公开(公告)号：US20250147176A1

公开(公告)日：2025-05-08

申请号：US18940502

申请日：2024-11-07

Applicant: INVENSENSE, INC.

Inventor： Richard Przybyla ,  Daniela Hall ,  Mitchell Kline

IPC: G01S15/12 ,  G01S7/52 ,  G01S7/539 ,  G06F1/3231 ,  G06F1/3234 ,  G06N3/0442 ,  G06N20/20

Abstract: Devices and methods are provided that facilitate proximity or liveness detection of a user of a wearable device or a user interacting with a device based on ultrasonic information. In various embodiments, machine learning classifier models can be employed to generate classification predictions of a donned or a doffed state of a wearable device. In various aspects, a gated-recurrent unit (GRU) recursive neural network (RNN) can be employed as a machine learning classifier model. In other aspects, a liveness detection classifier decision tree can be employed as a machine learning classifier model. Power states or operating modes for associated devices can be selected based on the proximity or liveness of the user of the wearable device, as an example.

公开(公告)号：US12289536B2

公开(公告)日：2025-04-29

申请号：US17992801

申请日：2022-11-22

Applicant: INVENSENSE, INC.

Inventor： Sebastien Riccardi ,  Pierre Grenet ,  Jerome Lachaux

IPC: H04N23/80 ,  H04N23/68 ,  H04N23/81

Abstract: Systems and methods are disclosed for capturing stabilized images. Motion of the mobile device is determined so that the relative position of the lens and image sensor may be adjusted to compensate for unintended motion. The relative position of the lens and image sensor may be periodically reset in response to a synchronization signal in between capturing images.

公开(公告)号：US12258266B2

公开(公告)日：2025-03-25

申请号：US17877089

申请日：2022-07-29

Applicant: InvenSense, Inc.

Inventor： Daesung Lee ,  Alan Cuthbertson

IPC: B81C1/00 ,  B81B3/00 ,  B81B7/00 ,  B81B7/02

Abstract: A method includes forming a bumpstop from a first intermetal dielectric (IMD) layer and forming a via within the first IMD, wherein the first IMD is disposed over a first polysilicon layer, and wherein the first polysilicon layer is disposed over another IMD layer that is disposed over a substrate. The method further includes depositing a second polysilicon layer over the bumpstop and further over the via to connect to the first polysilicon layer. A standoff is formed over a first portion of the second polysilicon layer, and wherein a second portion of the second polysilicon layer is exposed. The method includes depositing a bond layer over the standoff.

公开(公告)号：US12255598B2

公开(公告)日：2025-03-18

申请号：US17379089

申请日：2021-07-19

Applicant: INVENSENSE, INC.

Inventor： Stefano Cappello

IPC: H03H17/06

Abstract: An interleaved cascaded integrator-comb (“CIC”) filter receives an interleaved sensor output signal, including a plurality of digitized sensor signals at an input clock rate. An integrator of the interleaved CIC filter processes the interleaved signal to output an integrated interleaved signal. A downsampler of the interleaved CIC filter buffers portions of the integrated interleaved corresponding to a decimation rate for the interleaved signal. The portions of the signals are provided to a comb filter, which outputs a decimated interleaved signal.

公开(公告)号：US12253401B2

公开(公告)日：2025-03-18

申请号：US17707688

申请日：2022-03-29

Applicant: InvenSense, Inc.

Inventor： Cristabel Yang ,  Richard J. Przybyla ,  Mitchell Kline

IPC: G01F23/2962 ,  G01F23/20 ,  G01F23/296 ,  G01F25/20

Abstract: Systems and methods for ultrasonic liquid level sensing. A circuit causes an ultrasonic transducer to transmit a sequence of ultrasonic pulses and receive a sequence of reflected signals. Each reflected signal includes at least one first reflection associated with at least one non-moveable surface and at least one second reflection associated with a moveable surface. A digital controller, for each reflected signal: determines at least one of a magnitude and a variance of the respective signal to form at least one output signal, identifies, in the at least one output signal, at least one first pulse indicative of the at least one non-moveable surface and at least one second pulse indicative of the moveable surface, and determines a distance of the moveable surface relative to the at least one non-moveable surface based on the identified first and second pulses.

公开(公告)号：US20250080130A1

公开(公告)日：2025-03-06

申请号：US18240514

申请日：2023-08-31

Applicant: InvenSense, Inc.

Inventor： Vadim Tsinker

IPC: H03M1/38

Abstract: A continuous time reconfigurable integrator is dynamically reconfigurable to facilitate real time high-resolution modification of the integrator output signal. An initial output of the integrator is evaluated to generate a coarse estimate which is then used to modify capacitive inputs to the integrator, which result in the output of a residue signal. The initial and residue outputs are individually processed by an analog-to-digital converter (ADC), such as a successive-approximation-register ADC, and digitally combined.

公开(公告)号：US20250070735A1

公开(公告)日：2025-02-27

申请号：US18237533

申请日：2023-08-24

Applicant: InvenSense, Inc.

Inventor： Federico Mazzarella ,  Vadim Tsinker

IPC: H03F3/45 ,  H03M1/44

Abstract: In a microelectromechanical system (MEMS) sensor, movement of a component such as a proof mass due to a force of interest is sensed capacitively. A capacitance-to-voltage (C2V) converter receives a capacitance signal from the sensor and outputs a signal that includes an offset in addition to a signal of interest. The output signal is analyzed to identify the offset portion of the output signal and to modify values one or more variable capacitors coupled to the C2V input reduce the offset portion of the output signal.

公开(公告)号：US12238481B2

公开(公告)日：2025-02-25

申请号：US18359242

申请日：2023-07-26

Applicant: INVENSENSE, INC.

Inventor： Tomas Pitak ,  Igor Mucha ,  Robert Dick ,  Michael Tuttle

IPC: H04R19/04

Abstract: Acoustic activity detection is provided herein. Operations of a method can include receiving an acoustic signal at a micro-electromechanical system (MEMS) microphone. Based on portions of the acoustic signal being determined to exceed a threshold signal level, output pulses are generated. Further, the method can include extracting information representative of a frequency of the acoustic signal based on respective spacing between rising edges of the output pulses.

公开(公告)号：US12227409B2

公开(公告)日：2025-02-18

申请号：US17546928

申请日：2021-12-09

Applicant: InvenSense, Inc.

Inventor： Aurelio Pellegrini

IPC: B81B3/00 ,  G01P15/08

Abstract: An inertial sensor such as a MEMS accelerometer or gyroscope has a proof mass that is driven by a self-test signal, with the response of the proof mass to the self-test signal being used to determine whether the sensor is within specification. The self-test signal is provided as a non-periodic self-test pattern that does not correlate with noise such as environmental vibrations that are also experienced by the proof mass during the self-test procedure. The sense output signal corresponding to the proof mass is correlated with the non-periodic self-test signal, such that an output correlation value corresponds only to the proof mass response to the applied self-test signal.

公开(公告)号：US12199629B2

公开(公告)日：2025-01-14

申请号：US18107219

申请日：2023-02-08

Applicant: InvenSense, Inc.

Inventor： Omid Oliaei ,  Aurelio Pellegrini ,  Daniele Ottini

IPC: H03M1/10 ,  H03M3/00 ,  H03K19/20

Abstract: A circuit for a feedback system incorporates a gating mechanism to reduce flicker noise (e.g., a source for bias instability within a MEMS device) at a digital output. The gating mechanism generates a gating pulse with a delay period (e.g., a common, or fixed, delay including symmetrical rising and falling edge delays) that overrides internal delays (e.g., asymmetrical rising and falling edge delays) of a phase generator to prevent propagation delay (e.g., delay affected by jitter) from reaching subsequent feedback components (e.g., a digital-to-analog converter (DAC)) and contributing to the generation of flicker noise within the system.