公开(公告)号：US20150289073A1

公开(公告)日：2015-10-08

申请号：US14168983

申请日：2014-01-30

Applicant: InvenSense, Inc.

Inventor： James SALVIA ,  Baris CAGDASER ,  Aleksey S. KHENKIN

IPC: H04R29/00 ,  G01H17/00

CPC classification number: H04R29/004 ,  G01H17/00 ,  G01V13/00 ,  H04R19/005 ,  H04R19/04 ,  H04R2201/003

Abstract: A method and circuit for testing an acoustic sensor are disclosed. In a first aspect, the method comprises using electro-mechanical features of the acoustic sensor to measure characteristic of the acoustic sensor. In a second aspect, the method comprises utilizing an actuation signal to evaluate mechanical characteristics of the acoustic sensor. In a third aspect, the method comprises using a feedthrough cancellation system to measure a capacitance of the acoustic sensor. In the fourth aspect, the circuit comprises a mechanism for driving an electrical signal into a signal path of the acoustic sensor to cancel an electrical feedthrough signal provided to the signal path, wherein any of the electrical signal and the electrical feedthrough signal are within or above an audio range.

Abstract translation: 公开了一种用于测试声学传感器的方法和电路。 在第一方面，该方法包括使用声传感器的机电特征来测量声传感器的特性。 在第二方面，该方法包括利用致动信号来评估声传感器的机械特性。 在第三方面，该方法包括使用馈通消除系统来测量声学传感器的电容。 在第四方面，该电路包括用于将电信号驱动到声学传感器的信号路径中以抵消提供给信号路径的电馈通信号的机构，其中电信号和电馈通信号中的任何一个在或之内 一个音频范围。

公开(公告)号：US20170251316A1

公开(公告)日：2017-08-31

申请号：US15598214

申请日：2017-05-17

Applicant: INVENSENSE, Inc.

Inventor： James SALVIA ,  Baris CAGDASER ,  Aleksey S. KHENKIN

IPC: H04R29/00 ,  H04R19/04 ,  H04R19/00 ,  G01H17/00

Abstract: A method and circuit for testing an acoustic sensor are disclosed. In a first aspect, the method comprises using electro-mechanical features of the acoustic sensor to measure characteristic of the acoustic sensor. In a second aspect, the method comprises utilizing an actuation signal to evaluate mechanical characteristics of the acoustic sensor. In a third aspect, the method comprises using a feedthrough cancellation system to measure a capacitance of the acoustic sensor. In the fourth aspect, the circuit comprises a mechanism for driving an electrical signal into a signal path of the acoustic sensor to cancel an electrical feedthrough signal provided to the signal path, wherein any of the electrical signal and the electrical feedthrough signal are within or above an audio range.