JPS6448938U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

図は本考案の一実施例を示すものである。 ５……交通情報放送受信部、８……レベル検出
回路、９……第１レベル検出回路、１０……第２
レベル検出回路、１２……切換信号発生回路、１
３……第１スイツチ回路、１５……低周波増幅回
路。 The figure shows an embodiment of the present invention. 5...Traffic information broadcast receiving section, 8...Level detection circuit, 9...First level detection circuit, 10...Second level detection circuit
Level detection circuit, 12...Switching signal generation circuit, 1
3...First switch circuit, 15...Low frequency amplification circuit.

Claims (1)

【実用新案登録請求の範囲】 (1) 中波放送帯の上限近傍の二つの周波数にお
いて放送される交通情報を受信し得るラジオ受信
機であつて、前記交通情報放送を受信するための
交通情報放送受信部と、この受信部にて受信され
た放送信号のレベルを検出するレベル検出回路と
、このレベル検出回路からの検出信号にて制御さ
れ、動作時前記受信部を前記二つの周波数に交互
に同調せしめるための切換信号を発生する切換信
号発生回路と、前記レベル検出回路からの検出信
号に基づき前記受信部にて受信された信号を低周
波信号増幅回路に供給するよう制御されるスイツ
チ回路とを具備したことを特徴とするラジオ受信
機。 (2) レベル検出回路が、第１の検出レベルを有
する第１レベル検出回路と、前記第１の検出レベ
ルより大なる第２の検出レベルを有する第２レベ
ル検出回路とよりなり、第１レベル検出回路から
の検出信号にて切換信号発生回路を制御すると共
に第２レベル検出回路からの検出信号にてスイツ
チ回路を制御するようになされていることを特徴
とする実用新案登録請求の範囲第１項記載のラジ
オ受信機。[Claims for Utility Model Registration] (1) A radio receiver capable of receiving traffic information broadcast on two frequencies near the upper limit of a medium wave broadcasting band, the traffic information for receiving said traffic information broadcast. A broadcast receiving section, a level detection circuit that detects the level of the broadcast signal received by this receiving section, and a detection signal from this level detection circuit that controls the receiving section alternately between the two frequencies during operation. a switching signal generation circuit that generates a switching signal for tuning to the level detection circuit; and a switch circuit that is controlled to supply the signal received by the receiving section to the low frequency signal amplification circuit based on the detection signal from the level detection circuit. A radio receiver comprising: (2) The level detection circuit includes a first level detection circuit having a first detection level and a second level detection circuit having a second detection level higher than the first detection level, and Utility model registration claim 1, characterized in that a switching signal generation circuit is controlled by a detection signal from a detection circuit, and a switch circuit is controlled by a detection signal from a second level detection circuit. Radio receiver as described in section.