JPS6312913U - - Google Patents
Info
- Publication number
- JPS6312913U JPS6312913U JP8736686U JP8736686U JPS6312913U JP S6312913 U JPS6312913 U JP S6312913U JP 8736686 U JP8736686 U JP 8736686U JP 8736686 U JP8736686 U JP 8736686U JP S6312913 U JPS6312913 U JP S6312913U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- conductive
- control
- selection switch
- muting
- 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
- 230000008054 signal transmission Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 3
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Amplifiers (AREA)
Description
図示した回路は、本考案のミユーテイング回路
の一実施例である。
主な図番の説明、１……磁気ヘツド、２……テ
ープレコーダー回路、３……ラジオ受信回路、４
……補助入力端子、５……選択スイツチ、７……
信号伝送路、８……主増幅回路、１０……ミユー
テイング用トランジスター、１１……制御トラン
ジスター、１４……コンデンサー、１５……時定
数回路、１６……スイツチングトランジスター、
１８……連動スイツチ。
The illustrated circuit is one embodiment of the muting circuit of the present invention. Explanation of main drawing numbers, 1...Magnetic head, 2...Tape recorder circuit, 3...Radio receiving circuit, 4
...Auxiliary input terminal, 5...Selection switch, 7...
Signal transmission path, 8... Main amplifier circuit, 10... Muting transistor, 11... Control transistor, 14... Capacitor, 15 ... Time constant circuit, 16... Switching transistor,
18...Interlocking switch.
Claims (1)
る選択スイツチと、該選択スイツチにより選択さ
れた信号が流れる信号伝送路と、該信号伝送路と
接地間にコレクタ・エミツタ路が接続されている
と共に導通状態にあるとき該信号伝送路を流れる
信号を側路するミユーテイング用トランジスター
と、該ミユーテイング用トランジスターの動作を
制御するべく接続されていると共に導通状態にあ
るとき該ミユーテイング用トランジスターを導通
状態にせしめる制御トランジスターと、該制御ト
ランジスターのベース回路に接続されていると共
に該制御トランジスターの導通時間を設定する時
定数回路と、該時定数回路を構成するコンデンサ
ーの両端にコレクタ及びエミツタが接続されてい
ると共に導通状態にあるとき該コンデンサーの充
電電荷を瞬時に放電せしめるスイツチングトラン
ジスターと、前記選択スイツチと連動して切換え
られると共に前記スイツチングトランジスターの
動作を制御するべく接続されているノンシヨーテ
イング型の連動スイツチとより成り、前記選択ス
イツチの非切換操作時前記スイツチングトランジ
スターを前記連動スイツチにより非導通状態にせ
しめ、該選択スイツチの切換操作時該スイツチン
グトランジスターを該連動スイツチにより短時間
導通状態にせしめるようにしたことを特徴とする
音響装置のミユーテイング回路。 A selection switch provided to select a listening signal, a signal transmission path through which the signal selected by the selection switch flows, and a collector-emitter path connected between the signal transmission path and ground, and conductive. a muting transistor that bypasses a signal flowing through the signal transmission path when in a state, and a control that is connected to control the operation of the muting transistor and makes the muting transistor conductive when it is in a conductive state. A transistor, a time constant circuit connected to the base circuit of the control transistor and setting the conduction time of the control transistor, and a collector and an emitter connected to both ends of a capacitor constituting the time constant circuit, and conductive. a switching transistor that instantaneously discharges the charge in the capacitor when in the selected state; and a non-switching interlocking switch that is switched in conjunction with the selection switch and is connected to control the operation of the switching transistor. The interlocking switch makes the switching transistor non-conductive when the selection switch is not switched, and the interlocking switch makes the switching transistor conductive for a short time when the selection switch is switched. A muting circuit for an audio device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8736686U JPS6312913U (en) | 1986-06-09 | 1986-06-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8736686U JPS6312913U (en) | 1986-06-09 | 1986-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6312913U true JPS6312913U (en) | 1988-01-28 |
Family
ID=30944506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8736686U Pending JPS6312913U (en) | 1986-06-09 | 1986-06-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6312913U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62114863A (en) * | 1985-11-12 | 1987-05-26 | Sanwa Niidorubearingu Kk | Method for precisely grinding cylindrical outer surface and device therefor |
| JPH04115562U (en) * | 1991-03-25 | 1992-10-14 | 光洋機械工業株式会社 | Workpiece support device for centerless grinding machine |
| JPH0611957U (en) * | 1992-07-24 | 1994-02-15 | 光洋機械工業株式会社 | Grinding machine for thin cylindrical workpieces |
-
1986
- 1986-06-09 JP JP8736686U patent/JPS6312913U/ja active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62114863A (en) * | 1985-11-12 | 1987-05-26 | Sanwa Niidorubearingu Kk | Method for precisely grinding cylindrical outer surface and device therefor |
| JPH0325296B2 (en) * | 1985-11-12 | 1991-04-05 | Sanwa Niidorubearingu Kk | |
| JPH04115562U (en) * | 1991-03-25 | 1992-10-14 | 光洋機械工業株式会社 | Workpiece support device for centerless grinding machine |
| JPH0611957U (en) * | 1992-07-24 | 1994-02-15 | 光洋機械工業株式会社 | Grinding machine for thin cylindrical workpieces |
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