JPS63198234U - - Google Patents
Info
- Publication number
- JPS63198234U JPS63198234U JP8946387U JP8946387U JPS63198234U JP S63198234 U JPS63198234 U JP S63198234U JP 8946387 U JP8946387 U JP 8946387U JP 8946387 U JP8946387 U JP 8946387U JP S63198234 U JPS63198234 U JP S63198234U
- Authority
- JP
- Japan
- Prior art keywords
- switching diode
- power supply
- supply terminal
- switching
- diode connected
- 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
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
Landscapes
- Superheterodyne Receivers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
第１図は本考案の電子同調チユーナの一実施例
を示す要部回路図、第２図は本考案による妨害排
除能力を示す特性図、第３図及び第４図はそれぞ
れ異なる従来例を示すチユーナの回路図、第５図
は従来のチユーナによる妨害排除能力を示す特性
図である。
７……ＶＨＦチユーナ部、６……ＵＨＦチユー
ナ部、ＵＢ……ＵＨＦ電源端子（第１電源供給端
子）、ＨＢ……ＶＨＦハイバンド、電源端子（第
２電源供給端子）、ｌ１，ｌ２……同調コイル、
Ｄ１，Ｄ２，Ｄ３……第１、第２、第３スイツチ
ングダイオード、Ｒ１……抵抗。
Fig. 1 is a main circuit diagram showing an embodiment of the electronic tuning tuner of the present invention, Fig. 2 is a characteristic diagram showing the interference rejection ability of the invention, and Figs. 3 and 4 show different conventional examples. The circuit diagram of the tuner, FIG. 5, is a characteristic diagram showing the interference elimination ability of the conventional tuner. 7...VHF tuner section, 6...UHF tuner section, UB...UHF power supply terminal (first power supply terminal), HB...VHF high band, power supply terminal (second power supply terminal), l 1 , l 2 ...tuned coil,
D1 , D2 , D3 ...first, second, third switching diodes, R1 ...resistance.
Claims (1)
る第１電源供給端子と、ＶＨＦハイバンド受信時
に電圧が印加される第２電源供給端子と、前記第
１電源供給端子を交流的に接地する手段と、ＶＨ
Ｆチユーナの入力同調コイルを切換えるべく該入
力同調コイルに接続された第１スイツチングダイ
オードと、この第１スイツチングダイオードと前
記第１電源供給端子との間に前記第１スイツチン
グダイオードと同じ向きに接続された第２スイツ
チングダイオードと、前記第１、第２スイツチン
グダイオードの接続点と前記第２電源供給端子の
間に前記第１スイツチングダイオードと同じ向き
に接続された第３スイツチダイオードと抵抗とか
らなる直列回路とを備えた電子同調チユーナ。 a first power supply terminal that applies voltage to the UHF tuner during UHF reception, a second power supply terminal to which voltage is applied during VHF high band reception, means for grounding the first power supply terminal AC-wise;
a first switching diode connected to the input tuning coil for switching the input tuning coil of the F tuner; and a switching diode connected between the first switching diode and the first power supply terminal in the same direction as the first switching diode. a second switching diode connected to the first switching diode, and a third switching diode connected in the same direction as the first switching diode between the connection point of the first and second switching diodes and the second power supply terminal. and a series circuit consisting of a resistor and a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8946387U JPS63198234U (en) | 1987-06-10 | 1987-06-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8946387U JPS63198234U (en) | 1987-06-10 | 1987-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63198234U true JPS63198234U (en) | 1988-12-20 |
Family
ID=30948466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8946387U Pending JPS63198234U (en) | 1987-06-10 | 1987-06-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63198234U (en) |
-
1987
- 1987-06-10 JP JP8946387U patent/JPS63198234U/ja active Pending
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