JPS5816944U - VHF electronic tuner - Google Patents
VHF electronic tunerInfo
- Publication number
- JPS5816944U JPS5816944U JP11283381U JP11283381U JPS5816944U JP S5816944 U JPS5816944 U JP S5816944U JP 11283381 U JP11283381 U JP 11283381U JP 11283381 U JP11283381 U JP 11283381U JP S5816944 U JPS5816944 U JP S5816944U
- Authority
- JP
- Japan
- Prior art keywords
- switching
- voltage
- band
- channel
- tuning circuit
- 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
- 241000231739 Rutilus rutilus Species 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
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図は本考案に係るＶＨＦ電子チューナの要部回路図
、及び第２図は第１図の特性図である。
３・・・・・・同調回路、４・・−−−−ＦＭ トラッ
プ回路、６・・・・・・可変容量ダイオード、７．８・
・曲ハイチャンネルコイル、９．１０・曲り一チャンネ
ルコイル、１１・・・・・・（第１の）スイッチングダ
イオード、２６・・・・・・（第２の）スイッチングダ
イオード、Ｓ□、ＳＷ工・・・・・・電圧端子。FIG. 1 is a circuit diagram of a main part of a VHF electronic tuner according to the present invention, and FIG. 2 is a characteristic diagram of FIG. 1. 3... Tuning circuit, 4...---FM trap circuit, 6... Variable capacitance diode, 7.8.
- Curved high channel coil, 9.10 - Curved one channel coil, 11... (first) switching diode, 26... (second) switching diode, S□, SW engineering・・・・・・Voltage terminal.
Claims (1)
ネル及びローチャンネノヒコイル、ローチ、ヤンネルコ
イルを交周波的に短絡してバンド選択させる第１のスイ
ッチングダイオード、及び選択するバンドに応じ所定の
スイッチング電圧をスイッチングダイオードに印加する
ハイチャンネル及びローチャンネル動作電圧端子を含む
入力同調回路と、この同調回路の入力側に取付けられた
第２のスイッチングダイオードを含むＦＭ信号のトラッ
プ回路とを具備し、ハイチャンネルバンドの選択に際し
前記動作電圧端子からの電圧により前記第１及び第２の
スイッチングダイオードを導通させて前記トラップ回路
をハイチャンネルバンド選択状態の入力同調回路に結合
してＲＦ受信信号に対するＦＭ信号の第２高調波による
妨害を阻止したことを特徴とするＶＨＦ電子チューナ。A variable capacitance diode to which a tuning voltage is applied, a first switching diode that selects a band by shorting the high channel and low channel Nohi coils, Roach and Jannel coils in an alternating frequency manner, and switches a predetermined switching voltage according to the selected band. It is equipped with an input tuning circuit including high channel and low channel operating voltage terminals to be applied to the diodes, and an FM signal trap circuit including a second switching diode attached to the input side of this tuning circuit. At the time of selection, the first and second switching diodes are made conductive by the voltage from the operating voltage terminal, and the trap circuit is coupled to the input tuning circuit in the high channel band selection state, thereby adjusting the second harmonic of the FM signal relative to the RF received signal. A VHF electronic tuner characterized by blocking interference caused by waves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11283381U JPS5816944U (en) | 1981-07-27 | 1981-07-27 | VHF electronic tuner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11283381U JPS5816944U (en) | 1981-07-27 | 1981-07-27 | VHF electronic tuner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5816944U true JPS5816944U (en) | 1983-02-02 |
Family
ID=29907147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11283381U Pending JPS5816944U (en) | 1981-07-27 | 1981-07-27 | VHF electronic tuner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5816944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0258415A (en) * | 1988-06-28 | 1990-02-27 | Telefunken Electronic Gmbh | Television tuner with band-pass filter circuit |
-
1981
- 1981-07-27 JP JP11283381U patent/JPS5816944U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0258415A (en) * | 1988-06-28 | 1990-02-27 | Telefunken Electronic Gmbh | Television tuner with band-pass filter circuit |
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