JPS5877911U - Audio muting circuit - Google Patents
Audio muting circuitInfo
- Publication number
- JPS5877911U JPS5877911U JP17351381U JP17351381U JPS5877911U JP S5877911 U JPS5877911 U JP S5877911U JP 17351381 U JP17351381 U JP 17351381U JP 17351381 U JP17351381 U JP 17351381U JP S5877911 U JPS5877911 U JP S5877911U
- Authority
- JP
- Japan
- Prior art keywords
- muting circuit
- audio muting
- microprocessor
- audio
- power supply
- 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
Landscapes
- Amplifiers (AREA)
- Noise Elimination (AREA)
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図はマイクロプロセッサ−による音量制御機能を有
する機器の概略構成を示すブロック図であり、第２図は
その各部の動作波形図である。第３図は本考案の音声ミ
ューティング回路を使用した機器の一実施例を示すブロ
ック図であり、第４図はその各部の動作説明波形図であ
るリド・・・・・電源スィッチ、２・・・・・・降圧ト
ランス、３・・・・・・補助電源回路、４・・・・・・
マイクロプロセッサ−１５・・・・・・Ｄ／Ａ変換回路
、６・・・・・・ＤＣ変換回路、７・・・・・・主電源
回路、８・・・・・・音声信号回路、１１・・・・・・
波形整形用トランジスタ、１４・・・・・・スイッチン
グ用トランジスタ。FIG. 1 is a block diagram showing a schematic configuration of a device having a volume control function using a microprocessor, and FIG. 2 is an operational waveform diagram of each part thereof. Fig. 3 is a block diagram showing an embodiment of a device using the audio muting circuit of the present invention, and Fig. 4 is a waveform diagram explaining the operation of each part. ...Step-down transformer, 3...Auxiliary power supply circuit, 4...
Microprocessor - 15...D/A conversion circuit, 6...DC conversion circuit, 7...Main power supply circuit, 8...Audio signal circuit, 11・・・・・・
Waveform shaping transistor, 14...Switching transistor.
Claims (1)
号回路を備える交流電源機器に於いて、前記マイクロプ
ロセッサ−による交流電源信号の検出出力により制御さ
れるスイッチング手段を設け、このスイッチング手段に
よって前記電源の遮断時に前記音声信号回路への音量制
御入力を消勢するようにしてなる音声ミューティング回
路。In an AC power supply device equipped with an audio signal circuit whose volume is controlled by a microprocessor, a switching means is provided which is controlled by the detection output of an AC power signal by the microprocessor, and when the power supply is cut off by this switching means, An audio muting circuit configured to deenergize a volume control input to the audio signal circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17351381U JPS5877911U (en) | 1981-11-20 | 1981-11-20 | Audio muting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17351381U JPS5877911U (en) | 1981-11-20 | 1981-11-20 | Audio muting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5877911U true JPS5877911U (en) | 1983-05-26 |
Family
ID=29965378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17351381U Pending JPS5877911U (en) | 1981-11-20 | 1981-11-20 | Audio muting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5877911U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6075131A (en) * | 1983-09-30 | 1985-04-27 | Matsushita Electric Ind Co Ltd | Voice defeat circuit |
| JPS62144702U (en) * | 1986-03-07 | 1987-09-12 |
-
1981
- 1981-11-20 JP JP17351381U patent/JPS5877911U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6075131A (en) * | 1983-09-30 | 1985-04-27 | Matsushita Electric Ind Co Ltd | Voice defeat circuit |
| JPS62144702U (en) * | 1986-03-07 | 1987-09-12 |
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