JPS6142128U - Automatic search sensitivity switching device for car radio receivers - Google Patents
Automatic search sensitivity switching device for car radio receiversInfo
- Publication number
- JPS6142128U JPS6142128U JP12781684U JP12781684U JPS6142128U JP S6142128 U JPS6142128 U JP S6142128U JP 12781684 U JP12781684 U JP 12781684U JP 12781684 U JP12781684 U JP 12781684U JP S6142128 U JPS6142128 U JP S6142128U
- Authority
- JP
- Japan
- Prior art keywords
- search sensitivity
- switching device
- search
- automatic
- sensitivity switching
- 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
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
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図は本考案のサーチ率度切換装置を有するＰＬＬシ
ンセサイザ方式を採用した車載用ラジオ受信機の要部ブ
ロック図、第２図は周波数掃引中に受信電波の有無を検
出する検出回路の構成例を示す電気回路図、第３図はＭ
ＰＵ３Ｑが行なうサーチ感度切換処理の一′例を示すフ
ローテヤートである。
１はラジオチューナ、２はＰＬＬ， ３はマイクロコン
ピュータシそテム、４３はスモールランプ、４４はスモ
ールランプスイッチ、４０はサーチキー、４１はサーチ
感度切換キー、４２はモードキ一である。Figure 1 is a block diagram of the main parts of an in-vehicle radio receiver that uses a PLL synthesizer system with a search rate switching device according to the present invention, and Figure 2 is a configuration of a detection circuit that detects the presence or absence of received radio waves during frequency sweep. Electrical circuit diagram showing an example, Figure 3 is M
This flowchart shows an example of search sensitivity switching processing performed by PU3Q. 1 is a radio tuner, 2 is a PLL, 3 is a microcomputer system, 43 is a small lamp, 44 is a small lamp switch, 40 is a search key, 41 is a search sensitivity switching key, and 42 is a mode key.
Claims (3)
させ得る周波数掃引手段と、該手段による掃引中に受信
電波の有無を検出する検出回路と、該検出回路の検出出
力に応答してサーチ処理を行なうサーチ処理手段と、前
記検出回路のサーチ感度を高、低に切換えるサーチ感度
切換信号を発生する手段とを具備した車載用ラジオ受信
機におけるサーチ感度自動切換装置において、照明ラン
プが点灯されているか否かを検出する検出回路と、照明
ランプ点灯時は前記サーチ感度切換信号によりサーチ感
度を低くし照明ランプ消灯時は前記サーチ感度切換信号
によりサーチ感度を高くする切換手段とを具備したこと
を特徴とする車載用ラジオ受信機におけるサーチ感度自
動切換装置。(1) A frequency sweep means that can continuously change the received frequency within a predetermined frequency range, a detection circuit that detects the presence or absence of received radio waves during sweeping by the means, and a frequency sweep means that responds to the detection output of the detection circuit. In an automatic search sensitivity switching device for an in-vehicle radio receiver, which includes a search processing means for performing search processing and a means for generating a search sensitivity switching signal for switching the search sensitivity of the detection circuit between high and low, an illumination lamp is turned on. a detection circuit for detecting whether or not the lighting lamp is on, and a switching means for lowering the search sensitivity using the search sensitivity switching signal when the lighting lamp is on and increasing the search sensitivity using the search sensitivity switching signal when the lighting lamp is turned off. An automatic search sensitivity switching device for an in-vehicle radio receiver, characterized by:
オ受信機におけるサーチ感度自動切換装置において、前
記照明ランプは自動車の夜間照明用ランプであることを
特徴とする車載用ラジオ受信機におけるサーチ感度自動
切換装置。(2) Jitsukawa patent registration scope In the automatic search sensitivity switching device for an in-vehicle radio receiver as set forth in claim 1, the illumination lamp is a lamp for night illumination of an automobile. Search sensitivity automatic switching device.
オ受信機におけるサーチ感度自動切換装置において、前
記照明ランプは車載用機器の照明ランプであることを特
徴とする車載用ラジオ受信機におけるサーチ感度自動切
換装置。(3) Scope of Utility Model Registration In the automatic search sensitivity switching device for a vehicle-mounted radio receiver according to claim 1, the lighting lamp is a lighting lamp of a vehicle-mounted device. Search sensitivity automatic switching device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12781684U JPS6142128U (en) | 1984-08-23 | 1984-08-23 | Automatic search sensitivity switching device for car radio receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12781684U JPS6142128U (en) | 1984-08-23 | 1984-08-23 | Automatic search sensitivity switching device for car radio receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6142128U true JPS6142128U (en) | 1986-03-18 |
Family
ID=30686447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12781684U Pending JPS6142128U (en) | 1984-08-23 | 1984-08-23 | Automatic search sensitivity switching device for car radio receivers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6142128U (en) |
-
1984
- 1984-08-23 JP JP12781684U patent/JPS6142128U/en active Pending
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