JPS59183051U

JPS59183051U - Multi-band receiver antenna circuit

Info

Publication number: JPS59183051U
Application number: JP7630583U
Authority: JP
Inventors: 島田　倍満
Original assignee: 三洋電機株式会社
Priority date: 1983-05-20
Filing date: 1983-05-20
Publication date: 1984-12-06

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来の複数バンド受信機のアンテナ回路を示す
回路図、第２図はブツシュ型切換スイッチの設定位置を
表示するための回路図、第３図は来者実業の一実施例を
示す回路図、第４図イ９口は中波バンド受信時及び短波
バンド受信時に於ける第３図の等節回略図、第５図は本
考案の他の実施例を示す回路図である。Ｌ□・・・・・・短波バンド用アンテナコイル、”２・
・・・・・中波バンド用アンテナコイル、１□−□、１
２２・・・・・・中波バンド用アンテナコイルの１次側
巻線及び２次（ＩＲ線、Ｓ２・・・・・・バンド切換ス
イッチ、Ｑ□・・・・・・ス　　　　−イツチングトラ
ンジスタ。Fig. 1 is a circuit diagram showing the antenna circuit of a conventional multi-band receiver, Fig. 2 is a circuit diagram for displaying the setting position of a bush type changeover switch, and Fig. 3 is an example of an embodiment of a conventional multi-band receiver. The circuit diagram in FIG. 4A is a schematic diagram of FIG. 3 during medium wave band reception and short wave band reception, and FIG. 5 is a circuit diagram showing another embodiment of the present invention. L□・・・・・・Antenna coil for short wave band, “2・
...Antenna coil for medium wave band, 1□-□, 1
22...Primary winding and secondary winding of medium wave band antenna coil (IR wire, S2...Band selection switch, Q□...Switching transistor .

Claims

[Scope of utility model registration request]

(1) In a multi-band receiver having at least first and second bands, a switch for short-circuiting the primary winding of the antenna coil for the second band when receiving the first band; an antenna circuit for a multi-band receiver, comprising: a semiconductor switching element that is controlled and short-circuits a secondary winding of the second band antenna coil when receiving a first pad;

(2) The antenna circuit for a multi-band receiver according to claim 1, wherein the first band is a short wave band and the second band is a medium wave band.