JPS625776U - - Google Patents
Info
- Publication number
- JPS625776U JPS625776U JP9775485U JP9775485U JPS625776U JP S625776 U JPS625776 U JP S625776U JP 9775485 U JP9775485 U JP 9775485U JP 9775485 U JP9775485 U JP 9775485U JP S625776 U JPS625776 U JP S625776U
- Authority
- JP
- Japan
- Prior art keywords
- output
- subcarrier
- rectifying
- audio multiplex
- switching
- 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
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Television Receiver Circuits (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Television Systems (AREA)
Description
第１図は本考案の音声多重判別回路を示す回路
図、第２図は従来の音声多重判別回路を示す回路
図である。
主な図番の説明、２……帯域フイルタ、３，４
，１２……ダイオード、５……抵抗、６……コン
デンサ、７，１１……トランジスタ。
FIG. 1 is a circuit diagram showing an audio multiplex discrimination circuit according to the present invention, and FIG. 2 is a circuit diagram showing a conventional audio multiplex discrimination circuit. Explanation of main drawing numbers, 2...Band filter, 3, 4
, 12...Diode, 5...Resistor, 6...Capacitor, 7, 11...Transistor.
Claims (1)
声多重判別回路において、前記副搬送波を抜き出
す帯域フイルタと、該帯域フイルタの出力端に接
続され、前記副搬送波を整流用素子と、該整流用
素子の出力端に接続され、該整流用素子の出力が
オフした時にのみ、その出力端及びアース間に接
続されたコンデンサの電荷を瞬時に放電させる放
電用素子と、該放電用素子の出力端に接続され、
前記整流用素子の出力によりスイツチングすると
共にそのスイツチング出力を音声多重判別用の制
御信号となすスイツチング素子より成ることを特
徴とする音声多重判別回路。 An audio multiplex discrimination circuit that determines the presence or absence of a subcarrier in audio multiplexing includes a bandpass filter for extracting the subcarrier, an element connected to the output end of the bandpass filter for rectifying the subcarrier, and an output of the rectification element. a discharging element connected to the output terminal of the rectifying element, which instantly discharges the electric charge of the capacitor connected between the output terminal and the ground only when the output of the rectifying element is turned off; ,
An audio multiplex discrimination circuit comprising a switching element that performs switching based on the output of the rectifying element and uses the switching output as a control signal for audio multiplex discrimination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9775485U JPS625776U (en) | 1985-06-27 | 1985-06-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9775485U JPS625776U (en) | 1985-06-27 | 1985-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS625776U true JPS625776U (en) | 1987-01-14 |
Family
ID=30965034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9775485U Pending JPS625776U (en) | 1985-06-27 | 1985-06-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS625776U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02118611U (en) * | 1989-03-13 | 1990-09-25 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59141877A (en) * | 1983-02-02 | 1984-08-14 | Matsushita Electric Ind Co Ltd | Detecting circuit for sound multiplex discriminating signal |
-
1985
- 1985-06-27 JP JP9775485U patent/JPS625776U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59141877A (en) * | 1983-02-02 | 1984-08-14 | Matsushita Electric Ind Co Ltd | Detecting circuit for sound multiplex discriminating signal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02118611U (en) * | 1989-03-13 | 1990-09-25 |