会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 17. 发明授权
    • Microphone component and method for operating same
    • 麦克风组件及其操作方法
    • US08861765B2
    • 2014-10-14
    • US13147116
    • 2010-01-15
    • Thomas BuckFranz Laermer
    • Thomas BuckFranz Laermer
    • H04R3/00H04R19/01
    • H04R3/007H04R19/016
    • A system and method are described for reducing the current consumption of a microphone component without adversely affecting performance. The system includes a micromechanical microphone capacitor, an acoustically inactive compensation capacitor, an arrangement for applying a high-frequency sampling signal to the microphone capacitor and for applying the inverted sampling signal to the compensation capacitor, an integrating operational amplifier which integrates the sum of the current flow through the microphone capacitor and the current flow through the compensation capacitor as a charge amplifier, a demodulator, which is synchronized with the sampling signal, for the output signal of the integrating operational amplifier, and a low-pass filter which uses the output signal of the demodulator to obtain a microphone signal that corresponds to the changes in capacitance of the microphone capacitor. The sampling signal is composed of a periodic sequence of sampling pulses and pause times. In addition, at least one first switching element is provided which reduces the current flow through the integrating operational amplifier during the pause times. The low-pass filter has a “sample-and-hold” characteristic so that during the pause times the low-pass filter in each case stores the output signal of the integrating operational amplifier averaged over the preceding sampling operation.
    • 描述了一种用于降低麦克风组件的电流消耗而不会不利地影响性能的系统和方法。 该系统包括微机械麦克风电容器,声学无效补偿电容器,用于向麦克风电容器施加高频采样信号并将反相采样信号施加到补偿电容器的装置,积分运算放大器,其将 通过麦克风电容器的电流流过作为电荷放大器的补偿电容器的电流,与采样信号同步的解调器,用于积分运算放大器的输出信号,以及使用该输出的低通滤波器 解调器的信号以获得对应于麦克风电容器的电容变化的麦克风信号。 采样信号由采样脉冲和暂停时间的周期序列组成。 此外,提供至少一个第一开关元件,其在暂停时间期间减少通过积分运算放大器的电流。 低通滤波器具有“采样和保持”特性,使得在暂停时间期间,低通滤波器在每种情况下存储在先前采样操作上平均的积分运算放大器的输出信号。