JPS6416745U - - Google Patents
Info
- Publication number
- JPS6416745U JPS6416745U JP11097087U JP11097087U JPS6416745U JP S6416745 U JPS6416745 U JP S6416745U JP 11097087 U JP11097087 U JP 11097087U JP 11097087 U JP11097087 U JP 11097087U JP S6416745 U JPS6416745 U JP S6416745U
- Authority
- JP
- Japan
- Prior art keywords
- band
- switch
- broadcasting
- short
- circuit
- 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
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000007257 malfunction Effects 0.000 claims description 2
- 230000003321 amplification Effects 0.000 claims 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 239000004065 semiconductor Substances 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 2
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
図は本考案の一実施例を示すものである。
２…第１アンテナコイル、３…第２アンテナコ
イル、４…ＦＭフロントエンド、５…ＩＣ、７…
スイツチ回路、１５，１６，１７，１８…スイツ
チ、１９…バリコン、２０…阻止手段となる抵抗
、２１…誤動作防止手段となる直流カツト用コン
デンサ。
The figure shows one embodiment of the present invention. 2...First antenna coil, 3...Second antenna coil, 4...FM front end, 5...IC, 7 ...
Switch circuit, 15, 16, 17, 18... switch, 19... variable capacitor, 20... resistor serving as blocking means, 21... capacitor for direct current cut serving as means for preventing malfunction.
Claims (1)
ド放送を受信し得ると共にＦＭ及びＡＭ中間周波
増幅回路部を含む集積回路を共用するようにした
複数バンド受信機において、中波バンド放送に対
応して設けられた第１アンテナコイルと、短波バ
ンド放送に対応して設けられた第２アンテナコイ
ルと、バンド切換スイツチに応答して非選択バン
ドのアンテナコイルを短絡するスイツチと、該ス
イツチの操作に関連して前記中間周波増幅回路の
動作態様を切換える半導体スイツチング素子を含
むスイツチ回路と、中波バンド受信時、前記スイ
ツチにて前記第１アンテナコイルが短絡されるの
を阻止する阻止手段と、ＦＭバンド受信時、前記
スイツチ回路が誤動作するのを防止する手段とを
設けたことを特徴とする複数バンド受信機。 In a multi-band receiver capable of receiving FM band broadcasting, medium wave band broadcasting, and short wave band broadcasting and sharing an integrated circuit including FM and AM intermediate frequency amplification circuit sections, a multi-band receiver is provided corresponding to medium wave band broadcasting. a first antenna coil provided for short-wave band broadcasting, a second antenna coil provided corresponding to shortwave band broadcasting, a switch for short-circuiting antenna coils for non-selected bands in response to a band changeover switch, and a switch related to the operation of the switch. a switch circuit including a semiconductor switching element that switches the operation mode of the intermediate frequency amplification circuit by using the switch circuit, a blocking means that prevents the first antenna coil from being short-circuited by the switch when receiving the intermediate frequency band; and an FM band receiving circuit. 1. A multi-band receiver comprising means for preventing the switch circuit from malfunctioning when the switch circuit malfunctions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11097087U JPS6416745U (en) | 1987-07-20 | 1987-07-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11097087U JPS6416745U (en) | 1987-07-20 | 1987-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6416745U true JPS6416745U (en) | 1989-01-27 |
Family
ID=31348611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11097087U Pending JPS6416745U (en) | 1987-07-20 | 1987-07-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6416745U (en) |
-
1987
- 1987-07-20 JP JP11097087U patent/JPS6416745U/ja active Pending
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