JPS6349822U - - Google Patents
Info
- Publication number
- JPS6349822U JPS6349822U JP14292986U JP14292986U JPS6349822U JP S6349822 U JPS6349822 U JP S6349822U JP 14292986 U JP14292986 U JP 14292986U JP 14292986 U JP14292986 U JP 14292986U JP S6349822 U JPS6349822 U JP S6349822U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- tuner
- switching diode
- tuner section
- coil
- 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 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- 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
図はその要部のＶＨＦ受信時での等価回路図、第
３図はその周波数特性を示す図、第４図は従来の
ＵＶ一体型チユーナの入力回路を示す回路図であ
る。
３……ＶＨＦチユーナ部、４……ＵＨＦチユー
ナ部、５……直列回路、Ｄ１，Ｄ２……第１第２
のスイツチングダイオード、Ｃ５……入力同調容
量。
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.
The figure is an equivalent circuit diagram of the main part during VHF reception, FIG. 3 is a diagram showing its frequency characteristics, and FIG. 4 is a circuit diagram showing the input circuit of a conventional UV integrated tuner. 3...VHF tuner section, 4...UHF tuner section, 5...Series circuit, D1 , D2 ...first second
switching diode, C 5 ...input tuning capacitance.
Claims (1)
ぞれ択一選択的にオン、オフする第１第２のスイ
ツチングダイオードを介して共通の入力端子に接
続されるチユーナに於いて、ＵＨＦチユーナ部の
入力同調容量に対して直列接続した前記第１のス
イツチングダイオードに、コイルと直流阻止コン
デンサの直列回路を並列接続し、前記第１のスイ
ツチングダイオードがオフの時に前記コイルと前
記同調容量とで妨害信号に対するトラツプ回路を
構成するようにしたことを特徴とするＵＶ一体型
チユーナの入力回路。 In a tuner in which the UHF tuner section and the VHF tuner section are connected to a common input terminal via first and second switching diodes that are selectively turned on and off, respectively, the input tuning capacitance of the UHF tuner section is A series circuit of a coil and a DC blocking capacitor is connected in parallel to the first switching diode, which is connected in series to the first switching diode, and when the first switching diode is off, the coil and the tuning capacitor trap the interference signal. An input circuit for a UV-integrated tuner, characterized in that the circuit is structured as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14292986U JPS6349822U (en) | 1986-09-18 | 1986-09-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14292986U JPS6349822U (en) | 1986-09-18 | 1986-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6349822U true JPS6349822U (en) | 1988-04-04 |
Family
ID=31052132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14292986U Pending JPS6349822U (en) | 1986-09-18 | 1986-09-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6349822U (en) |
-
1986
- 1986-09-18 JP JP14292986U patent/JPS6349822U/ja active Pending
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