JPS6316717U - - Google Patents
Info
- Publication number
- JPS6316717U JPS6316717U JP10967986U JP10967986U JPS6316717U JP S6316717 U JPS6316717 U JP S6316717U JP 10967986 U JP10967986 U JP 10967986U JP 10967986 U JP10967986 U JP 10967986U JP S6316717 U JPS6316717 U JP S6316717U
- Authority
- JP
- Japan
- Prior art keywords
- tuner
- uhf
- supply terminal
- switching
- diode
- 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
- 230000002265 prevention Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Description
第１図は本考案に係るＴＶ用電子チユーナの実
施例を示す要部回路図、第２図は第１図の回路の
具体的構成を示すＶＨＦチユーナのアンテナ及び
段間同調回路図、第３図はＶＨＦチユーナの基本
同調回路図、第４図は従来のＶＨＦチユーナのア
ンテナ及び段間同調回路の各スイツチングダイオ
ードの回路図である。
ＳＤ……スイツチングダイオード（バンド切換
手段）、Ｄ……逆流防止用ダイオード、ＢＳ……
スイツチング電圧供給端子、ＢＵ……ＵＨＦチユ
ーナ用電源端子。
FIG. 1 is a main circuit diagram showing an embodiment of a TV electronic tuner according to the present invention, FIG. 2 is a VHF tuner antenna and interstage tuning circuit diagram showing a specific configuration of the circuit in FIG. 1, and FIG. The figure is a basic tuning circuit diagram of a VHF tuner, and FIG. 4 is a circuit diagram of each switching diode of the antenna and interstage tuning circuit of a conventional VHF tuner. SD... Switching diode (band switching means), D... Backflow prevention diode, BS...
Switching voltage supply terminal, BU...Power supply terminal for UHF tuner.
Claims (1)
ＨＦ受信帯のロウバウンドとハイバンドの切換手
段を有するＵＨＦ―ＶＨＦ電子チユーナにおいて
、上記切換手段の電圧供給端子とＵＨＦチユーナ
部用電源端子とをＵＨＦ受信時に前記スイツチン
グダイオードに対しバイアス電圧を付与するよう
逆流防止用ダイオードを介して接続したことを特
徴とする電子チユーナ。 V due to the voltage applied to the switching diode
In a UHF-VHF electronic tuner having a switching means for low-bound and high-band HF receiving bands, a voltage supply terminal of the switching means and a power supply terminal for the UHF tuner section are connected to apply a bias voltage to the switching diode during UHF reception. An electronic tuner characterized in that the tuner is connected via a backflow prevention diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10967986U JPS6316717U (en) | 1986-07-17 | 1986-07-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10967986U JPS6316717U (en) | 1986-07-17 | 1986-07-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6316717U true JPS6316717U (en) | 1988-02-03 |
Family
ID=30987995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10967986U Pending JPS6316717U (en) | 1986-07-17 | 1986-07-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6316717U (en) |
-
1986
- 1986-07-17 JP JP10967986U patent/JPS6316717U/ja active Pending
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