JPS5828419U - Audio amplifier output protection circuit - Google Patents
Audio amplifier output protection circuitInfo
- Publication number
- JPS5828419U JPS5828419U JP12335781U JP12335781U JPS5828419U JP S5828419 U JPS5828419 U JP S5828419U JP 12335781 U JP12335781 U JP 12335781U JP 12335781 U JP12335781 U JP 12335781U JP S5828419 U JPS5828419 U JP S5828419U
- Authority
- JP
- Japan
- Prior art keywords
- protection circuit
- audio amplifier
- output protection
- current control
- switching means
- 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)
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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図はこの考案による音声増幅器の保護回路の一実施例を
示す回路図である。
１０はスイッチング手段としての電磁リレー、１２は第
１の電流制御素子としてのトランジスタ、１４は第２の
電流制御素子としてのトランジスタ、１６．１８はトラ
ンジスタ、２０は電源トランス、２２．２４は２次側出
力、２６，２８．３０はダイオード、３２．３６．３８
．４４は抵抗、３４゜４２はコンデンサ、４０は直流電
源端子である。The figure is a circuit diagram showing an embodiment of a protection circuit for an audio amplifier according to this invention. 10 is an electromagnetic relay as a switching means, 12 is a transistor as a first current control element, 14 is a transistor as a second current control element, 16.18 is a transistor, 20 is a power transformer, 22.24 is a secondary Side output, 26, 28.30 are diodes, 32.36.38
．． 44 is a resistor, 34° 42 is a capacitor, and 40 is a DC power supply terminal.
Claims (1)
、このスイッチング手段を電源人後に閉状態に遅延駆動
する駆動回路を備えてなる音声増幅器の出力保護回路に
おいて、上記駆動回路は、上記電源人後から遅延されて
所定時間経過後に能動化される第１の電流制御素子と、
電源切後に直ちに非能動化される第２の電流制御素子と
を有し、第１、第２の電流制御素子が共に能ｉ化された
ときだけ上記スイッチング手段を閉状態に駆動するよう
に構成されていることを特徴とする音声増幅器の出力保
護回路。In an output protection circuit for an audio amplifier, the output protection circuit includes a switching means intervening in the output signal path of the audio amplifier, and a drive circuit for delay-driving the switching means to a closed state after the power supply is turned on. a first current control element that is delayed and activated after a predetermined period of time has elapsed;
a second current control element that is deactivated immediately after the power is turned off, and configured to drive the switching means to the closed state only when both the first and second current control elements are activated. An output protection circuit for an audio amplifier, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12335781U JPS5828419U (en) | 1981-08-20 | 1981-08-20 | Audio amplifier output protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12335781U JPS5828419U (en) | 1981-08-20 | 1981-08-20 | Audio amplifier output protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5828419U true JPS5828419U (en) | 1983-02-24 |
Family
ID=29917260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12335781U Pending JPS5828419U (en) | 1981-08-20 | 1981-08-20 | Audio amplifier output protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5828419U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02120860U (en) * | 1989-03-16 | 1990-09-28 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5667018A (en) * | 1979-11-06 | 1981-06-05 | Shin Gijutsu Kaihatsu Kk | Construction of earth anchor and device thereof |
-
1981
- 1981-08-20 JP JP12335781U patent/JPS5828419U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5667018A (en) * | 1979-11-06 | 1981-06-05 | Shin Gijutsu Kaihatsu Kk | Construction of earth anchor and device thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02120860U (en) * | 1989-03-16 | 1990-09-28 |
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