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公开(公告)号：US11894810B2
公开(公告)日：2024-02-06
申请号：US17952574
申请日：2022-09-26
Applicant: STMicroelectronics S.r.l.
Inventor： Mattia Fausto Moretti , Paolo Pulici , Alessio Facen
CPC classification number: H03F1/26 , H03F3/45192
Abstract: A circuit arrangement, including: a circuit configured to synthesize a resistor having a resistance value having a variation in time equivalent to a resistance variation of a sensor resistor applied with a resistance bias voltage and a resistance current bias, wherein the circuit includes: an amplifier comprising an input transistor; a bias current generator comprising a control node coupled to an output of the input transistor, wherein the bias current generator is configured to generate a bias current flowing in the input transistor; and a further current generator configured to generate a current at least proportional to the resistance bias current and coupled to the output of the input transistor, wherein the resistance bias voltage is applied to an input of the amplifier, and wherein a transconductance of the input transistor is at least proportional to the resistance of the sensor resistor.
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公开(公告)号：US11894657B2
公开(公告)日：2024-02-06
申请号：US17360381
申请日：2021-06-28
Inventor： Romeo Letor , Vanni Poletto , Antoine Pavlin , Nadia Lecci , Alfio Russo
CPC classification number: H01S5/06216 , H01S5/0261 , H03K5/07
Abstract: An embodiment pulse generator circuit comprises a first electronic switch coupled between first and second nodes, and a second electronic switch coupled between the second node and a reference node. An LC resonant circuit comprising an inductance and a capacitance is coupled between the first and reference nodes along with charge circuitry comprises a further inductance in a current flow line between a supply node and an intermediate node in the LC resonant circuit. Drive circuitry of the electronic switches repeats, during a sequence of switching cycles, charge time intervals, wherein the capacitance in the LC resonant circuit is charged via the charge circuit, and pulse generation time intervals, wherein a pulsed current is provided to the load via the first and second nodes. The charge and pulse generation time intervals are interleaved with oscillation time intervals where the LC resonant circuit oscillates at a resonance frequency.
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公开(公告)号：US20240038263A1
公开(公告)日：2024-02-01
申请号：US18354797
申请日：2023-07-19
Applicant: STMicroelectronics S.r.l.
Inventor： Ezio Galbiati , Michele Boscolo Berto , Giuseppe Maiocchi , Maurizio Ricci
Abstract: An embodiment method includes rectifying a back electromotive force of a spindle motor in a hard disk drive and energizing a voice coil motor in the hard disk drive using the rectified back electromotive force of the spindle motor via a voice coil motor power stage to retract a head of the hard disk drive to a park position. The head is retracted by moving the head towards the park position during a first retract phase and retaining the head in the park position during a second retract phase by applying a bias voltage to the voice coil motor power stage during a bias interval of the second retract phase. The method also includes producing a saturation signal indicative of onset of saturation in the voice coil motor power stage and controlling the bias voltage during the second retract phase.
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公开(公告)号：US11889594B2
公开(公告)日：2024-01-30
申请号：US17654532
申请日：2022-03-11
Applicant: STMicroelectronics (Grenoble 2) SAS , STMicroelectronics S.r.l. , STMicroelectronics Application GMBH
Inventor： Manuel Gaertner , Philippe Sirito-Olivier , Giovanni Luca Torrisi , Thomas Urbitsch , Christophe Roussel , Fritz Burkhardt
IPC: H05B45/14 , H05B45/46 , H05B45/50 , H05B45/325
CPC classification number: H05B45/46 , H05B45/14 , H05B45/325 , H05B45/50
Abstract: A system includes lighting devices coupled to output supply pins, a microcontroller circuit, and a driver circuit, which receives data therefrom, and switches coupled in series to the lighting devices. The driver circuit includes output supply pins and selectively propagates a supply voltage to the output supply pins to provide respective pulse-width modulated supply signals at the output supply pins. The driver circuit computes duty-cycle values of the pulse-width modulated supply signals as a function of the data received from the microcontroller circuit. The lighting devices include at least one subset coupled to the same output supply pin. The microcontroller individually controls the switches via respective control signals to individually adjust a brightness of the lighting devices in the at least one subset of lighting devices.
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公开(公告)号：US11888397B2
公开(公告)日：2024-01-30
申请号：US17531024
申请日：2021-11-19
Applicant: STMicroelectronics S.r.l.
Inventor： Niccolo' Brambilla , Sandro Rossi , Valeria Bottarel
CPC classification number: H02M3/158 , H02M1/0009
Abstract: A DC-DC switching converter includes power switches selectively coupling an output terminal with a first voltage or with a second voltage. A driver stage is coupled with the power switches for driving the power switches. A driver control stage is coupled with the driver stage for controlling the operation of the driver stage. An output current sensing circuit is coupled with the output terminal and with the driver control stage, and is configured to sense a sign of an output current delivered by the DC-DC switching converter at the output terminal and to generate control signals for the driver control stage. The driver control stage controls the operation of the driver stage according to states of the control signals received from the output current sensing circuit, for selectively delaying the activation of the power switches depending on the sensed sign of the output current.
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Patent Agency Ranking
公开(公告)号：US11888304B2
公开(公告)日：2024-01-30
申请号：US16666989
申请日：2019-10-29
Applicant: STMicroelectronics S.r.l.
Inventor： Vittorio D'Angelo , Salvatore Cannavacciuolo , Sergio Lecce , Valerio Bendotti , Orazio Pennisi
CPC classification number: H02H1/063 , H02H9/046 , H02J7/0014
Abstract: An integrated circuit with a hot-plug protection circuit includes input pins and an output pin. The input pins are electrically coupled to a common node in the hot-plug protection circuit via respective electrical connections. The integrated circuit includes clamping circuitry coupled between the common node and the output pin, the clamping circuitry activatable as a result of a voltage spike applied across the clamping circuitry. The plurality of electrical connections and the clamping circuitry provide respective current discharge paths between the input pins in the input pins and the output pin, the respective current discharge paths configured to become conductive as a result of a voltage spike applied to any of the input pins in the plurality of input pins being transferred to the common node via the respective electrical connection in the plurality of electrical connections electrically coupling said any of said input pins to the common node.
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公开(公告)号：US20240021718A1
公开(公告)日：2024-01-18
申请号：US18477372
申请日：2023-09-28
Applicant: STMICROELECTRONICS S.r.l.
Inventor： Ferdinando IUCOLANO , Cristina TRINGALI
IPC: H01L29/778 , H01L21/285 , H01L29/06 , H01L29/47 , H01L29/66
CPC classification number: H01L29/7786 , H01L21/28581 , H01L29/0649 , H01L29/475 , H01L29/66462 , H01L29/7787 , H01L29/2003
Abstract: An HEMT includes a semiconductor body, which includes a semiconductor heterostructure, and a conductive gate region. The gate region includes: a contact region, which is made of a first metal material and contacts the semiconductor body to form a Schottky junction; a barrier region, which is made of a second metal material and is set on the contact region; and a top region, which extends on the barrier region and is made of a third metal material, which has a resistivity lower than the resistivity of the first metal material. The HEMT moreover comprises a dielectric region, which includes at least one front dielectric subregion, which extends over the contact region, delimiting a front opening that gives out onto the contact region; and wherein the barrier region extends into the front opening and over at least part of the front dielectric subregion.
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公开(公告)号：US20240019688A1
公开(公告)日：2024-01-18
申请号：US18220554
申请日：2023-07-11
Applicant: STMicroelectronics S.r.l.
Inventor： Massimiliano MERLI , Roberto CARMINATI , Nicolo' BONI , Sonia COSTANTINI , Carlo Luigi PRELINI
CPC classification number: G02B26/0858 , B81B3/007 , B81C1/00658 , B81B2201/042
Abstract: Disclosed herein is a micro-electro-mechanical mirror device having a fixed structure defining an external frame delimiting a cavity, a tiltable structure extending into the cavity, a reflecting surface carried by the tiltable structure and having a main extension in a horizontal plane, and an actuation structure coupled between the tiltable structure and the fixed structure. The actuation structure is formed by a first pair of actuation arms causing rotation of the tiltable structure around a first axis parallel to the horizontal plane. The actuation arms are elastically coupled to the tiltable structure through elastic coupling elements and are each formed by a bearing structure and a piezoelectric structure. The bearing structure of each actuation arm is formed by a soft region of a first material and the elastic coupling elements are formed by a bearing layer of a second material, the second material having greater stiffness than the first material.
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公开(公告)号：US20240019475A1
公开(公告)日：2024-01-18
申请号：US18348993
申请日：2023-07-07
Applicant: STMICROELECTRONICS S.r.l.
Inventor： Matteo QUARTIROLI
Abstract: The integrated sensor has a clock which provides a clock signal having a clock frequency; a digital detector which detects a power grid signal and generates a reference digital signal indicative of the power grid signal and having a sample rate which is a function of the clock frequency; and a timing monitoring stage which receives the reference digital signal and a nominal signal indicative of a nominal timing of the reference digital signal. The timing monitoring stage also compares the reference digital signal with the nominal signal and, in response, provides an error signal indicative of a timing error between the reference digital signal and the nominal signal.
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公开(公告)号：US20240014718A1
公开(公告)日：2024-01-11
申请号：US18345863
申请日：2023-06-30
Applicant: STMICROELECTRONICS S.r.l.
Inventor： Luca SEGHIZZI , Federico VERCESI , Gianluca LONGONI
CPC classification number: H02K15/026 , H02K15/0068 , H02K2215/00
Abstract: A stator for an electric actuator or motor, including: a solid body; a ferromagnetic core region between the layers of semiconductor material, electrically insulated from the layers of semiconductor material; a plurality of conductive through vias through the solid body; a first plurality of conductive strips, which extend parallel to one another above the core; and a second plurality of conductive strips, which extend parallel to one another above the core and opposite to the first plurality of conductive strips; wherein the first plurality of conductive strips, the plurality of conductive through vias, and the second plurality of conductive strips form a winding or coil of the stator.
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