公开(公告)号：US20230314257A1

公开(公告)日：2023-10-05

申请号：US18169818

申请日：2023-02-15

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Enri DUQI ,  Patrick FEDELI ,  Nicolo' MANCA ,  Silvia ADORNO

IPC: G01L27/00

CPC classification number: G01L27/005 ,  H02J50/10

Abstract: Method for determining a first and a second calibrated value of atmospheric pressure, performed by an electronic apparatus comprising a fixed device and a first and a second movable device comprising respectively a first and a second movable barometer. The method comprises: determining whether the movable devices are being inductively charged by the fixed device; if so, acquiring respective measured values of atmospheric pressure through the movable barometers, and a reference value of atmospheric pressure in a common reference point of the electronic apparatus, the movable barometers being at respective predefined height differences with respect to the common reference point; calculating respective pressure differences as a function of the measured values of atmospheric pressure and of the reference value of atmospheric pressure; and when the movable devices are not being charged, acquiring new measured values of atmospheric pressure through the movable barometers, and determining the respective calibrated values of atmospheric pressure as a function of the new measured values of atmospheric pressure and of the pressure differences.

公开(公告)号：US20230266356A1

公开(公告)日：2023-08-24

申请号：US17675501

申请日：2022-02-18

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Francesco RIZZINI ,  Nicolo' MANCA ,  Cristian DALL'OGLIO

IPC: G01P15/125 ,  B81B7/02 ,  G01P15/18

CPC classification number: G01P15/125 ,  B81B7/02 ,  G01P15/18 ,  B81B2201/0235 ,  G01P2015/082

Abstract: The present disclosure is directed to micro-electromechanical system (MEMS) accelerometers that are configured for a user interface mode and a true wireless stereo (TWS) mode of an audio device. The accelerometers are fabricated with specific electromechanical parameters, such as mass, stiffness, active capacitance, and bonding pressure. As a result of the specific electromechanical parameters, the accelerometers have a resonance frequency, quality factor, sensitivity, and Brownian noise density that are suitable for both the user interface mode and the TWS mode.

公开(公告)号：US20240027490A1

公开(公告)日：2024-01-25

申请号：US18480358

申请日：2023-10-03

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Francesco RIZZINI ,  Nicolo' MANCA ,  Cristian DALL'OGLIO

IPC: G01P15/125 ,  B81B7/02 ,  G01P15/18

CPC classification number: G01P15/125 ,  B81B7/02 ,  G01P15/18 ,  G01P2015/082

Abstract: The present disclosure is directed to micro-electromechanical system (MEMS) accelerometers that are configured for a user interface mode and a true wireless stereo (TWS) mode of an audio device. The accelerometers are fabricated with specific electromechanical parameters, such as mass, stiffness, active capacitance, and bonding pressure. As a result of the specific electromechanical parameters, the accelerometers have a resonance frequency, quality factor, sensitivity, and Brownian noise density that are suitable for both the user interface mode and the TWS mode.

公开(公告)号：US20230266357A1

公开(公告)日：2023-08-24

申请号：US18169142

申请日：2023-02-14

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Gabriele GATTERE ,  Francesco RIZZINI ,  Nicolo' MANCA

IPC: G01P15/125 ,  B81B3/00

CPC classification number: G01P15/125 ,  B81B3/0027 ,  B81B2201/0235 ,  G01P2015/0814

Abstract: Micromechanical device comprising: a semiconductor body; a movable structure configured to oscillate relative to the semiconductor body along an oscillation direction; and an elastic assembly with an elastic constant, coupled to the movable structure and to the semiconductor body and configured to deform along the oscillation direction to allow the oscillation of the movable structure as a function of an acceleration applied to the micromechanical device. The movable structure and the semiconductor body comprise a control structure for the capacitive control of the oscillation of the movable structure: when the control structure is electrically controlled in a first state the micromechanical device is in a first operating mode wherein a total elastic constant of the micromechanical device has a first value, and when it is electrically controlled in a second state the micromechanical device is in a second operating mode wherein the total elastic constant has a second value lower than, or equal to, the first value.