公开(公告)号：US20130313993A1

公开(公告)日：2013-11-28

申请号：US13888843

申请日：2013-05-07

Applicant: STMICROELECTRONICS (SHENZHEN) R&D CO. LTD.

Inventor： Meng Wang ,  Tao Tao Huang

IPC: H03K5/12

CPC classification number: H03K5/12

Abstract: A drive circuit includes a first transistor coupled in series with a second transistor at a first intermediate node coupled to a load. An amplifier has an output driving a control terminal of the second transistor. The amplifier includes a first input coupled to a second intermediate node and a second input coupled to a reference voltage. A feedback circuit is coupled between the first intermediate node and the second intermediate node. A slope control circuit is coupled the second intermediate node. The slope control circuit injects a selected value of current into the second intermediate node, that current operating to control the output of the amplifier in setting a slope for change in voltage at the first intermediate node.

Abstract translation: 驱动电路包括与耦合到负载的第一中间节点与第二晶体管串联耦合的第一晶体管。 放大器具有驱动第二晶体管的控制端的输出。 放大器包括耦合到第二中间节点的第一输入和耦合到参考电压的第二输入。 反馈电路耦合在第一中间节点和第二中间节点之间。 斜坡控制电路耦合第二中间节点。 斜坡控制电路将选择的电流值注入到第二中间节点中，该电流在设定第一中间节点处电压变化的斜率时控制放大器的输出。

公开(公告)号：US20130169318A1

公开(公告)日：2013-07-04

申请号：US13708812

申请日：2012-12-07

Applicant: Stmicroelectronics (Shenzhen) R&D Co. Ltd.

Inventor： Lin LI

IPC: H03K19/003

CPC classification number: H03K19/00361 ,  G01R31/2621

Abstract: A high side driver circuit includes a driver stage having an input, an output, a first power terminal and a second power terminal, a transistor having a first power terminal, a second power terminal, and a control terminal coupled to the output of the driver stage, and a switch coupled between the second power terminal of the driver stage and the second power terminal of the transistor.

Abstract translation: 高侧驱动器电路包括具有输入端，输出端，第一电源端子和第二电源端子的驱动级，具有第一电源端子，第二电源端子和耦合到驱动器的输出端的控制端子的晶体管 并且耦合在驱动器级的第二电源端子和晶体管的第二电源端子之间的开关。

公开(公告)号：US20130169188A1

公开(公告)日：2013-07-04

申请号：US13648412

申请日：2012-10-10

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.

Inventor： Yijun Duan

IPC: G01R19/12 ,  H05B37/02

CPC classification number: G01R19/12 ,  G01R19/16557 ,  H05B33/0845 ,  H05B33/0887

Abstract: A bidirectional voltage differentiator circuit comprises start-up circuitry, sensing circuitry, and output circuitry coupled to logic circuitry. The start-up circuitry acts to start-up the sensing circuitry when the circuit is powered on, and accelerates the response of the sensing circuitry thereafter. The sensing circuitry senses variation in an input voltage applied to an input node. Responsive to the voltage variation sensed by the sensing circuitry, the output circuitry produces a state change at a first or second output node. The logic circuitry receives the states of the output nodes and produces a logic output signal to indicate the occurrence of the variation sensed in the input voltage. The voltage sensing circuit is operable to sense variation of the input voltage regardless of whether the voltage is rising or falling and without regard to the DC value of the input voltage.

Abstract translation: 双向电压微分电路包括启动电路，感测电路和耦合到逻辑电路的输出电路。 启动电路用于在电路通电时启动感测电路，此后加速感测电路的响应。 感测电路感测施加到输入节点的输入电压的变化。 响应于由感测电路感测的电压变化，输出电路在第一或第二输出节点处产生状态改变。 逻辑电路接收输出节点的状态并产生逻辑输出信号以指示在输入电压中检测到的变化的发生。 电压感测电路可操作以感测输入电压的变化，而不管电压是上升还是下降，而不考虑输入电压的DC值。

公开(公告)号：US12231102B2

公开(公告)日：2025-02-18

申请号：US18493282

申请日：2023-10-24

Applicant: STMicroelectronics (Shenzhen) R&D Co., Ltd.

Inventor： XiangSheng Li ,  Ru Feng Du

IPC: H03G3/30 ,  H03F3/187 ,  H04R3/00 ,  H04R29/00

Abstract: An audio amplifier includes: a buck controller configured to control an output voltage at a first supply terminal, the output voltage selected from a set including a plurality of output voltages, where the output voltage takes a settling time to settle; a first audio bridge including: a class-AB driver stage coupled to the first supply terminal, and a delay insertion circuit configured to receive a processed digital stream and provide the processed digital stream to the class-AB driver stage a delay time after receiving the processed digital stream, where the delay time is based on the settling time; and an audio amplitude detector configured to detect a first peak amplitude in the first digital audio stream, where the buck controller is configured to select a lowest output voltage from the set that is higher than the first peak amplitude plus a headroom voltage.

公开(公告)号：US11842009B2

公开(公告)日：2023-12-12

申请号：US17677119

申请日：2022-02-22

Applicant: STMicroelectronics (BEIJING) R&D Co., LTD ,  STMicroelectronics (Shenzhen) R&D Co., Ltd.

Inventor： Bowei Chen ,  Yue Ding ,  Guodong Sun

IPC: G06F3/041 ,  G06F3/044 ,  H03M1/20 ,  H04L65/00 ,  H04N21/462

CPC classification number: G06F3/0418 ,  G06F3/0412 ,  G06F3/0446 ,  G06F3/0447 ,  H03M1/20 ,  H04L65/00 ,  H04N21/4621

Abstract: A method for operating an electronic device includes detecting, by a touchscreen controller, a touch point on a touchscreen; determining, by the touchscreen controller, coordinates of the touch point; scaling, by the touchscreen controller, up the coordinates of the touch point to obtain scaled up coordinates by overwriting a reserved portion of a touch event protocol with additional information corresponding to the coordinates of the touch point; reporting, by the touchscreen controller, the scaled up coordinates of the touch point to an application processor; and determining, by the application processor, the coordinates of the touch point with an increased resolution by converting the scaled up coordinates into a floating point value.

公开(公告)号：US20230378923A1

公开(公告)日：2023-11-23

申请号：US17747845

申请日：2022-05-18

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics (Shenzhen) R&D Co. Ltd.

Inventor： Jian Wen ,  Davide Luigi Brambilla ,  Qiyu Liu ,  Mei Yang ,  Shuming Tong ,  Francesco Stilgenbauer

IPC: H03G3/30 ,  H03G3/34 ,  H03K4/06

CPC classification number: H03G3/3026 ,  H03G3/348 ,  H03G3/3036 ,  H03K4/06

Abstract: In an embodiment, an amplifier circuit includes a second stage that includes a first switch circuit including first and second terminals, a plurality of resistive elements coupled between the first and second terminals of the first switch circuit, and a plurality of switches configured to control an equivalent resistance between the first and second terminals of the first switch circuit. During play mode, the second stage has a gain between the input of the second stage and the output of the second stage of a first value. During a transition from mute mode to play mode, the amplifier circuit is configured to progressively increase the gain of the second stage from a second value to the first value. During a transition from play mode to mute mode, the amplifier circuit is configured to progressively decrease the gain of the second stage from the first value to the second value.

公开(公告)号：US11757345B2

公开(公告)日：2023-09-12

申请号：US17646934

申请日：2022-01-04

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.

Inventor： Dino Costanzo ,  Xiyu Xu ,  Chengpan Cai

IPC: H02M7/44 ,  H02M1/00 ,  H02M7/493 ,  H02P5/505 ,  H02P5/685

CPC classification number: H02M1/0009 ,  H02M7/493 ,  H02P5/505 ,  H02P5/685

Abstract: An apparatus includes a first inverter configured to drive a first motor having a plurality of phases, the first inverter comprising a plurality of inverter legs, each of which is coupled to a corresponding phase of the first motor, a second inverter configured to drive a second motor having a plurality of phases, the second inverter comprising a plurality of inverter legs, each of which is coupled to a corresponding phase of the second motor, and a first current sensor configured to sense currents flowing in the first inverter and the second inverter, wherein the first current sensor is shared by at least by two inverter legs.

公开(公告)号：US11750163B2

公开(公告)日：2023-09-05

申请号：US17200490

申请日：2021-03-12

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.

Inventor： Ru Feng Du ,  Qi Yu Liu

IPC: H03F3/217 ,  H03G1/04 ,  H03K19/017 ,  H03K19/20 ,  H03K19/003 ,  H03G3/30 ,  H03K19/096

CPC classification number: H03G1/04 ,  H03F3/2173 ,  H03G3/3026 ,  H03K19/00323 ,  H03K19/01728 ,  H03K19/096 ,  H03K19/20 ,  H03F2200/78

Abstract: In an embodiment, a class-D amplifier includes an input terminal configured to receive an input signal; a comparator having an input coupled to the input terminal; a deglitching circuit having an input coupled to an output of the comparator; and a driving circuit having an input coupled to an output of the deglitching circuit. The deglitching circuit includes a logic circuit coupled between the input of the deglitching circuit and the output of the deglitching circuit. The logic circuit is configured to receive a clock signal having the same frequency as the switching frequency of the class-D amplifier.

公开(公告)号：US20230019962A1

公开(公告)日：2023-01-19

申请号：US17374815

申请日：2021-07-13

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics (Shenzhen) R&D Co. Ltd.

Inventor： Mirko Guarnera ,  Wenbin Yang ,  Enrico Rosario Alessi ,  Fabio Passaniti

IPC: G06F3/01 ,  H04M1/02

Abstract: A system and method for determining handedness in a device. The system including a first electrode, a second electrode, a sensor, and a processing circuit coupled to each other. The first electrode is placed at a first location, and the second electrode is placed at a second location on the device—the first location is different from the second location. The electrodes are configured to sense a variation in an electrostatic field in response to a user interacting with the device. The sensor detects a differential potential between the first electrode and the second electrode, and the processing circuit determines whether the user is interacting with the device using a left hand or a right hand. The determining is based on data received from the sensor corresponding to the differential potential.

公开(公告)号：US11496185B2

公开(公告)日：2022-11-08

申请号：US17024270

申请日：2020-09-17

Applicant: STMicroelectronics Asia Pacific Pte Ltd. ,  STMicroelectronics (Shenzhen) R&D Co. Ltd.

Inventor： Wenhe Zhao ,  Jiasheng Wang

IPC: H02J50/80 ,  H04B5/00 ,  H02J50/12

Abstract: A method for modulating a signal including operating a circuit in a first arrangement during a first operating interval and switching the circuit between the first arrangement and a second arrangement during a first modulation interval to vary a load on the circuit to produce a first amplitude shift keying (ASK) signal. The method further includes detecting a voltage on the circuit crossing a threshold level and operating the circuit in the second arrangement during a second operating interval. The method also includes switching the circuit between the second arrangement and the first arrangement during a second modulation interval to vary the load on the circuit to produce a second ASK signal.