JPH0436336U - - Google Patents
Info
- Publication number
- JPH0436336U JPH0436336U JP7798390U JP7798390U JPH0436336U JP H0436336 U JPH0436336 U JP H0436336U JP 7798390 U JP7798390 U JP 7798390U JP 7798390 U JP7798390 U JP 7798390U JP H0436336 U JPH0436336 U JP H0436336U
- Authority
- JP
- Japan
- Prior art keywords
- coil
- switch diode
- parallel
- series
- switch
- 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 7
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
第１図乃至第３図は本考案の一実施例を示し、
第１図は入力同調回路の回路図、第２図は同回路
の高バンド受信状態における等価回路図、第３図
は他の実施例を示す入力同調回路の回路図である
。第４図乃至第６図は従来例を示し、第４図は入
力同調回路の回路図、第５図は同回路の低バンド
受信状態の等価回路図、第６図は高バンド受信状
態における等価回路図である。
１０……入力同調回路、１１……アンテナ入力
端子、１２……出力端子、１３……バンド切換端
子、１４……同調電圧端子、Ｌ１，Ｌ２，Ｌ３，
Ｌ４……コイル、Ｄ２，Ｄ３……スイツチダイオ
ード。
1 to 3 show an embodiment of the present invention,
FIG. 1 is a circuit diagram of an input tuning circuit, FIG. 2 is an equivalent circuit diagram of the same circuit in a high band reception state, and FIG. 3 is a circuit diagram of an input tuning circuit showing another embodiment. Figures 4 to 6 show conventional examples, Figure 4 is a circuit diagram of the input tuning circuit, Figure 5 is an equivalent circuit diagram of the same circuit in a low band reception state, and Figure 6 is an equivalent circuit diagram in a high band reception state. It is a circuit diagram. 10...Input tuning circuit, 11...Antenna input terminal, 12...Output terminal, 13...Band switching terminal, 14...Tuning voltage terminal, L1 , L2 , L3 ,
L4 ...Coil, D2 , D3 ...Switch diode.
Claims (1)
直列と並列とに接続し、前記直列コイル並びに並
列コイルの出力端をスイツチダイオードによつて
接続し、該スイツチダイオードに印加する電圧に
よつて、前記直列コイル並びに並列コイルを短絡
して高バンド電波の同調を行う電子チユーナの入
力同調回路において、前記スイツチダイオードと
アンテナ入力端子とを第２のスイツチダイオード
によつて接続し、前記２つのスイツチダイオード
をバンド切換電圧によつて同時にオン／オフする
ように構成したことを特徴とする電子チユーナの
入力同調回路。 Coils for low band tuning are connected in series and parallel to the antenna input terminal, the output ends of the series coil and the parallel coil are connected by a switch diode, and the voltage applied to the switch diode is used to tune the series coil and the parallel coil. In an input tuning circuit for an electronic tuner that tunes high-band radio waves by shorting a coil and a parallel coil, the switch diode and the antenna input terminal are connected by a second switch diode, and the two switch diodes are connected to the band. 1. An input tuning circuit for an electronic tuner, characterized in that it is configured to turn on and off simultaneously depending on a switching voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7798390U JPH0436336U (en) | 1990-07-23 | 1990-07-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7798390U JPH0436336U (en) | 1990-07-23 | 1990-07-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0436336U true JPH0436336U (en) | 1992-03-26 |
Family
ID=31620859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7798390U Pending JPH0436336U (en) | 1990-07-23 | 1990-07-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0436336U (en) |
-
1990
- 1990-07-23 JP JP7798390U patent/JPH0436336U/ja active Pending
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