AMPLIFIER, AUDIO DEVICE AND CONTROL METHOD

The invention provides an amplifier reducing sound energy absorption, an audio device and a control method for controlling the amplifier. The amplifier includes a power amplifier that amplifies an input signal, a VI detection circuit that is connected to a rear stage of the power amplifier to detect...

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Bibliographische Detailangaben
1. Verfasser:	GOTO MITSUTAKA
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AMPLIFIERS BASIC ELECTRONIC CIRCUITRY CONTROL OF AMPLIFICATION DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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Beschreibung
Zusammenfassung:	The invention provides an amplifier reducing sound energy absorption, an audio device and a control method for controlling the amplifier. The amplifier includes a power amplifier that amplifies an input signal, a VI detection circuit that is connected to a rear stage of the power amplifier to detect power of an output signal of the power amplifier, and a controller that turns on the power amplifier when the input signal is inputted to the power amplifier, turns off the power amplifier when the input signal is not inputted to the power amplifier, and turns on the power amplifier when the VI detection circuit detects a voltage that exceeds a predetermined value when the power amplifier is in off state. 提供减少声能的吸收的放大器、音响设备及对放大器进行控制的控制方法。放大器具有：放大单元，其对输入信号进行放大；VI检测电路，其连接在所述放大单元的后级，对所述放大单元的输出信号的电力进行检测；以及控制部，其在所述输入信号输入至所述放大单元的情况下将所述放大单元接通，在所述输入信号没有输入至所述放大单元的情况下将所述放大单元断开，在所述放大单元断开的情况下，在所述VI检测电路检测到大于或等于规定值的电压的情况下将所述放大单元接通。