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1. 发明授权

US09357296B2 Switchable attenuation circuit for MEMS microphone systems 有权
标题翻译：用于MEMS麦克风系统的可切换衰减电路
公开(公告)号：US09357296B2
公开(公告)日：2016-05-31
申请号：US14099078
申请日：2013-12-06
申请人： Invensense, Inc.
发明人： Olafur Mar Josefsson , Jens Gaarde Henriksen
IPC分类号： H04B15/00 , H04R3/00 , H04R3/06 , H04R19/00 , H04R19/01 , H04R19/04
CPC分类号： H04R3/00 , H04R3/06 , H04R19/005 , H04R19/016 , H04R19/04
摘要： A switch control circuit monitors a signal produced by a MEMS or other capacitor microphone. When a criterion is met, for example when the amplitude of the monitored signal exceeds a threshold or the monitored signal has been clipped or analysis of the monitored signal indicates clipping is imminent or likely, the switch control circuit operates one or more switches so as to selectively connect one or more capacitors to a signal line from the microphone, i.e., so as to connect a selected capacitance to the signal line to attenuate the signal from the microphone and, therefore, avoid clipping. The switches may be MOSFET, MEMS or other types of switches co-located with the microphone in a common semiconductor package. Similarly, the capacitors, a circuit that processes the signals from the microphone and/or the switch control circuit may be co-located with the microphone in a common semiconductor package.
摘要翻译：开关控制电路监视由MEMS或其他电容器麦克风产生的信号。当满足标准时，例如当监视信号的幅度超过阈值或被监视信号被限幅或者监视信号的分析指示剪切即将或可能时，开关控制电路操作一个或多个开关，以便选择性地将一个或多个电容器连接到来自麦克风的信号线，即，将所选择的电容连接到信号线以衰减来自麦克风的信号，并因此避免限幅。这些开关可以是MOSFET，MEMS或其它类型的开关，其与麦克风在共同的半导体封装中共同定位。类似地，电容器，处理来自麦克风和/或开关控制电路的信号的电路可以与公共半导体封装中的麦克风共同定位。

2. 发明申请

US20140093102A1 SWITCHABLE ATTENUATION CIRCUIT FOR MEMS MICROPHONE SY 有权
标题翻译： MEMS麦克风SY的可切换衰减电路
公开(公告)号：US20140093102A1
公开(公告)日：2014-04-03
申请号：US14099078
申请日：2013-12-06
申请人： Invensense, Inc.
发明人： Olafur Mar Josefsson , Jens Gaarde Henriksen
IPC分类号： H04R3/00
CPC分类号： H04R3/00 , H04R3/06 , H04R19/005 , H04R19/016 , H04R19/04
摘要： A switch control circuit monitors a signal produced by a MEMS or other capacitor microphone. When a criterion is met, for example when the amplitude of the monitored signal exceeds a threshold or the monitored signal has been clipped or analysis of the monitored signal indicates clipping is imminent or likely, the switch control circuit operates one or more switches so as to selectively connect one or more capacitors to a signal line from the microphone, i.e., so as to connect a selected capacitance to the signal line to attenuate the signal from the microphone and, therefore, avoid clipping. The switches may be MOSFET, MEMS or other types of switches co-located with the microphone in a common semiconductor package. Similarly, the capacitors, a circuit that processes the signals from the microphone and/or the switch control circuit may be co-located with the microphone in a common semiconductor package.
摘要翻译：开关控制电路监视由MEMS或其他电容器麦克风产生的信号。当满足标准时，例如当监视信号的幅度超过阈值或被监视信号被限幅或者监视信号的分析指示剪切即将或可能时，开关控制电路操作一个或多个开关，以便选择性地将一个或多个电容器连接到来自麦克风的信号线，即，将所选择的电容连接到信号线以衰减来自麦克风的信号，并因此避免限幅。这些开关可以是MOSFET，MEMS或其它类型的开关，其与麦克风在共同的半导体封装中共同定位。类似地，电容器，处理来自麦克风和/或开关控制电路的信号的电路可以与公共半导体封装中的麦克风共同定位。

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