JPH03111016U - - Google Patents
Info
- Publication number
- JPH03111016U JPH03111016U JP2020590U JP2020590U JPH03111016U JP H03111016 U JPH03111016 U JP H03111016U JP 2020590 U JP2020590 U JP 2020590U JP 2020590 U JP2020590 U JP 2020590U JP H03111016 U JPH03111016 U JP H03111016U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- capacitor
- power
- output side
- delay 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims 6
- 230000001934 delay Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
Landscapes
- Amplifiers (AREA)
Description
第１図はこの考案の第１の実施例に係るミユー
テイング機能付オーデイオアンプの構成を示す回
路図、第２図は第１図の電源スイツチのオン・オ
フ時のミユーテイング動作を示す線図、第３図は
第１図の過電流検出時の動作を示す線図、第４図
はこの考案の第２の実施例に係るミユーテイング
機能付オーデイオアンプの構成を示す回路図であ
る。第５図は従来のミユーテイング機能付オーデ
イオアンプの構成を示す回路図、第６図は第５図
の電源スイツチのオン・オフ時のミユーテイング
動作を示す線図、第７図は第５図の過電流検出時
の動作を示す線図である。
主な符号の説明、１２Ａ……整流回路、１４Ａ
……遅延回路、１６……電源供給制御回路、２０
……電力増幅回路、２２……Ｂクラス増幅器、２
４……Ａクラス増幅器、３０……過電流検出回路
、３２Ａ，４２……ドライバ、４０……電源オフ
検出回路。
FIG. 1 is a circuit diagram showing the configuration of an audio amplifier with a muting function according to the first embodiment of this invention, FIG. 2 is a diagram showing the muting operation when the power switch of FIG. 1 is turned on and off, and FIG. FIG. 3 is a diagram showing the operation at the time of overcurrent detection in FIG. 1, and FIG. 4 is a circuit diagram showing the configuration of an audio amplifier with a muting function according to a second embodiment of the invention. Figure 5 is a circuit diagram showing the configuration of a conventional audio amplifier with a muting function, Figure 6 is a diagram showing the muting operation when the power switch in Figure 5 is turned on and off, and Figure 7 is a diagram showing the configuration of a conventional audio amplifier with a muting function. FIG. 3 is a diagram showing operations during current detection. Explanation of main symbols, 12A... Rectifier circuit, 14A
... Delay circuit, 16 ... Power supply control circuit, 20
...Power amplifier circuit, 22...B class amplifier, 2
4...A class amplifier, 30...Overcurrent detection circuit, 32A, 42...Driver, 40...Power off detection circuit.
Claims (1)
流回路と、抵抗とコンデンサを含み、整流回路の
出力を遅延する遅延回路と、遅延回路の出力に基
づきアンプ初段のＡクラス増幅器への供給電源を
オン・オフする電源供給制御回路と、を含むオー
デイオアンプにおいて、 整流回路の出力側に設けられて、ＡＣ電源のオ
フを検出する電源オフ検出回路と、 遅延回路の出力側に設けられて、電源オフ検出
回路から電源オフ検出信号を入力したとき、遅延
回路のコンデンサを小抵抗を介して所定電位と接
続しコンデンサの放電を行わせるドライバと、 を備えたことを特徴とするオーデイオアンプ。 (2) オーデイオアンプは、アンプ終段に設けた
過電流検出回路と、遅延回路の出力側に設けられ
て、過電流検出回路から過電流検出信号を入力し
たとき、遅延回路のコンデンサを小抵抗を介して
所定電位と接続しコンデンサの放電を行わせるド
ライバと、を含み、電源オフ検出回路の出力側に
設けられたドライバと、過電流検出回路の出力側
に設けられたドライバを共用したこと、 を特徴とする請求項１記載のオーデイオアンプ。[Claims for Utility Model Registration] A rectifier circuit that rectifies the AC power supply on the secondary side of a power switch, a delay circuit that includes a resistor and a capacitor and delays the output of the rectifier circuit, and a first-stage amplifier circuit based on the output of the delay circuit. An audio amplifier that includes a power supply control circuit that turns on and off the power supply to the A class amplifier, a power-off detection circuit that is provided on the output side of the rectifier circuit and that detects when the AC power supply is turned off, and a delay circuit. A driver is provided on the output side and connects the capacitor of the delay circuit to a predetermined potential via a small resistor to discharge the capacitor when a power-off detection signal is input from the power-off detection circuit. Featured audio amplifier. (2) The audio amplifier has an overcurrent detection circuit installed at the final stage of the amplifier and an output side of the delay circuit.When an overcurrent detection signal is input from the overcurrent detection circuit, the capacitor of the delay circuit is a driver that is connected to a predetermined potential through a capacitor to discharge the capacitor, and the driver provided on the output side of the power-off detection circuit and the driver provided on the output side of the overcurrent detection circuit are shared. , The audio amplifier according to claim 1, characterized in that: .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020590U JP2530028Y2 (en) | 1990-02-27 | 1990-02-27 | Audio amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020590U JP2530028Y2 (en) | 1990-02-27 | 1990-02-27 | Audio amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03111016U true JPH03111016U (en) | 1991-11-14 |
| JP2530028Y2 JP2530028Y2 (en) | 1997-03-26 |
Family
ID=31523303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2020590U Expired - Lifetime JP2530028Y2 (en) | 1990-02-27 | 1990-02-27 | Audio amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2530028Y2 (en) |
-
1990
- 1990-02-27 JP JP2020590U patent/JP2530028Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2530028Y2 (en) | 1997-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH03111016U (en) | ||
| JPH0440313U (en) | ||
| JPH045715U (en) | ||
| JPH0223112U (en) | ||
| JPH0124971Y2 (en) | ||
| JPH0356238U (en) | ||
| JPS6383815U (en) | ||
| JPH0244432U (en) | ||
| JPH028214U (en) | ||
| JPH0480120U (en) | ||
| JPH0311392U (en) | ||
| JPH01122616U (en) | ||
| JPH0415076U (en) | ||
| JPS6079835U (en) | Electronic switch overcurrent detection circuit | |
| JPS6178313U (en) | ||
| JPH0282124U (en) | ||
| JPH02108230U (en) | ||
| JPH01159413U (en) | ||
| JPH0222533U (en) | ||
| JPS60181940U (en) | AM/FM stereo receiver | |
| JPS6413819U (en) | ||
| JPH0458720U (en) | ||
| JPH03106834U (en) | ||
| JPS619908U (en) | Muting circuit | |
| JPH0480195U (en) |