JPS6385970U - - Google Patents
Info
- Publication number
- JPS6385970U JPS6385970U JP18082386U JP18082386U JPS6385970U JP S6385970 U JPS6385970 U JP S6385970U JP 18082386 U JP18082386 U JP 18082386U JP 18082386 U JP18082386 U JP 18082386U JP S6385970 U JPS6385970 U JP S6385970U
- Authority
- JP
- Japan
- Prior art keywords
- detector
- output signal
- output
- carrier
- sub
- 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
- 238000010586 diagram Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 1
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図は本考案の一実施例に係る２キヤリア音
声多重方式の復調装置の構成の概略を示したブロ
ツク図、第２図は前記実施例の動作波形図である
。
２，４，１４，２２，２４……バンドパスフイ
ルタ、６，８，３４……ＦＭ検波器、１０……マ
トリクス回路、１８，２６……加算器、２０……
ＡＭ検波器、２８……位相比較器、３０……ステ
レオ・バイリンガル検出器。
FIG. 1 is a block diagram schematically showing the configuration of a two-carrier audio multiplexing demodulator according to an embodiment of the present invention, and FIG. 2 is an operational waveform diagram of the embodiment. 2, 4, 14, 22, 24... Band pass filter, 6, 8, 34... FM detector, 10... Matrix circuit, 18, 26... Adder, 20...
AM detector, 28... phase comparator, 30... stereo bilingual detector.
Claims (1)
で周波数変調して伝送するとともに、前記第１搬
送波の周波数とは異なる周波数の第２搬送波を副
（またはＲ）音声とパイロツトキヤリアとを重畳
した副チヤンネル信号で周波数変調して伝送する
２キヤリア音声多重方式の復調装置であつて、 前記副チヤンネル信号を復調するためのＦＭ検
波器と、前記ＦＭ検波器の出力信号からパイロツ
トキヤリアを取り出すバンドパスフイルタと、前
記ＦＭ検波器の出力信号を与えられる補正回路と
、前記バンドパスフイルタの出力信号と前記補正
回路の出力信号とを加算する加算器と、前記加算
器の出力信号を与えられるＡＭ検波器と、前記Ａ
Ｍ検波器の出力に基づいて、放送の種類を判別す
る判別回路とを含み、 前記補正回路は、前記バンドパスフイルタの出
力信号に含まれる副（またはＲ）音声信号成分を
打ち消すように、前記ＦＭ検波器の出力信号のレ
ベルおよび位相を適宜に補正するものであること
を特徴とする２キヤリア音声多重方式の復調装置
。[Claims for Utility Model Registration] A first carrier wave is frequency-modulated with the main (or (L+R)/2) voice and transmitted, and a second carrier wave with a frequency different from the frequency of the first carrier wave is used as a sub-(or R ) A two-carrier audio multiplexing demodulator that frequency-modulates and transmits a sub-channel signal in which audio and a pilot carrier are superimposed, comprising an FM detector for demodulating the sub-channel signal, and an FM detector for demodulating the sub-channel signal; a bandpass filter for extracting a pilot carrier from an output signal; a correction circuit to which the output signal of the FM detector is applied; an adder for adding the output signal of the bandpass filter and the output signal of the correction circuit; an AM detector to which the output signal of the A detector is applied;
a discrimination circuit that discriminates the type of broadcast based on the output of the M detector, and the correction circuit includes a discrimination circuit that discriminates the type of broadcast based on the output of the M detector, and the correction circuit includes a discrimination circuit that discriminates the type of broadcast based on the output of the M detector, 1. A two-carrier audio multiplexing demodulation device, characterized in that the level and phase of an output signal of an FM detector are appropriately corrected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18082386U JPH0516790Y2 (en) | 1986-11-25 | 1986-11-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18082386U JPH0516790Y2 (en) | 1986-11-25 | 1986-11-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6385970U true JPS6385970U (en) | 1988-06-04 |
| JPH0516790Y2 JPH0516790Y2 (en) | 1993-05-06 |
Family
ID=31125134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18082386U Expired - Lifetime JPH0516790Y2 (en) | 1986-11-25 | 1986-11-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0516790Y2 (en) |
-
1986
- 1986-11-25 JP JP18082386U patent/JPH0516790Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0516790Y2 (en) | 1993-05-06 |
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