JPH0455843U - - Google Patents
Info
- Publication number
- JPH0455843U JPH0455843U JP9810890U JP9810890U JPH0455843U JP H0455843 U JPH0455843 U JP H0455843U JP 9810890 U JP9810890 U JP 9810890U JP 9810890 U JP9810890 U JP 9810890U JP H0455843 U JPH0455843 U JP H0455843U
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- antennas
- diodes
- output terminal
- substrate
- 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
Description
第１図は本考案の一実施例の回路図、第２図は
実施例の要部構成図、第３図は車載ＴＶ用受信シ
ステムのブロツク図、第４図はＲＦ信号切換部の
ブロツク図、第５図はＲＦ信号切換部の具体的な
回路図である。
１，２，３，４……アンテナ、５……ＲＦスイ
ツチ、６……ＥＴチユーナ、３０……スイツチ制
御回路、４０……ハイブリツドＩＣ、５０……基
板、６０……共通導体、Ｃ１，Ｃ２，Ｃ３，Ｃ４
，Ｃ５，Ｃ１１，Ｃ１２，Ｃ１３，Ｃ１４，Ｃ１
５……コンデンサ、Ｄ１，Ｄ２，Ｄ３，Ｄ４……
ダイオード、Ｌ１，Ｌ２，Ｌ３，Ｌ４，Ｌ５……
チヨークコイル、Ｒ１１，Ｒ１２，Ｒ１３，Ｒ１
４，Ｒ１５……抵抗。
Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is a main part configuration diagram of the embodiment, Fig. 3 is a block diagram of an in-vehicle TV receiving system, and Fig. 4 is a block diagram of an RF signal switching section. , FIG. 5 is a specific circuit diagram of the RF signal switching section. 1, 2, 3, 4...Antenna, 5...RF switch, 6...ET tuner, 30...Switch control circuit, 40...Hybrid IC, 50...Substrate, 60...Common conductor, C1, C2 ,C3,C4
, C5, C11, C12, C13, C14, C1
5... Capacitor, D1, D2, D3, D4...
Diode, L1, L2, L3, L4, L5...
Chi York coil, R11, R12, R13, R1
4, R15...Resistance.
Claims (1)
自動的に選択するアンテナダイバシテイシステム
のＲＦスイツチにおいて、複数のダイオードを同
一基板内に収納し、前記基板に、前記複数のアン
テナの入力信号が各々供給されるとともに該複数
のアンテナ入力を選択する制御信号が各々入力さ
れる複数の入力端子と、バイアス電圧が印加され
るとともに選択されたアンテナ入力信号を出力す
る出力端子とを設け、前記複数のダイオードのア
ノードを、共通の導体を介して前記出力端子に接
続し、前記複数のダイオードの各カソードを前記
複数の入力端子に各々接続したことを特徴とする
ＲＦ信号切換ユニツト。 In an RF switch for an antenna diversity system that automatically selects an antenna with the maximum output from a plurality of antennas at all times, a plurality of diodes are housed in the same substrate, and the input signals of the plurality of antennas are respectively supplied to the substrate. and an output terminal to which a bias voltage is applied and which outputs the selected antenna input signal; An RF signal switching unit characterized in that an anode is connected to the output terminal via a common conductor, and each cathode of the plurality of diodes is connected to the plurality of input terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9810890U JPH0455843U (en) | 1990-09-20 | 1990-09-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9810890U JPH0455843U (en) | 1990-09-20 | 1990-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0455843U true JPH0455843U (en) | 1992-05-13 |
Family
ID=31839030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9810890U Pending JPH0455843U (en) | 1990-09-20 | 1990-09-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0455843U (en) |
-
1990
- 1990-09-20 JP JP9810890U patent/JPH0455843U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7609127B2 (en) | Electronically controllable RF switch | |
| JPH11205700A (en) | Double tuning circuit | |
| US5270579A (en) | Circuit arrangement for generating an inverse voltage for switching diodes | |
| US6512409B2 (en) | Signal switching circuit with reduced number of diodes used | |
| JPS63114542U (en) | ||
| KR910001426Y1 (en) | Multi-channel tuner | |
| JPS6232843B2 (en) | ||
| JPH0270131A (en) | Vehicle mounted tv receiver | |
| JP3096602B2 (en) | Electronic tuning tuner | |
| JPS6122382Y2 (en) | ||
| JPH0237141B2 (en) | SHINGOKIRIKAESOCHI | |
| JPS62133484U (en) | ||
| EP1522186B1 (en) | Television receiver with isolated inputs | |
| JPH0730825A (en) | Broadcast receiver tuner input circuit | |
| JPS6119220A (en) | Channel selecting device | |
| JPS58994Y2 (en) | antenna switching device | |
| JPS6126338U (en) | active antenna | |
| JPS58184833A (en) | Composite radio device | |
| JPH03115440U (en) | ||
| JPS6356835U (en) | ||
| JPS5957045U (en) | antenna switching circuit | |
| JPH04126434U (en) | diversity receiver | |
| JPH0436336U (en) | ||
| JPS5848520A (en) | Electronic tuner for television receiver | |
| JPS593668U (en) | Television receiver channel selection device |