JPH0277920U - - Google Patents
Info
- Publication number
- JPH0277920U JPH0277920U JP15693088U JP15693088U JPH0277920U JP H0277920 U JPH0277920 U JP H0277920U JP 15693088 U JP15693088 U JP 15693088U JP 15693088 U JP15693088 U JP 15693088U JP H0277920 U JPH0277920 U JP H0277920U
- Authority
- JP
- Japan
- Prior art keywords
- power amplifying
- resistor
- amplifying transistor
- transistor
- capacitor
- 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
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Amplifiers (AREA)
Description
第１図は本考案の実施例を示す一部省略電気回
路図、第２図はハイブリツドＩＣの同一部省略電
気回路図、第３図は従来例を示す一部省略電気回
路図である。
同図中、２はハイブリツドＩＣ、３は負荷、２
１はリレードライバ、Ｑ１〜Ｑ３とＱ２１はトラ
ンジスタ、Ｑ１１〜Ｑ１７はハイブリツドＩＣを
構成するトランジスタ、Ｄ１とＤ２はダイオード
、Ｃ１〜Ｃ３はコンデンサ、Ｒ１〜Ｒ２２は抵抗
、Ｒｙはリレーである。
FIG. 1 is a partially omitted electric circuit diagram showing an embodiment of the present invention, FIG. 2 is a partially omitted electric circuit diagram of a hybrid IC, and FIG. 3 is a partially omitted electric circuit diagram showing a conventional example. In the figure, 2 is a hybrid IC, 3 is a load, 2
1 is a relay driver, Q1 to Q3 and Q21 are transistors, Q11 to Q17 are transistors forming a hybrid IC, D1 and D2 are diodes, C1 to C3 are capacitors, R1 to R22 are resistors, and Ry is a relay.
Claims (1)
装置の同電力増幅トランジスタに直列に接続した
抵抗を介し、同抵抗に流れる電流が増大したとき
、同抵抗により同電流の増大を電圧検出し、同検
出電圧に基づきコンデンサと抵抗からなる第１の
時定数による時間後に同電力増幅トランジスタの
前段に帰還してミユートせしめると共に、同ミユ
ートを前記コンデンサを共通とする第２の時定数
による時間後に解除するように構成したことを特
徴とする過負荷保護回路。 When the current flowing through the resistor increases through a resistor connected in series with the power amplifying transistor of an audio power amplifying device including a power amplifying transistor, the increase in the current is detected as a voltage by the resistor, and the detected voltage is Based on this, the transistor returns to the previous stage of the power amplifying transistor to mute after a time determined by a first time constant consisting of a capacitor and a resistor, and releases the muted state after a time determined by a second time constant that uses the capacitor in common. An overload protection circuit characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15693088U JPH0277920U (en) | 1988-11-30 | 1988-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15693088U JPH0277920U (en) | 1988-11-30 | 1988-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0277920U true JPH0277920U (en) | 1990-06-14 |
Family
ID=31435917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15693088U Pending JPH0277920U (en) | 1988-11-30 | 1988-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0277920U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006092940A1 (en) * | 2005-02-28 | 2006-09-08 | Pioneer Corporation | Electric power amplifying apparatus |
-
1988
- 1988-11-30 JP JP15693088U patent/JPH0277920U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006092940A1 (en) * | 2005-02-28 | 2006-09-08 | Pioneer Corporation | Electric power amplifying apparatus |
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