JPS63147041U - - Google Patents
Info
- Publication number
- JPS63147041U JPS63147041U JP1987039404U JP3940487U JPS63147041U JP S63147041 U JPS63147041 U JP S63147041U JP 1987039404 U JP1987039404 U JP 1987039404U JP 3940487 U JP3940487 U JP 3940487U JP S63147041 U JPS63147041 U JP S63147041U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- traffic information
- receiving device
- output
- specific frequency
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 6
- 230000035945 sensitivity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案の一実施例である車載用交通情
報受信装置のＳＤＫシステムを中心とした要部を
示すブロツク図、第２図は第１図における要部ブ
ロツクの詳細回路図、第３図は従来の車載用交通
情報受信装置のブロツク図である。
１…アンテナ、２…フロントエンド、３…バン
ドパスフイルタ、４…ＩＦ検波部、５…ノイズキ
ヤンセル・マルチプレツクス部、６…ＳＫデコー
ダ、７…ＢＫデコーダ、８…ＤＫデコーダ、１０
…ＦＭチユーナ、２０…ＳＤＫシステム、２１…
１２５Ｈｚ信号検出回路、２２…比較回路、２３
…アツテネータ、３０…システムコントローラ、
３１…デイスプレイ・キーボード部、３２…ＣＤ
プレーヤ、３３…カセツトプレーヤ、３４…ＡＭ
チユーナ、４０…ソース切換スイツチ、５０…プ
リアンプ、５１…パワーアンプ、５２…スピーカ
。
Fig. 1 is a block diagram showing the main parts of an in-vehicle traffic information receiving device, mainly the SDK system, which is an embodiment of the present invention, Fig. 2 is a detailed circuit diagram of the main parts blocks in Fig. 1, and Fig. 3 The figure is a block diagram of a conventional in-vehicle traffic information receiving device. 1...Antenna, 2...Front end, 3...Band pass filter, 4...IF detection section, 5...Noise cancel multiplex section, 6...SK decoder, 7...BK decoder, 8...DK decoder, 10
...FM tuner, 20...SDK system, 21...
125Hz signal detection circuit, 22... comparison circuit, 23
...Attenuator, 30...System controller,
31...Display/keyboard part, 32...CD
Player, 33...Cassette player, 34...AM
tuner, 40...source selection switch, 50...preamplifier, 51...power amplifier, 52...speaker.
Claims (1)
数の受信制御信号が副搬送波により変調されて多
重化されて放送されている交通情報システムの放
送を受信する車載用交通情報受信装置において、
主搬送波の受信信号中のオーデイオ検波信号から
、前記受信制御信号成分である特定周波数信号を
検出する信号検出回路と、該信号検出回路の出力
が所定値以上であるときに出力を出す比較器と、
該比較器の出力により前記特定周波数の受信制御
信号の検出感度を低下させるアツテネータとを備
えたことを特徴とする車載用交通情報受信装置。 In an in-vehicle traffic information receiving device that receives a traffic information system broadcast in which a reception control signal of a specific frequency is modulated by a subcarrier and multiplexed and broadcast in order to listen to the traffic information broadcast with the receiving device,
a signal detection circuit that detects a specific frequency signal that is the reception control signal component from the audio detection signal in the reception signal of the main carrier; and a comparator that outputs an output when the output of the signal detection circuit is equal to or higher than a predetermined value. ,
An on-vehicle traffic information receiving device comprising: an attenuator that reduces the detection sensitivity of the reception control signal of the specific frequency based on the output of the comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987039404U JPH055703Y2 (en) | 1987-03-17 | 1987-03-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987039404U JPH055703Y2 (en) | 1987-03-17 | 1987-03-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63147041U true JPS63147041U (en) | 1988-09-28 |
| JPH055703Y2 JPH055703Y2 (en) | 1993-02-15 |
Family
ID=30852535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987039404U Expired - Lifetime JPH055703Y2 (en) | 1987-03-17 | 1987-03-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH055703Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02206920A (en) * | 1989-02-06 | 1990-08-16 | Alpine Electron Inc | Automatic tracking method for radio data system |
-
1987
- 1987-03-17 JP JP1987039404U patent/JPH055703Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02206920A (en) * | 1989-02-06 | 1990-08-16 | Alpine Electron Inc | Automatic tracking method for radio data system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH055703Y2 (en) | 1993-02-15 |
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