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    • 10. 发明申请
    • AN ULTRA-LOW-POWER ULTRA-LOW-NOISE MICROPHONE
    • 超低功耗超低噪声麦克风
    • WO2017009769A1
    • 2017-01-19
    • PCT/IB2016/054136
    • 2016-07-11
    • WIZEDSP LTD.
    • GABAI, Oz
    • H04R3/06H04R19/01H03F3/45
    • H04R19/04H03F1/56H03F3/185H03F3/1855H03F3/45H03F3/45475H03F2200/03H03F2200/18H03F2200/294H04R3/00H04R19/005H04R19/01H04R2410/03H04R2499/11
    • A microphone circuit including a JFET or MOSFET transistor, a terminal of an input-impedance-network connected to the transistor's gate, one terminal of a source resistor connected to the transistor's source, and another terminal connected to ground, a bypass capacitor connected in parallel to the source resistor, one terminal of a load resistor connected to the transistor's drain, a charge-pump generating low-voltage connected to the second terminal of the load resistor, and an inverted voltage connected to a power supply terminal of an op amplifier, one input of the op-amplifier connected to the source terminal of the transistor through a bi-directional low-pass-filter, another input connected to a reference voltage, one power supply terminal connected to the inverted voltage, another power supply terminal connected to main supply voltage, an output terminal connected to another terminal of the input-impedance-network through a low pass filter, where the input-impedance-network connected to a microphone.
    • 包括JFET或MOSFET晶体管的麦克风电路,连接到晶体管栅极的输入阻抗网络的端子,连接到晶体管源极的源极电阻的一个端子和连接到地的另一个端子,并联的旁路电容器 连接到晶体管漏极的负载电阻器的一个端子,连接到负载电阻器的第二端子的电荷泵产生低电压,以及连接到运算放大器的电源端子的反相电压, 通过双向低通滤波器连接到晶体管的源极端子的运算放大器的一个输入,连接到参考电压的另一个输入,连接到反相电压的一个电源端子,连接到反相电压的另一个电源端子 主电源电压,通过低通滤波器连接到输入阻抗网络的另一端的输出端,其中输入阻抗网络连接 连接到麦克风。