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    • 4. 发明公开
    • 음성 신호 출력 장치
    • 模拟IC的音频信号输出装置
    • KR1020050019050A
    • 2005-02-28
    • KR1020040063141
    • 2004-08-11
    • 로무 가부시키가이샤
    • 이나가키료스케
    • H03F3/68
    • H03F1/308H03F3/3018H03F3/3064
    • PURPOSE: An audio signal output device is provided to suppress noise from a digital IC wrapping around an analog IC via a power supply voltage. CONSTITUTION: The first input stage amplifier(2) is used for inverting and amplifying an audio signal. The first output stage amplifier(3) is used for current-amplifying an output signal of the first input stage amplifier to drive one terminal of a drive input of a speaker. The second input stage amplifier(4) is used for inverting the output signal of the first output stage amplifier. The second output stage amplifier(5) is used for current-amplifying an output signal of the second input stage amplifier to drive the other terminal of the drive input of the speaker. A regulator(10) is connected to a power supply voltage and outputs a predetermined constant voltage lower than the power supply voltage. The first and second input stage amplifiers employ the regulator as a power supply source and the first and second output stage amplifiers employ the power supply voltage as the power supply source.
    • 目的:提供音频信号输出装置,以通过电源电压来抑制来自模拟IC周围的数字IC的噪声。 构成:第一个输入级放大器(2)用于反相和放大音频信号。 第一输出级放大器(3)用于对第一输入级放大器的输出信号进行电流放大以驱动扬声器的驱动输入的一个端子。 第二输入级放大器(4)用于反转第一输出级放大器的输出信号。 第二输出级放大器(5)用于对第二输入级放大器的输出信号进行电流放大以驱动扬声器的驱动输入的另一端。 调节器(10)连接到电源电压并输出低于电源电压的预定恒定电压。 第一和第二输入级放大器采用调节器作为电源,第一和第二输出级放大器采用电源电压作为电源。