JPH0264253U - - Google Patents
Info
- Publication number
- JPH0264253U JPH0264253U JP14475888U JP14475888U JPH0264253U JP H0264253 U JPH0264253 U JP H0264253U JP 14475888 U JP14475888 U JP 14475888U JP 14475888 U JP14475888 U JP 14475888U JP H0264253 U JPH0264253 U JP H0264253U
- Authority
- JP
- Japan
- Prior art keywords
- stereo
- signal
- detection circuit
- frequency signal
- intermediate 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 7
- 230000005236 sound signal Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Stereo-Broadcasting Methods (AREA)
Description
第１図は本考案の１実施例を示すＦＭステレオ
受信機の要部ブロツク図、第２図は本考案による
実施例の音声信号周波数特性図、第３図は従来例
を示すＦＭステレオ受信機の要部ブロツク図、第
４図は従来例の音声信号周波数特性図である。
６，８……ハイカツトフイルタ、７，９……ロ
ーカツトフイルタ、１４……エンベロープ検波回
路、１５……マルチパスノイズ検出回路。
Fig. 1 is a block diagram of the main parts of an FM stereo receiver showing an embodiment of the present invention, Fig. 2 is an audio signal frequency characteristic diagram of the embodiment of the invention, and Fig. 3 is an FM stereo receiver showing a conventional example. FIG. 4 is a diagram of the audio signal frequency characteristics of a conventional example. 6, 8...High cut filter, 7, 9...Low cut filter, 14...Envelope detection circuit, 15...Multipath noise detection circuit.
Claims (1)
信号に変換するフロントエンドと、該中間周波信
号をＦＭ検波しステレオ信号を出力するＦＭ検波
回路と、ステレオ信号を復調し左右チヤンネル音
声信号を出力するステレオ復調回路を有するＦＭ
ステレオ受信機において、前記中間周波信号のエ
ンベロープを検出するエンベロープ検波回路と、
該エンベロープ検波回路の出力信号からマルチパ
スノイズを検出しマルチパスノイズのレベルに応
じた制御信号を発生するマルチパスノイズ検出回
路と、制御信号によりオン、オフされるスイツチ
ング回路と、該スイツチング回路のオン、オフに
よつて、左右チヤンネル音声信号の通過帯域を制
御するハイカツトフイルタとローカツトフイルタ
とを備えたことを特徴とするＦＭステレオ受信機
。 A front end that converts a high frequency signal input from an antenna into an intermediate frequency signal, an FM detection circuit that performs FM detection on the intermediate frequency signal and outputs a stereo signal, and a stereo demodulator that demodulates the stereo signal and outputs left and right channel audio signals. FM with circuit
In the stereo receiver, an envelope detection circuit that detects an envelope of the intermediate frequency signal;
a multipath noise detection circuit that detects multipath noise from the output signal of the envelope detection circuit and generates a control signal according to the level of the multipath noise; a switching circuit that is turned on and off by the control signal; An FM stereo receiver comprising a high-cut filter and a low-cut filter that control the passband of left and right channel audio signals by turning them on and off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14475888U JPH0264253U (en) | 1988-11-05 | 1988-11-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14475888U JPH0264253U (en) | 1988-11-05 | 1988-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0264253U true JPH0264253U (en) | 1990-05-15 |
Family
ID=31412744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14475888U Pending JPH0264253U (en) | 1988-11-05 | 1988-11-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0264253U (en) |
-
1988
- 1988-11-05 JP JP14475888U patent/JPH0264253U/ja active Pending
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