公开(公告)号：US20250104687A1

公开(公告)日：2025-03-27

申请号：US18895319

申请日：2024-09-24

Applicant: Apple Inc.

Inventor： Christopher C. Painter ,  Axit H. Patel ,  Joshua D. Atkins ,  Moshe H. Malkin ,  Nicholas C. Soldner ,  Robert D. Silfvast ,  Zhengrong Shang ,  Timo Birnschein ,  Qinghung Lee

IPC: G10K11/178

Abstract: Embodiments are disclosed for active cancellation of noise in motion sensor signals. In some embodiments, a method comprises: obtaining a motion sensor signal from a motion sensor; obtaining a reference signal indicative of parasitic vibration from a vibration source mechanically coupled to the motion sensor; generating, using an adaptive noise canceller, an estimate of the parasitic vibration; and using the estimated parasitic vibration to cancel the parasitic vibration from the motion sensor signal.

公开(公告)号：US11346855B2

公开(公告)日：2022-05-31

申请号：US17033563

申请日：2020-09-25

Applicant: Apple Inc.

Inventor： Qinghung Lee ,  Christopher C. Painter

IPC: G01P21/00 ,  G01P1/02 ,  G01P15/125 ,  H04W88/02

Abstract: According to some aspects of the subject technology, an apparatus includes an accelerometer including one or more sense electrodes to sense an input acceleration, and an unstick device to free the accelerometer from a stuck state due to a saturating acceleration input. The unstick device includes at least one unstick electrode and a control circuitry to cause the unstick electrode to generate vibrational energy to free the accelerometer.

公开(公告)号：US20220099701A1

公开(公告)日：2022-03-31

申请号：US17033563

申请日：2020-09-25

Applicant: Apple Inc.

Inventor： Qinghung Lee ,  Christopher C. Painter

IPC: G01P21/00 ,  G01P15/125 ,  G01P1/02

Abstract: According to some aspects of the subject technology, an apparatus includes an accelerometer including one or more sense electrodes to sense an input acceleration, and an unstick device to free the accelerometer from a stuck state due to a saturating acceleration input. The unstick device includes at least one unstick electrode and a control circuitry to cause the unstick electrode to generate vibrational energy to free the accelerometer.