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公开(公告)号：US20220333957A1
公开(公告)日：2022-10-20
申请号：US17345778
申请日：2021-06-11
申请人： INVENSENSE, INC.
摘要： The described technology is generally directed towards a sensor output digitizer. The sensor output digitizer can comprise a multiplexer stage, a multi-stage analog to digital converter, and a digital output combiner. The multiplexer stage can be configured to sequentially select sensor outputs from one or more sensors, resulting in a stream of selected sensor outputs. The multi-stage analog to digital converter can be coupled with the multiplexer stage, and can be configured to convert the stream of selected sensor outputs into a stream of digitized outputs. The digital output combiner can be configured to re-scale and sum intermediate outputs of the multi-stage analog to digital converter to produce a stream of digitized sensor outputs.
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公开(公告)号：US11933648B2
公开(公告)日：2024-03-19
申请号：US17345778
申请日：2021-06-11
申请人： INVENSENSE, INC.
摘要： The described technology is generally directed towards a sensor output digitizer. The sensor output digitizer can comprise a multiplexer stage, a multi-stage analog to digital converter, and a digital output combiner. The multiplexer stage can be configured to sequentially select sensor outputs from one or more sensors, resulting in a stream of selected sensor outputs. The multi-stage analog to digital converter can be coupled with the multiplexer stage, and can be configured to convert the stream of selected sensor outputs into a stream of digitized outputs. The digital output combiner can be configured to re-scale and sum intermediate outputs of the multi-stage analog to digital converter to produce a stream of digitized sensor outputs.
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公开(公告)号：US20170168088A1
公开(公告)日：2017-06-15
申请号：US15370385
申请日：2016-12-06
申请人： InvenSense, Inc.
发明人： Luca Coronato , Giacomo Gafforelli , Adolfo Giambastiani , Federico Mazzarella , Massimiliano Musazzi , Michele Folz
IPC分类号： G01P21/00 , G01P15/125
CPC分类号： G01P21/00 , G01P15/125
摘要： An accelerometer has a plurality of proof masses and a plurality of sense electrodes, which collectively form at least two capacitors. A first sense drive signal is applied to a first capacitor and a second sense drive signal is applied to a second capacitor. Both of the sense drive signals have the same sense drive frequency. Capacitance signals are sensed from each of the first capacitor and second capacitor, and a common mode component of the capacitance signals is determined. A capacitor error is identified based on the common mode component.
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公开(公告)号：US10725068B2
公开(公告)日：2020-07-28
申请号：US15363522
申请日：2016-11-29
申请人： InvenSense, Inc.
发明人： Giacomo Gafforelli , Luca Coronato , Adolfo Giambastiani , Federico Mazzarella , Massimiliano Musazzi , Michele Folz
IPC分类号： G01P21/00 , G01P15/125
摘要： A microelectromechanical (MEMS) accelerometer has a proof mass, a sense electrode, and an auxiliary electrode. The sense electrode is located relative to the proof mass such that a capacitance formed by the sense electrode and the proof mass changes in response to a linear acceleration along a sense axis of the accelerometer. The auxiliary electrode is located relative to the proof mass such that a capacitance formed by the auxiliary electrode and proof mass is static in response to the linear acceleration. A sense drive signal is applied at the sense electrode and an auxiliary drive signal is applied at the auxiliary electrode. The sense drive signal and the auxiliary drive signal have different frequencies. An error is identified based on a portion of a signal that is received from the accelerometer and that is responsive to the auxiliary drive signal. Compensation is performed at the accelerometer based on the identified error.
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