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    • 10. 发明授权
    • Microphone amplifier
    • 麦克风放大器
    • US08897460B2
    • 2014-11-25
    • US13330285
    • 2011-12-19
    • Thomas FroehlichWolfgang Duenser
    • Thomas FroehlichWolfgang Duenser
    • H04R3/00H03F1/52H03F3/187
    • H03F3/187H03F1/523H03F2200/03H03F2200/78
    • A microphone amplifier comprises an input terminal (E100) for applying an input signal (IN), an output terminal (A100a) for outputting an output signal (OUT), and an additional output terminal (A100b) for outputting an additional output signal (VBIAS). The microphone amplifier also contains an amplifying circuit (10) for generating the output signal (OUT) by amplifying the input signal (IN), wherein the amplifying circuit (10) is connected between the input terminal (E100) and the output terminal (A100a), and a voltage generator (30) for generating the additional output signal (VBIAS). A supply voltage terminal (V30) of the voltage generator (30) is connected to the output terminal (A100a) of the microphone amplifier. Since the amplifying circuit (10) makes available a supply voltage (V) for the voltage generator (30), the microphone amplifier can be operated without a separate supply voltage terminal.
    • 麦克风放大器包括用于施加输入信号(IN)的输入端(E100),用于输出输出信号(OUT)的输出端(A100a)和用于输出附加输出信号(VBIAS)的附加输出端(A100b) )。 麦克风放大器还包括用于通过放大输入信号(IN)来产生输出信号(OUT)的放大电路(10),其中放大电路(10)连接在输入端(E100)和输出端(A100a )和用于产生附加输出信号(VBIAS)的电压发生器(30)。 电压发生器(30)的电源电压端子(V30)连接到麦克风放大器的输出端子(A100a)。 由于放大电路(10)为电压发生器(30)提供电源电压(V),所以麦克风放大器可以在没有单独的电源电压端子的情况下工作。