JPS5871270U - Audio multiplex circuit malfunction prevention circuit - Google Patents
Audio multiplex circuit malfunction prevention circuitInfo
- Publication number
- JPS5871270U JPS5871270U JP16610181U JP16610181U JPS5871270U JP S5871270 U JPS5871270 U JP S5871270U JP 16610181 U JP16610181 U JP 16610181U JP 16610181 U JP16610181 U JP 16610181U JP S5871270 U JPS5871270 U JP S5871270U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- pilot signal
- audio
- broadcast
- subcarrier
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は二搬送波方式の音声多重放送を受信するテレビ
ジョン受像機の音声多重回路を示すブロック図、第２図
は同回路に本考案の誤動作防止回路を施した例を示すブ
ロック図、第３図は本考案の誤動作防止回路の一実施例
の具体的構成を示す回路図、第４図は、ＦＭ−ＦＭ方式
の音声多重放送を受信するテレビジョン受像機の音声多
重回路に本考案の誤動作防止回路を施した例を示すブロ
ック図である。
７・・・パイロット信号判別回路、１７・・・スイッチ
ング回路、１８・・・副搬送波検出回路。FIG. 1 is a block diagram showing an audio multiplexing circuit of a television receiver that receives dual-carrier audio multiplex broadcasting, FIG. Figure 3 is a circuit diagram showing a specific configuration of an embodiment of the malfunction prevention circuit of the present invention, and Figure 4 is a circuit diagram showing the implementation of the present invention in the audio multiplexing circuit of a television receiver that receives FM-FM audio multiplex broadcasting. FIG. 2 is a block diagram showing an example in which a malfunction prevention circuit is provided. 7... Pilot signal discrimination circuit, 17... Switching circuit, 18... Subcarrier detection circuit.
Claims (1)
ト信号を検出して判別し、ステレオ放送受信モードと主
副チャンネル異種音声放送受信モードを自動的に切り換
えるパイロット信号判別回路を有する音声多重回路にお
いて、前記受信信号中の副搬送波の有無を検出する副搬
送波検出回路と、該副搬送波検出回路の出力によって駆
動され前記パイロット信号判別回路への入力を阻止もし
くは通過させるスイッチング回路とを備え、音声多重放
送受信時には、前記副搬送検出回路の出力により前記ス
イッチング回路を一方の状態に切換えてパイロット信号
を前記パイロット信号判別回路へ入力し、モノ゛ラル放
送受信時には、前記副搬送波検出回路の出力により前記
スイッチング回路を他方の状態に切換えて前記パイロッ
ト信号判別回路への入力を阻止するようになしたことを
特徴とする音声多重回路の誤動作防止回路。An audio multiplex circuit having a pilot signal discrimination circuit that detects and discriminates a pilot signal in the received signal when receiving an audio multiplex broadcast, and automatically switches between a stereo broadcast reception mode and a main/sub channel different type audio broadcast reception mode. a subcarrier detection circuit for detecting the presence or absence of a subcarrier in the received signal; and a switching circuit driven by the output of the subcarrier detection circuit to block or pass input to the pilot signal discrimination circuit, When receiving a multiplex broadcast, the switching circuit is switched to one state by the output of the subcarrier detection circuit and a pilot signal is input to the pilot signal discrimination circuit, and when receiving a monaural broadcast, the output of the subcarrier detection circuit A malfunction prevention circuit for an audio multiplexing circuit, characterized in that the switching circuit is switched to the other state to prevent input to the pilot signal discrimination circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16610181U JPS5871270U (en) | 1981-11-07 | 1981-11-07 | Audio multiplex circuit malfunction prevention circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16610181U JPS5871270U (en) | 1981-11-07 | 1981-11-07 | Audio multiplex circuit malfunction prevention circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5871270U true JPS5871270U (en) | 1983-05-14 |
Family
ID=29958269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16610181U Pending JPS5871270U (en) | 1981-11-07 | 1981-11-07 | Audio multiplex circuit malfunction prevention circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5871270U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58152061U (en) * | 1982-04-07 | 1983-10-12 | ソニー株式会社 | Receiving machine |
| JPS59221182A (en) * | 1983-05-31 | 1984-12-12 | Sony Corp | Pilot signal discriminating device |
| JPS61269470A (en) * | 1984-11-26 | 1986-11-28 | Nec Corp | Sound multiplex signal switching circuit |
-
1981
- 1981-11-07 JP JP16610181U patent/JPS5871270U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58152061U (en) * | 1982-04-07 | 1983-10-12 | ソニー株式会社 | Receiving machine |
| JPS59221182A (en) * | 1983-05-31 | 1984-12-12 | Sony Corp | Pilot signal discriminating device |
| JPS61269470A (en) * | 1984-11-26 | 1986-11-28 | Nec Corp | Sound multiplex signal switching circuit |
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