JPS60114450U - car radio - Google Patents
car radioInfo
- Publication number
- JPS60114450U JPS60114450U JP207184U JP207184U JPS60114450U JP S60114450 U JPS60114450 U JP S60114450U JP 207184 U JP207184 U JP 207184U JP 207184 U JP207184 U JP 207184U JP S60114450 U JPS60114450 U JP S60114450U
- Authority
- JP
- Japan
- Prior art keywords
- level detection
- circuit
- receiving circuit
- state
- detection signal
- 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
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
第１図は本考案の一実施例の構成ブロック図、第２図は
レベル信号りと受信電界レベルとの関係の一例を系す概
念図、第３図は第１図中のレベル −検出回路す
の構成の一例を示すブロック図、第４ ゛ −図は
レベル検出回路５や動作の一例を示す概念図である。
１・・１信アンテナ、２・・・分波器、３・・・路側通
信 −用受信回路、４・・・放送用受信回路、５・・
・レベル検□出回路、６・・・切替え回路、７・・・ス
ピーカー、１１・・・チューナ回路、１２・・・オーデ
ィオアンプ、１３・・・スイッチ駆動回路、１４・・・
スイッチ回路、１７・・・比較回路。Fig. 1 is a block diagram of the configuration of an embodiment of the present invention, Fig. 2 is a conceptual diagram showing an example of the relationship between the level signal and the received electric field level, and Fig. 3 is the level-detection circuit in Fig. 1. FIG. 4 is a conceptual diagram showing an example of the level detection circuit 5 and its operation. 1... 1-channel antenna, 2... Duplexer, 3... Receiving circuit for roadside communication, 4... Receiving circuit for broadcasting, 5...
・Level detection circuit, 6... switching circuit, 7... speaker, 11... tuner circuit, 12... audio amplifier, 13... switch drive circuit, 14...
Switch circuit, 17... comparison circuit.
Claims (1)
た路側通信用電波を増幅し復調する第１の受信回路、該
分波器から受けた放送用電波を増幅し復調する第２の受
信回路、前記第１の受信回路からその受信電界レベルを
表示する信号を受け゛ て該受信電界レベルが第１の
設定値以上に達したときにレベル検出信号を第１の状態
にすると共に−該受信電界レベルが第１の所定値よりも
低い第２の設定値まで低下した時に前記レベル検出信号
を第２．の状態にするレベル検出回路、該レベル検出回
路から受けたレベル検出信号が第１の状態にあるときは
前記第１の受信回路の出力をスピーカーに供給すると共
に該レベル検出信号が第２の状態にあるときは前記第２
の受信回路の出力を前記ス、 ビーカーに供給する
切替え回路及び該切替え回路による前記第１の受信回路
の出力のスピーカーへ −の供給動作を必要に応じ
て無効にする手段を備えたことを特徴とするカーラジオ
。A branching filter connected to the receiving antenna, a first receiving circuit that amplifies and demodulates the roadside communication radio waves received from the branching filter, and a second receiving circuit that amplifies and demodulates the broadcasting radio waves received from the branching filter. The receiving circuit receives a signal indicating the received electric field level from the first receiving circuit and sets the level detection signal to the first state when the received electric field level reaches a first set value or more. - When the received electric field level decreases to a second predetermined value lower than the first predetermined value, the level detection signal is transmitted to the second predetermined value. a level detection circuit that sets the level detection circuit to the state; when the level detection signal received from the level detection circuit is in the first state, the output of the first receiving circuit is supplied to the speaker, and the level detection signal is set to the second state; , the second
A switching circuit for supplying the output of the first receiving circuit to the first beaker, and means for disabling the switching circuit's operation of supplying the output of the first receiving circuit to the speaker, as necessary. car radio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP207184U JPS60114450U (en) | 1984-01-11 | 1984-01-11 | car radio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP207184U JPS60114450U (en) | 1984-01-11 | 1984-01-11 | car radio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60114450U true JPS60114450U (en) | 1985-08-02 |
Family
ID=30475401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP207184U Pending JPS60114450U (en) | 1984-01-11 | 1984-01-11 | car radio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60114450U (en) |
-
1984
- 1984-01-11 JP JP207184U patent/JPS60114450U/en active Pending
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