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    • 63. 发明授权
    • Noise canceler
    • 噪音消除器
    • US5406149A
    • 1995-04-11
    • US45011
    • 1993-04-09
    • Hyeong-keon AnYoung-ho ShinSuk-ki Kim
    • Hyeong-keon AnYoung-ho ShinSuk-ki Kim
    • H03K5/1252G10K11/178H03H17/00H04B15/00H03B1/04
    • G10K11/1784G10K2210/3013G10K2210/30232G10K2210/3031G10K2210/3033G10K2210/3045G10K2210/3055
    • In a noise canceler, a pilot-canceling signal without noise is applied to the inverting input of a subtracter via a first MOS transistor. When a noise signal is present, a pilot signal and noise signal passing through a capacitor are applied to the inverting input port of the subtracter via a second MOS transistor to cancel the noise signal contained in the composite input signal. In the canceler, external noise may be digitally converted and the inverted noise thereof stored in a memory. When a noise signal detector detects the external noise, inverted data corresponding to the external noise is output from the memory. The detector enables an address generator to continuously generate addresses. The memory reads out inverted noise patterns which are converted into analog form and transmitted via a speaker, thereby canceling noises produced by various electrical and electronic appliances as well as nearby automobiles and aircraft.
    • 在噪声消除器中,无噪声的导频消除信号经由第一MOS晶体管施加到减法器的反相输入端。 当存在噪声信号时,通过电容器的导频信号和噪声信号经由第二MOS晶体管施加到减法器的反相输入端口,以消除复合输入信号中包含的噪声信号。 在消除器中,外部噪声可能被数字转换,并将其反相噪声存储在存储器中。 当噪声信号检测器检测到外部噪声时,从存储器输出对应于外部噪声的反转数据。 检测器使地址发生器能够连续地生成地址。 存储器读出被转换为模拟形式并通过扬声器发送的反相噪声模式,从而消除由各种电气和电子设备以及附近的汽车和飞行器产生的噪声。