JPH0186336U - - Google Patents
Info
- Publication number
- JPH0186336U JPH0186336U JP18132487U JP18132487U JPH0186336U JP H0186336 U JPH0186336 U JP H0186336U JP 18132487 U JP18132487 U JP 18132487U JP 18132487 U JP18132487 U JP 18132487U JP H0186336 U JPH0186336 U JP H0186336U
- Authority
- JP
- Japan
- Prior art keywords
- band
- capacitor
- tuning
- coil
- 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
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
- Noise Elimination (AREA)
Description
第１図は本考案に係る電子チユーナの入力同調
回路図、第２図は従来の電子チユーナの入力同調
回路図である。
２１……ローチヤンネル用同調コイル、２２…
…ハイチヤンネル用同調コイル、２３……第１の
コンデンサ、２４……コイル、２５……第２のコ
ンデンサ、２６……スイツチングダイオード。
FIG. 1 is an input tuning circuit diagram of an electronic tuner according to the present invention, and FIG. 2 is an input tuning circuit diagram of a conventional electronic tuner. 21...Low channel tuning coil, 22...
... Tuning coil for Haiti channel, 23... First capacitor, 24... Coil, 25... Second capacitor, 26... Switching diode.
Claims (1)
ンドをスイツチングダイオードの導通及び遮断に
より各バンド用同調コイルを切換えてバンド選択
する電子チユーナの入力同調段において、前記各
バンド用同調コイルはＲＦ信号入力端子とＲＦ増
幅素子間に直列に接続すると共に前記入力端子と
接地間に第１のコンデンサ、コイルおよび第２の
コンデンサの直列回路を配置し、この直列回路の
各部品定数をイメージ周波数に選定しイメージト
ラツプとしたことを特徴とする電子チユーナの入
力同調回路。 (2) 前記第２のコンデンサの容量値を１８０〜
２２０ｐＦに選定してローチヤンネル受信時のハ
イチヤンネル妨害を抑止した実用新案登録請求の
範囲第１項に記載の電子チユーナの入力同調回路
。[Claims for Utility Model Registration] (1) In an input tuning stage of an electronic tuner that selects a band by switching a tuning coil for each band between a low channel band and a high channel band by conducting and cutting off a switching diode, The tuning coil is connected in series between the RF signal input terminal and the RF amplification element, and a series circuit of a first capacitor, a coil, and a second capacitor is arranged between the input terminal and ground, and each component constant of this series circuit is An input tuning circuit for an electronic tuner, characterized in that the image frequency is selected as an image trap. (2) Set the capacitance value of the second capacitor to 180~
The input tuning circuit for an electronic tuner according to claim 1, which is a utility model registration, wherein the input tuning circuit is selected to be 220 pF to suppress high channel interference during low channel reception.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18132487U JPH0186336U (en) | 1987-11-27 | 1987-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18132487U JPH0186336U (en) | 1987-11-27 | 1987-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0186336U true JPH0186336U (en) | 1989-06-07 |
Family
ID=31472809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18132487U Pending JPH0186336U (en) | 1987-11-27 | 1987-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0186336U (en) |
-
1987
- 1987-11-27 JP JP18132487U patent/JPH0186336U/ja active Pending
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