JPS6150351U - - Google Patents
Info
- Publication number
- JPS6150351U JPS6150351U JP13352484U JP13352484U JPS6150351U JP S6150351 U JPS6150351 U JP S6150351U JP 13352484 U JP13352484 U JP 13352484U JP 13352484 U JP13352484 U JP 13352484U JP S6150351 U JPS6150351 U JP S6150351U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- detection sensitivity
- multipath detection
- detected
- circuit
- 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 7
- 230000035945 sensitivity Effects 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 2
- 239000000284 extract Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Noise Elimination (AREA)
- Stereo-Broadcasting Methods (AREA)
Description
第１図は本考案によるマルチパス検出感度自動
調整回路を具備する車載用ＦＭラジオの構成を示
すブロツク図、第２図は本考案によるマルチパス
検出感度自動調整回路の実際の回路図、第３図は
ステーシヨン検出時“高”レベルとなるオープン
コレクタ出力端子を具備しない受信機において本
考案を実施するための回路図である。
１…アンテナ、２…フロントエンド、３…中間
周波数増幅および検波回路、４…マルチプレクサ
回路、５…左スピーカ、６…右スピーカ、７…ミ
キサ回路、８…マルチパス検出回路、９…マルチ
パス検出感度制御回路、１０…Ｓメータ出力端子
、１１…セパレーシヨン制御端子、１２…ハイカ
ツト制御端子、１３…増幅器、１４…負出力を出
力する整流回路、１５…強電界時“高”レベル、
中および弱電界時“低”レベルとなるオープンコ
レクタ出力、Ｒ１〜Ｒ１０…抵抗、Ｃ…コンデン
サ、Ｄ１…ダイオード、Ｑ１…ＰＮＰトランジス
タ、Ｑ２，Ｑ３…ＮＰＮトランジスタ。
Fig. 1 is a block diagram showing the configuration of an in-vehicle FM radio equipped with a multipath detection sensitivity automatic adjustment circuit according to the present invention, Fig. 2 is an actual circuit diagram of the multipath detection sensitivity automatic adjustment circuit according to the present invention, and Fig. 3 The figure is a circuit diagram for implementing the present invention in a receiver that does not have an open collector output terminal that becomes a "high" level when a station is detected. 1... Antenna, 2... Front end, 3... Intermediate frequency amplification and detection circuit, 4... Multiplexer circuit, 5... Left speaker, 6... Right speaker, 7... Mixer circuit, 8... Multipath detection circuit, 9... Multipath detection Sensitivity control circuit, 10... S meter output terminal, 11... Separation control terminal, 12... High cut control terminal, 13... Amplifier, 14... Rectifier circuit that outputs a negative output, 15... "High" level at the time of strong electric field,
Open collector output that becomes "low" level in medium and weak electric fields, R1 to R10 ...Resistor, C...Capacitor, D1 ...Diode, Q1 ...PNP transistor, Q2 , Q3 ...NPN transistor.
Claims (1)
抽出し、その大きさによつてセパレーシヨン制御
およびハイカツト制御を行なう車載用ＦＭ受信機
において、Ｓメータ出力の直流電圧を検出し、検
出された直流電圧が高ければマルチパス検出感度
を低くし、その電圧が低ければその感度を高くす
ることを特徴とするマルチパス検出感度自動調整
回路。 In an automotive FM receiver that extracts the AC component in the S meter output of an intermediate frequency amplifier and performs separation control and high-cut control depending on the magnitude, the DC voltage of the S meter output is detected and the detected DC voltage is A multipath detection sensitivity automatic adjustment circuit characterized by lowering multipath detection sensitivity when the voltage is high and increasing the sensitivity when the voltage is low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13352484U JPS6150351U (en) | 1984-09-04 | 1984-09-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13352484U JPS6150351U (en) | 1984-09-04 | 1984-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6150351U true JPS6150351U (en) | 1986-04-04 |
Family
ID=30692066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13352484U Pending JPS6150351U (en) | 1984-09-04 | 1984-09-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6150351U (en) |
-
1984
- 1984-09-04 JP JP13352484U patent/JPS6150351U/ja active Pending
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