JPS6072014U - Muting circuit for audio equipment - Google Patents
Muting circuit for audio equipmentInfo
- Publication number
- JPS6072014U JPS6072014U JP16381583U JP16381583U JPS6072014U JP S6072014 U JPS6072014 U JP S6072014U JP 16381583 U JP16381583 U JP 16381583U JP 16381583 U JP16381583 U JP 16381583U JP S6072014 U JPS6072014 U JP S6072014U
- Authority
- JP
- Japan
- Prior art keywords
- muting
- transistor
- switching transistor
- base
- charging
- 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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案に係るミューティング回路の一実施例を
示す電気回路図、第２図Ａ及びＢは同上のミューティン
グ回路の動作説明に供された動作説明図である。
１：切換スイッチ、１ａ：可動端子、ＰＴ−ＰＲ＠ＰＬ
：ポジション端子、Ｑ１ニスイツチング用トランジスタ
、Ｑ２：ミューティング用トランジスタ、Ｃ：コンデン
サ、Ｒ３：抵抗。FIG. 1 is an electric circuit diagram showing an embodiment of the muting circuit according to the present invention, and FIGS. 2A and 2B are operation explanatory diagrams used to explain the operation of the muting circuit. 1: Selector switch, 1a: Movable terminal, PT-PR@PL
: Position terminal, Q1 switching transistor, Q2: muting transistor, C: capacitor, R3: resistor.
Claims (1)
トランジスタと、該ミューティング用トランジスタのベ
ース側に設けられた充放電回路と、該充放電回路を介し
て上記ミューティング用トランジスタのベースに定電圧
を供給する十Ｂ電源と、上記充放電回路より上記十Ｂ電
源寄りに設けられたオン時上記ミューティング用トラン
ジスタのベースへの十Ｂ電源の供給を遮断するスイッチ
ング用トランジスタと、該スイッチング用トランジスタ
のベースと上記十Ｂ電源との間にあって１つの可動端子
と該可動端子に選択的に切り換えられる複数個のポジシ
ョン端子より成り、上記可動端子を上記ポジション端子
の何れかにオンしたとき上記スイッチング用トランジス
タのベースに十Ｂ電源を供給し斯るスイッチング用トラ
ンジスタをオンする切換スイッチとから成り、上記ミュ
ーティング用トランジスタは上記切換スイッチの切換動
作に伴う上記スイッチング用トランジスタのオフで上記
十Ｂ電源を供給されてオンしてミューティング動作をし
、その後、上記スイッチング用トランジスタのオンに拘
らず上記充放電回路の放電動作の間上記オン状態を持続
してミューティング動作をするものであることを特徴と
する音響機器のミューティング回路。A muting transistor for muting an audio signal, a charging/discharging circuit provided on the base side of the muting transistor, and a circuit for supplying a constant voltage to the base of the muting transistor via the charging/discharging circuit. B power supply, a switching transistor that is provided closer to the 1B power supply than the charging/discharging circuit and cuts off the supply of the 1B power supply to the base of the muting transistor when turned on, and the base of the switching transistor and the It consists of one movable terminal and a plurality of position terminals that are selectively switched to the movable terminal between the 10B power supply, and when the movable terminal is turned on to any of the position terminals, the base of the switching transistor It consists of a changeover switch that supplies 10B power and turns on the switching transistor, and the muting transistor is turned on by being supplied with the 10B power when the switching transistor is turned off by the switching operation of the changeover switch. and then performs a muting operation by maintaining the on state during the discharging operation of the charging/discharging circuit regardless of whether the switching transistor is on. muting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16381583U JPS6072014U (en) | 1983-10-21 | 1983-10-21 | Muting circuit for audio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16381583U JPS6072014U (en) | 1983-10-21 | 1983-10-21 | Muting circuit for audio equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6072014U true JPS6072014U (en) | 1985-05-21 |
Family
ID=30359319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16381583U Pending JPS6072014U (en) | 1983-10-21 | 1983-10-21 | Muting circuit for audio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6072014U (en) |
-
1983
- 1983-10-21 JP JP16381583U patent/JPS6072014U/en active Pending
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