JPS643218U - - Google Patents
Info
- Publication number
- JPS643218U JPS643218U JP9446187U JP9446187U JPS643218U JP S643218 U JPS643218 U JP S643218U JP 9446187 U JP9446187 U JP 9446187U JP 9446187 U JP9446187 U JP 9446187U JP S643218 U JPS643218 U JP S643218U
- Authority
- JP
- Japan
- Prior art keywords
- detection unit
- frequency selectivity
- radio receiver
- frequency
- vehicle radio
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 1
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Circuits Of Receivers In General (AREA)
Description
第１図は本考案の車載用ラジオ受信機の原理図
、第２図及び第３図は本考案の第１及び第２実施
例の要部を示すブロツク図、第４図は従来の車載
用ラジオ受信機のブロツク図、第５図は従来及び
本考案の車載用ラジオ受信機に搭載される周波数
シンセサイザ同調回路の１例のブロツク図である
。
２……同調回路、３……高周波増幅器、４……
周波数変換回路、５……中間周波増幅器、１０…
…同調回路、２０……混合器、２４……直流検波
回路、２５……Ａ／Ｄ変換器、２６……ＣＰＵ、
２７……ＡＮＤ回路、２８……スイツチング回路
、３０……ラジオ部、３１，３１′……検出部、
３３，３４……ＢＰＦ、Ａ……アンテナ、ＣＲ…
…車載用ラジオ受信機、ＳＬ……スモールランプ
。
Figure 1 is a principle diagram of the in-vehicle radio receiver of the present invention, Figures 2 and 3 are block diagrams showing the main parts of the first and second embodiments of the present invention, and Figure 4 is a conventional in-vehicle radio receiver. Block Diagram of Radio Receiver FIG. 5 is a block diagram of an example of a frequency synthesizer tuning circuit installed in the conventional and in-vehicle radio receivers of the present invention. 2...tuned circuit, 3...high frequency amplifier, 4...
Frequency conversion circuit, 5...Intermediate frequency amplifier, 10...
... Tuning circuit, 20 ... Mixer, 24 ... DC detection circuit, 25 ... A/D converter, 26 ... CPU,
27...AND circuit, 28...Switching circuit, 30...Radio section, 31, 31'...detection section,
33, 34...BPF, A...antenna, CR...
...In-vehicle radio receiver, SL...Small lamp.
Claims (1)
動選局装置と、自動車本体のスモールランプ又は
前照灯の点灯動作を検出する検出部とを備え、該
検出部からの検出信号により上記受信感度又は周
波数選択度の切換えを行なうよう構成したことを
特徴とする車載用ラジオ受信機。 It is equipped with an automatic channel selection device that sets a plurality of reception sensitivities or frequency selectivities, and a detection unit that detects the lighting operation of small lamps or headlights on the car body, and the reception sensitivity or frequency selectivity is determined by the detection signal from the detection unit. An in-vehicle radio receiver characterized by being configured to switch frequency selectivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9446187U JPS643218U (en) | 1987-06-19 | 1987-06-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9446187U JPS643218U (en) | 1987-06-19 | 1987-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS643218U true JPS643218U (en) | 1989-01-10 |
Family
ID=31318986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9446187U Pending JPS643218U (en) | 1987-06-19 | 1987-06-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS643218U (en) |
-
1987
- 1987-06-19 JP JP9446187U patent/JPS643218U/ja active Pending
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