JPS61168711U - - Google Patents
Info
- Publication number
- JPS61168711U JPS61168711U JP5158485U JP5158485U JPS61168711U JP S61168711 U JPS61168711 U JP S61168711U JP 5158485 U JP5158485 U JP 5158485U JP 5158485 U JP5158485 U JP 5158485U JP S61168711 U JPS61168711 U JP S61168711U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- control transistor
- power supply
- state
- control
- 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 1
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Amplifiers (AREA)
Description
第１図は本考案の一実施例を示す図、第２図は
従来例を示す図である。
１０，１１…ミユーテイング用トランジスタ、
１４…駆動トランジスタ、２０…制御トランジス
タ、２１…コンデンサ、２３…逆流防止用ダイオ
ード、２５…抵抗。
FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a conventional example. 10, 11... Muting transistor,
14... Drive transistor, 20... Control transistor, 21... Capacitor, 23... Backflow prevention diode, 25... Resistor.
Claims (1)
グ用トランジスタと、このミユーテイング用トラ
ンジスタを駆動する駆動トランジスタと、この駆
動トランジスタの動作を制御する制御トランジス
タと、この制御トランジスタのエミツタに接続さ
れ且つ電源供給状態において逆流防止用ダイオー
ドを介して充電されるコンデンサと、前記制御ト
ランジスタのベースと電源供給線路間に接続され
た抵抗とを備え、電源が遮断された際、前記制御
トランジスタのベース及びエミツタにおける電圧
降下速度を相違せしめることにより前記制御トラ
ンジスタをオン状態に設定し、以つて前記駆動ト
ランジスタ及びミユーテイング用トランジスタを
オン状態にせしめるようにしたことを特徴とする
ミユーテイング回路。 A mutating transistor connected between the signal transmission path and the ground, a drive transistor that drives the muting transistor, a control transistor that controls the operation of the drive transistor, and a power supply state that is connected to the emitter of the control transistor. and a resistor connected between the base of the control transistor and the power supply line, and the voltage drop at the base and emitter of the control transistor when the power supply is cut off. A muting circuit characterized in that the control transistor is set to an on state by making the speeds different, and the driving transistor and the mutating transistor are thereby set to an on state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5158485U JPS61168711U (en) | 1985-04-05 | 1985-04-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5158485U JPS61168711U (en) | 1985-04-05 | 1985-04-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61168711U true JPS61168711U (en) | 1986-10-20 |
Family
ID=30570767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5158485U Pending JPS61168711U (en) | 1985-04-05 | 1985-04-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61168711U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837212B2 (en) * | 1979-12-10 | 1983-08-15 | 正作 佐怒賀 | Cooling material transport device in cooling water tank |
| JPS594209A (en) * | 1982-06-29 | 1984-01-11 | Matsushita Electric Ind Co Ltd | Muting circuit preventing shock sound |
-
1985
- 1985-04-05 JP JP5158485U patent/JPS61168711U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837212B2 (en) * | 1979-12-10 | 1983-08-15 | 正作 佐怒賀 | Cooling material transport device in cooling water tank |
| JPS594209A (en) * | 1982-06-29 | 1984-01-11 | Matsushita Electric Ind Co Ltd | Muting circuit preventing shock sound |