AMPLIFIER DEVICE

An amplifier device includes an amplification unit and a bias module. The amplification unit has a first terminal coupled to a voltage source for receiving a power supply voltage, a second terminal for receiving an input signal, and a third terminal coupled to a first reference potential terminal. The first reference potential terminal is used for receiving a first reference potential. The first end of the amplifying unit is used for outputting the output signal amplified by the amplifying unit. The bias module is coupled to the second end of the amplifying unit and used for receiving the voltage signal to provide bias current to the amplifying unit. The votlage signal is a variable voltage. The supply current flows into the amplification unit and is adjusted according to the voltage signal so as to maintain the supply current within a predetermined range. 一种放大器装置包含放大单元及偏压模块。放大单元具有第一端，耦接于电压源，用以接收电源电压，第二端，用以接收输入信号，及第三端，耦接于第一参考电位端。第一参考电位端用以接收第一参考电位。放大单元的第一端用以输出经放大单元放大后的输出信号。偏压模块耦接于放大单元的第二端，用以接收电压信号以提供偏压电流至放大单元。