含み、
各一端側が高周波信号用入力端子に、また、各他端側が
前記スイッチング素子にそれぞれ接続され、前記スイッ
チング素子はＦＭ信号用トラップを経て接地され、この
スイッチング素子の遮断時にＦＭ信号を排除するように
したことを特徴とするＶＨＦチューナの入力回路。In an input stage tuned circuit comprising a variable capacitance element, an inductance element for high and low channels, and a switching element connected in parallel at high frequency with the inductance element for the low channel, the inductance element for the low channel is connected to the first and second inductance elements connected in series. including a second coil;
Each one end is connected to a high frequency signal input terminal, and the other end is connected to the switching element, and the switching element is grounded via an FM signal trap, so that the FM signal is eliminated when the switching element is cut off. This is an input circuit for a VHF tuner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11541383U JPS6025250U (en) | 1983-07-25 | 1983-07-25 | VHF tuner input circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11541383U JPS6025250U (en) | 1983-07-25 | 1983-07-25 | VHF tuner input circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6025250U true JPS6025250U (en) | 1985-02-20 |
Family
ID=30266424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11541383U Pending JPS6025250U (en) | 1983-07-25 | 1983-07-25 | VHF tuner input circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6025250U (en) |
-
1983
- 1983-07-25 JP JP11541383U patent/JPS6025250U/en active Pending
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