公开(公告)号：US20230045861A1

公开(公告)日：2023-02-16

申请号：US17871463

申请日：2022-07-22

Applicant: STMicroelectronics S.r.l.

Inventor： Fabio PASSANITI ,  Enrico Rosario ALESSI

IPC: B60W40/06 ,  B60W40/105 ,  G01R29/12 ,  G01R29/24

Abstract: A road condition detection device, to be coupled to the wheel of a vehicle, is provided with: an electrostatic charge variation sensor, to provide a charge variation signal indicative of an electrostatic charge variation associated with the rotation of the wheel; and a processing unit, coupled to the electrostatic charge variation sensor to receive the charge variation signal and furthermore for receiving a rotation speed signal indicative of the rotation speed of the wheel. In particular, the processing unit jointly processes the rotation speed signal and the charge variation signal to detect a road condition of a wet road condition and a dry road condition.

公开(公告)号：US11581808B2

公开(公告)日：2023-02-14

申请号：US17244406

申请日：2021-04-29

Applicant: STMicroelectronics S.r.l.

Inventor： Enrico Ferrara ,  Luca Morinelli

IPC: H02M3/158 ,  H02M1/08 ,  H02M3/156 ,  H02M1/00

Abstract: An embodiment buck converter control circuit comprises an error amplifier configured to generate an error signal based on a feedback signal and a reference signal, a pulse generator circuit configured to generate a pulsed signal having switching cycles set to high and low as a function of the error signal, a driver circuit configured to generate a drive signal for an electronic switch of the buck converter as a function of the pulsed signal, a variable load, connected between two output terminals of the buck converter, configured to absorb a current based on a control signal, and a detector circuit configured to monitor a first signal indicative of an output current provided by the buck converter and a second signal indicative of a negative transient of the output current, and verify whether the second signal indicates a negative transient of the output current.

公开(公告)号：US20230045064A1

公开(公告)日：2023-02-09

申请号：US17881473

申请日：2022-08-04

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Enrico Rosario ALESSI ,  Fabio PASSANITI ,  Nunziata Ivana GUARNERI

IPC: G10L15/22 ,  H04R1/46

Abstract: Voice command recognition and natural language recognition are carried out using an accelerometer that senses signals from the vibrations of one or more bones of a user and receives no audio input. Since word recognition is made possible using solely the signal from the accelerometer from a person's bone conduction as they speak, an acoustic microphone is not needed and thus not used to collect data for word recognition. According to one embodiment, a housing contains an accelerometer and a processor, both within the same housing. The accelerometer is preferably a MEMS accelerometer which is capable of sensing the vibrations that are present in the bone of a user as the user is speaking words. A machine learning algorithm is applied to the collected data to correctly recognize words spoken by a person with significant difficulties in creating audible language.

公开(公告)号：US20230036566A1

公开(公告)日：2023-02-02

申请号：US17868479

申请日：2022-07-19

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Daniele PRATI ,  Luca Giuseppe FALORNI ,  Luca GUERINONI

IPC: G01C19/5712

Abstract: The MEMS gyroscope is formed by a substrate, a first mass and a second mass, wherein the first and the second masses are suspended over the substrate and extend, at rest, in a plane of extension defining a first direction and a second direction transverse to the first direction. The MEMS gyroscope further has a drive structure coupled to the first mass and configured, in use, to cause a movement of the first mass in the first direction, and an elastic coupling structure, which extends between the first mass and the second mass and is configured to couple the movement of the first mass in the first direction with a movement of the second mass in the second direction. The elastic coupling structure has a first portion having a first stiffness and a second portion having a second stiffness greater than the first stiffness.

公开(公告)号：US20230029120A1

公开(公告)日：2023-01-26

申请号：US17958761

申请日：2022-10-03

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Mikel AZPEITIA URQUIA ,  Giorgio ALLEGATO

IPC: G01L19/06 ,  G01L9/08 ,  G01L9/12

Abstract: A semiconductor device for ambient sensing including: a cap traversed by a hole; and a main body mechanically coupled to the cap so as to delimit a cavity, which is interposed between the main body and the cap. The main body includes a semiconductor body and a coupling structure, which is interposed between the semiconductor body and the cap and laterally delimits a channel, which fluidically couples the cavity and the hole. The channel performs a mechanical filtering that is finer than the mechanical filtering performed by the hole.

公开(公告)号：US20230023062A1

公开(公告)日：2023-01-26

申请号：US17867170

申请日：2022-07-18

Applicant: STMicroelectronics S.r.l.

Inventor： Enrico Rosario ALESSI ,  Fabio PASSANITI ,  Michele Alessio DELLUTRI

IPC: G06F1/3231 ,  G06F1/3296 ,  G06F1/3234

Abstract: A control method of an apparatus is provided. The apparatus includes a control unit coupled to a proximity sensor to detect a first distance of a user in a field of view, and coupled to a charge variation sensor to detect an electric/electrostatic charge variation caused by the user in a detection region. The control method includes acquiring a charge variation signal and generating charge variation parameters as a function of the charge variation signal. The control method further includes determining whether a condition on charge variation parameters is verified, and if the condition on charge variation parameters is verified, activating the proximity sensor and acquiring a proximity signal. Proximity parameters are generated as a function of the proximity signal. If a condition on proximity parameters is verified, one or more functionalities of the apparatus are activated.

公开(公告)号：US11562950B2

公开(公告)日：2023-01-24

申请号：US17227030

申请日：2021-04-09

Applicant: STMicroelectronics S.r.l.

Inventor： Cristiano Gianluca Stella ,  Fabio Vito Coppone ,  Francesco Salamone

IPC: H01L23/495 ,  H01L23/48 ,  H01L23/34 ,  H01L23/28 ,  H01L21/00 ,  H05K7/20 ,  H05K7/18 ,  H01L23/31 ,  H01L23/00

Abstract: A power device for surface mounting has a leadframe including a die-attach support and at least one first lead and one second lead. A die, of semiconductor material, is bonded to the die-attach support, and a package, of insulating material and parallelepipedal shape, surrounds the die and at least in part the die-attach support and has a package height. The first and second leads have outer portions extending outside the package, from two opposite lateral surfaces of the package. The outer portions of the leads have lead heights greater than the package height, extend throughout the height of the package, and have respective portions projecting from the first base.

公开(公告)号：US20230019116A1

公开(公告)日：2023-01-19

申请号：US17935542

申请日：2022-09-26

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Fabio CACCIOTTO

IPC: H02M3/335 ,  H02M1/08

Abstract: A control circuit for a driving an electronic switch associated with a switching node of a flyback converter includes a comparison circuit configured to generate a switch-off signal by comparing a current measurement signal with a current measurement threshold signal. A valley detection circuit is configured to generate a trigger in a trigger signal when a valley signal indicates a valley in a voltage at the switching node of the flyback converter, and a blanking circuit is configured to generate a switch-on signal by combining the trigger signal with a timer signal provide by a timer circuit. The timer signal indicates whether a blanking time-interval has elapsed.

公开(公告)号：US20230018212A1

公开(公告)日：2023-01-19

申请号：US17838159

申请日：2022-06-10

Applicant: STMicroelectronics S.r.l.

Inventor： Giuseppe Papotto ,  Andrea Cavarra ,  Giuseppe Palmisano

IPC: H03K5/00 ,  H03F3/20 ,  G01S13/931

Abstract: In an embodiment a circuit includes frequency multiplier circuitry having input nodes configured to receive an input signal and an anti-phase version thereof, the input signal having a first frequency value, wherein the frequency multiplier circuitry is configured to produce a current signal at a second frequency value that is an even multiple of the first frequency value and a transformer including a primary side and a secondary side, wherein the primary side comprises a primary inductance coupled to the frequency multiplier circuitry to receive the current signal therefrom, wherein the secondary side is configured to provide a frequency multiplied voltage signal, and wherein the frequency multiplier circuitry and the transformer are cascaded between at least one first node and a second node, the at least one first node and the second node couplable to a supply node and ground.

公开(公告)号：US20230017265A1

公开(公告)日：2023-01-19

申请号：US17857633

申请日：2022-07-05

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Ruggero SUSELLA

IPC: H04L9/08

Abstract: One or more keys are derived from a master key by executing a plurality of encryption operations. A first encryption operation uses the master key to encrypt a plaintext input having a plurality of bytes. Multiple intermediate encryption operations are performed using a respective intermediate key generated by a previous encryption operation to encrypt respective plaintext inputs having a number of bytes. At least two bytes of a plaintext input have values based on a respective set of bits of a plurality of sets of bits of an initialization vector, wherein individual bits of the respective set of bits are introduced into respective individual bytes of the plaintext input and the respective set of bits has at least two bits and at most a number of bits equal to the number of bytes of the plaintext input.