JPH0390510U - - Google Patents
Info
- Publication number
- JPH0390510U JPH0390510U JP15307489U JP15307489U JPH0390510U JP H0390510 U JPH0390510 U JP H0390510U JP 15307489 U JP15307489 U JP 15307489U JP 15307489 U JP15307489 U JP 15307489U JP H0390510 U JPH0390510 U JP H0390510U
- Authority
- JP
- Japan
- Prior art keywords
- power amplifier
- amplifier circuit
- headphone
- speaker
- headphone jack
- 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 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
図は本考案の一実施例による音響装置を示す回
路図である。
１１ａ，１１ｂ……音響信号源、１２……ボリ
ユーム、１３……パワーアンプ回路、１４ａ，１
４ｂ……スピーカ結線、１５ａ，１５ｂ……スピ
ーカ、１６……ヘツドホンジヤツク、１８ａ，１
８ｂ……出力スイツチ、２０……プラグ検出スイ
ツチ、２２……コンデンサ、２５……ボリユーム
制御回路。
The figure is a circuit diagram showing an audio device according to an embodiment of the present invention. 11a, 11b...acoustic signal source, 12...volume, 13...power amplifier circuit, 14a, 1
4b...Speaker connection, 15a, 15b...Speaker, 16...Headphone jack, 18a, 1
8b...Output switch, 20...Plug detection switch, 22...Capacitor, 25...Volume control circuit.
Claims (1)
出力するためのパワーアンプ回路と、該ヘツドホ
ンジヤツクにヘツドホンプラグが挿入された際に
、前記パワーアンプ回路と前記スピーカとの接続
をしや断する出力スイツチと、前記ヘツドホンジ
ヤツクから前記ヘツドホンプラグが抜かれた際に
、前記パワーアンプ回路からの出力を低下させる
音量制御回路とを備えたことを特徴とする音響装
置。 A headphone jack, a power amplifier circuit for outputting an acoustic signal to a speaker, and an output switch for disconnecting the power amplifier circuit from the speaker when a headphone plug is inserted into the headphone jack. and a volume control circuit that reduces the output from the power amplifier circuit when the headphone plug is removed from the headphone jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15307489U JPH0390510U (en) | 1989-12-28 | 1989-12-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15307489U JPH0390510U (en) | 1989-12-28 | 1989-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0390510U true JPH0390510U (en) | 1991-09-13 |
Family
ID=31699300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15307489U Pending JPH0390510U (en) | 1989-12-28 | 1989-12-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0390510U (en) |
-
1989
- 1989-12-28 JP JP15307489U patent/JPH0390510U/ja active Pending
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