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1. 发明申请

US20160157017A1 SIGNAL PROCESSING FOR MEMS CAPACITIVE TRANSDUCERS 有权
标题翻译：用于MEMS电容式传感器的信号处理
公开(公告)号：US20160157017A1
公开(公告)日：2016-06-02
申请号：US14787052
申请日：2014-04-23
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LIMITED
发明人： John Paul Lesso , Emmanuel Philippe Christian Hardy , James Thomas Deas , Toru Ido
IPC分类号： H04R3/06 , H04R19/04 , H03M1/06 , H04R19/00
CPC分类号： H04R3/06 , G01D3/02 , G01D5/24 , G01D5/24476 , G01P15/125 , G01P2015/0865 , H03M1/0609 , H03M1/12 , H03M3/352 , H03M3/458 , H04R19/005 , H04R19/04 , H04R29/004 , H04R2201/003 , H04R2499/11
摘要： This application relates to circuitry for processing sense signals generated by MEMS capacitive transducers for compensating for distortion in such sense signals. The circuitry has a signal path between an input (204) for receiving the sense signal and an output (205) for outputting an output signal based on said sense signal. Compensation circuitry (206, 207) is configured to monitor the signal at a first point along the signal path and generate a correction signal (Scorr); and modify the signal at at least a second point along said signal path based on said correction signal. The correction signal is generated as a function of the value of the signal at the first point along the signal path so as to introduce compensation components into the output signal that compensate for distortion components in the sense signal. The first point in the signal path may be before or after the second point in the signal path. The monitoring may be performed in an analogue or a digital part of the signal path and in either case the modification may be applied in an analogue or a digital part of the signal path.
摘要翻译：本申请涉及用于处理由MEMS电容换能器产生的感测信号以补偿这种感测信号中的失真的电路。电路具有用于接收感测信号的输入端（204）和用于基于所述感测信号输出输出信号的输出端（205）之间的信号路径。补偿电路（206,207）被配置为在沿着信号路径的第一点处监视信号并产生校正信号（Scorr）; 并且基于所述校正信号沿着所述信号路径在至少第二点处修改信号。校正信号作为沿着信号路径的第一点处的信号的值的函数产生，以便将补偿分量引入补偿感测信号中的失真分量的输出信号中。信号路径中的第一点可以在信号路径中的第二点之前或之后。可以在信号路径的模拟或数字部分中执行监视，并且在任一情况下，修改可以应用于信号路径的模拟或数字部分。

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