JPS637817U - - Google Patents
Info
- Publication number
- JPS637817U JPS637817U JP10001986U JP10001986U JPS637817U JP S637817 U JPS637817 U JP S637817U JP 10001986 U JP10001986 U JP 10001986U JP 10001986 U JP10001986 U JP 10001986U JP S637817 U JPS637817 U JP S637817U
- Authority
- JP
- Japan
- Prior art keywords
- switching element
- tuning
- tuner
- electronically
- tuning circuits
- 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
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来の電子同調チユーナの回路図、第３図は
第２図における問題点を説明するためのＴＶセツ
トの接続例を示すブロツク図である。
１……電子同調チユーナ、２……アンテナ接続
部、３……入力フイルタ、４……バンド切替ダイ
オード、５，６……バンド切替端子、７，８……
同調回路、９……同調電圧端子、１０……バツク
アツプ用端子、１１……バツク・アツプ・コント
ロール端子、１２……バツク・アツプ・コントロ
ール・トランジスタ、１３……バツク・アツプ・
コンデンサ、１４……バイアス抵抗、１５……逆
流防止ダイオード、１６……バイアス抵抗、１７
……バツク・アツプ装置。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
FIG. 3 is a circuit diagram of a conventional electronic tuning tuner, and FIG. 3 is a block diagram showing an example of connection of a TV set to explain the problem in FIG. 2. 1...Electronic tuning tuner, 2...Antenna connection section, 3...Input filter, 4...Band switching diode, 5, 6...Band switching terminal, 7, 8...
Tuning circuit, 9... Tuning voltage terminal, 10... Backup terminal, 11... Backup control terminal, 12... Backup control transistor, 13... Backup control transistor.
Capacitor, 14...Bias resistor, 15...Reverse current prevention diode, 16...Bias resistor, 17
...back up device.
Claims (1)
アンテナ同調回路を有し、この同調回路をスイツ
チング素子で電子的に切替える電子同調チユーナ
において、電源が遮断された時に前記スイツチン
グ素子に逆方向電圧を印加することを特徴とする
電子同調チユーナ。 In an electronically tuned tuner which has a plurality of antenna tuning circuits connected to a single antenna input section and which electronically switches the tuning circuits using a switching element, a reverse voltage is applied to the switching element when the power is cut off. An electronic tuning tuner characterized by applying .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10001986U JPS637817U (en) | 1986-06-30 | 1986-06-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10001986U JPS637817U (en) | 1986-06-30 | 1986-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS637817U true JPS637817U (en) | 1988-01-19 |
Family
ID=30969438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10001986U Pending JPS637817U (en) | 1986-06-30 | 1986-06-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS637817U (en) |
-
1986
- 1986-06-30 JP JP10001986U patent/JPS637817U/ja active Pending
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