JPH025919U - - Google Patents
Info
- Publication number
- JPH025919U JPH025919U JP8457988U JP8457988U JPH025919U JP H025919 U JPH025919 U JP H025919U JP 8457988 U JP8457988 U JP 8457988U JP 8457988 U JP8457988 U JP 8457988U JP H025919 U JPH025919 U JP H025919U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- transistor
- voltage
- supply voltage
- 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
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Amplifiers (AREA)
Description
図は本考案の一実施例を示す回路図である。
主な図番の説明、１…電源回路、６…第１定電
圧回路、１３…第２定電圧回路、２１…制御トラ
ンジスタ、２４…駆動トランジスタ、２９…ミユ
ーテイングトランジスタ。
The figure is a circuit diagram showing an embodiment of the present invention. Explanation of main figure numbers: 1 ...power supply circuit, 6 ...first constant voltage circuit, 13 ...second constant voltage circuit, 21...control transistor, 24...drive transistor, 29...mutating transistor.
Claims (1)
源線路にコレクタ・エミツタ路が挿入されたトラ
ンジスタ及び該トランジスタのベース電圧を設定
する為のツエナーダイオードを備え、前記電源回
路からの電源電圧を定電圧化する定電圧回路と、
信号路を遮断するミユーテイングトランジスタと
、該ミユーテイングトランジスタを駆動する駆動
トランジスタと、前記ツエナーダイオードに流れ
るツエナー電流により制御されると共に前記駆動
トランジスタを制御する制御トランジスタとから
成り、電源投入時において、前記駆動トランジス
タの制御電圧として、まず、定電圧化されていな
い電源電圧を印加し、その後、定電圧化された電
源電圧を印加する様にしたことを特徴とするミユ
ーテイング装置。 A transistor with a collector-emitter path inserted in the power supply line through which the power supply voltage generated from the power supply circuit is transmitted, and a Zener diode for setting the base voltage of the transistor are provided, and the power supply voltage from the power supply circuit is made constant. A constant voltage circuit,
It consists of a muting transistor that blocks a signal path, a drive transistor that drives the muting transistor, and a control transistor that is controlled by the Zener current flowing through the Zener diode and controls the drive transistor, and when the power is turned on, A muting device characterized in that, as a control voltage of the driving transistor, first, a non-regulated power supply voltage is applied, and then a regulated power supply voltage is applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8457988U JPH025919U (en) | 1988-06-27 | 1988-06-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8457988U JPH025919U (en) | 1988-06-27 | 1988-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH025919U true JPH025919U (en) | 1990-01-16 |
Family
ID=31309259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8457988U Pending JPH025919U (en) | 1988-06-27 | 1988-06-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH025919U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6291007A (en) * | 1985-10-16 | 1987-04-25 | Sanyo Electric Co Ltd | Power source voltage detecting circuit |
-
1988
- 1988-06-27 JP JP8457988U patent/JPH025919U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6291007A (en) * | 1985-10-16 | 1987-04-25 | Sanyo Electric Co Ltd | Power source voltage detecting circuit |
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