JPS61134130U - - Google Patents
Info
- Publication number
- JPS61134130U JPS61134130U JP1663885U JP1663885U JPS61134130U JP S61134130 U JPS61134130 U JP S61134130U JP 1663885 U JP1663885 U JP 1663885U JP 1663885 U JP1663885 U JP 1663885U JP S61134130 U JPS61134130 U JP S61134130U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- muting
- control circuit
- amplifier circuit
- 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
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Description
第１図は本考案になる過電流保護回路の一実施
例の回路図、第２図は電力増幅回路２の出力段に
流れる電流の波形図である。
１…入力端子、２…電力増幅回路、３，４，７
，８，１０，１１，１６，１７，１８…トランジ
スタ、５…スピーカ、６…検出回路、９…ノイズ
防止回路、１２…正電源電圧＋（ＶＣＣ）供給端
子、１３…（−Ｂ）電圧供給端子、１４…負電源
電圧（−ＶＣＣ）供給端子、１５…（＋Ｂ）電圧
供給端子、Ｄ１，Ｄ２…ダイオード、Ｒ１〜Ｒ１
９…抵抗器、Ｃ１〜Ｃ４…コンデンサ、Ｌ…イン
ダクタ。
FIG. 1 is a circuit diagram of an embodiment of the overcurrent protection circuit according to the present invention, and FIG. 2 is a waveform diagram of the current flowing in the output stage of the power amplifier circuit 2. In FIG. 1...Input terminal, 2...Power amplifier circuit, 3, 4, 7
, 8, 10, 11, 16, 17, 18...Transistor, 5...Speaker, 6...Detection circuit, 9...Noise prevention circuit, 12...Positive power supply voltage + (VCC) supply terminal, 13...(-B) voltage supply Terminal, 14...Negative power supply voltage (-VCC) supply terminal, 15...(+B) voltage supply terminal, D1 , D2 ...Diode, R1 to R1
9 ...Resistor, C1 - C4 ...Capacitor, L...Inductor.
Claims (1)
時に所定期間のミユーテイング信号を出力する制
御回路と、 信号入力端子と前記電力増幅回路の入力端子と
の間に設けられ前記制御回路から供給されるミユ
ーテイング信号に対応して前記信号入力端子に入
力される入力信号の前記電力増幅回路への供給を
遮断するミユーテイング回路と、 前記電力増幅回路の負荷が短絡した際に前記電
力増幅回路の出力段能動素子の信号出力端と前記
負荷との間に設けられている抵抗器の両端電位差
を検出し前記検出した電位差により前記制御回路
を作動させて前記ミユーテイング信号を出力させ
る検出回路とから構成される過電流保護回路。[Claims for Utility Model Registration] A control circuit that outputs a muting signal for a predetermined period when power supply voltage is applied or interrupted to the power amplifier circuit; a muting circuit that cuts off supply of an input signal input to the signal input terminal to the power amplifier circuit in response to a muting signal supplied from a control circuit; a detection circuit that detects a potential difference across a resistor provided between a signal output terminal of an output stage active element of an amplifier circuit and the load, and operates the control circuit based on the detected potential difference to output the muting signal; An overcurrent protection circuit consisting of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1663885U JPS61134130U (en) | 1985-02-08 | 1985-02-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1663885U JPS61134130U (en) | 1985-02-08 | 1985-02-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61134130U true JPS61134130U (en) | 1986-08-21 |
Family
ID=30503598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1663885U Pending JPS61134130U (en) | 1985-02-08 | 1985-02-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61134130U (en) |
-
1985
- 1985-02-08 JP JP1663885U patent/JPS61134130U/ja active Pending
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