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公开(公告)号：US11368052B2
公开(公告)日：2022-06-21
申请号：US16930651
申请日：2020-07-16
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick Guedon
Abstract: Disclosed herein is a bridge rectifier and associated control circuitry collectively forming a “regtifier”, capable of both rectifying an input time varying voltage as well as regulating the rectified output voltage produced. To accomplish this, the gate voltages of transistors of the bridge rectifier that are on during a given phase may be modulated via analog control (to increase the on-resistance of those transistors) or via pulse width modulation (to turn off those transistors prior to the end of the phase). Alternatively or additionally, the transistors of the bridge rectifier that would otherwise be off during a given phase may be turned on to help dissipate excess power and thereby regulate the output voltage. A traditional voltage regulator, such as a low-dropout amplifier, is not used in this design.
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公开(公告)号：US11356654B2
公开(公告)日：2022-06-07
申请号：US16514695
申请日：2019-07-17
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Hong Chean Choo , Lookah Chua , Wai Yin Hnin
Abstract: An electronic device includes a test voltage generation circuit to generate a test voltage as a function of a regulator voltage, and a switching circuit to receive the test voltage and an image pixel output signal, and to pass the test voltage as output when in a test mode. A comparison circuit receives the output from the switching circuit and an analog to digital conversion signal, and asserts a counter reset signal when the output from the switching circuit and the analog to digital conversion signal are equal in voltage. A counter begins counting at a beginning of each test cycle within the test mode, stops counting upon assertion of the counter rest signal, and outputs its count upon stopping counting. The count is proportional to the test voltage when in the test mode.
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公开(公告)号：US20220173617A1
公开(公告)日：2022-06-02
申请号：US17107161
申请日：2020-11-30
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Wenhe Zhao , Robin Tanzania
IPC: H02J50/12 , H02M7/5387 , H02J7/02 , H02M7/217
Abstract: A method for operating a wireless charging transmitter includes switching, by the wireless charging transmitter, an operating mode of a full bridge inverter of the wireless charging transmitter from a first mode to a second mode; and changing, by the wireless charging transmitter, an operating point of the wireless charging transmitter from a first operating point associated with the first mode to a second operating point associated with the second mode, the second operating point being selected to dampen a change in a rectifier voltage of a wireless charging receiver inductively coupled to the wireless charging transmitter.
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104.发明授权公开(公告)号：US11251691B2
公开(公告)日：2022-02-15
申请号：US17011439
申请日：2020-09-03
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Supriya Raveendra Hegde , Yannick Guedon
IPC: H02M7/217 , H03K19/017 , H02M1/08 , H02M1/32
Abstract: A high-side switching transistor of a rectifier circuit is driven by a high-side driver circuit to supply current to an output node. The high-side driver circuit is powered between a capacitive bootstrap node and the output node. A boot charge circuit charges the bootstrap capacitor by supplying current to the bootstrap node. The boot charge circuit includes: a first current path that selectively supplies a first charging current to the bootstrap node when the rectifier circuit is operating in a switching mode; and a second current path that selectively supplies a second charging current to the bootstrap node when the rectifier circuit is operating in a reset mode.
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公开(公告)号：US20210391752A1
公开(公告)日：2021-12-16
申请号：US17403060
申请日：2021-08-16
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick GUEDON
Abstract: A method of wirelessly transmitting power includes: causing a power transmission circuit to transmit, to a master power reception circuit, a portion of power it is capable of transmitting; adjusting operation of a slave power reception unit until a first rectified voltage produced by the master power reception circuit and a second rectified voltage produced by the slave power reception unit are equal; causing the power transmission circuit to transmit additional power to the slave power reception unit, resulting in the first and second rectified voltages being unequal; and adjusting operation of the slave power reception unit until the first and second rectified voltages are again equal. A dummy load is connected to the slave power reception unit prior to causing the power transmission circuit to transmit the additional power, and is disconnected once the first and second rectified voltages are equal.
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Patent Agency Ranking
106.发明申请公开(公告)号：US20210382576A1
公开(公告)日：2021-12-09
申请号：US17230317
申请日：2021-04-14
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kusuma Adi NINGRAT , Cam Chung LA
IPC: G06F3/044 , G06F3/041 , G06F3/0488
Abstract: A touch-screen-controller (TSC) performs mutual sensing to acquire touch strength values from a touch matrix formed by capacitively intersecting conductive lines. For each line, the TSC generates an emulated self capacitance value from an associated touch strength value based upon a position of that line compared to a location on the touch matrix adjacent to which a first touch type is expected to occur, and determines presence of the first touch type adjacent to the touch matrix based upon the emulated values. The emulated values for each conductive line may be weighted based upon its closeness to the location where the first touch type is expected to occur. The weighting may be zero if its associated conductive line is outside of the location where the first touch type is expected to occur, and may be one if inside of the location where the first touch type is expected to occur.
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公开(公告)号：US11196301B1
公开(公告)日：2021-12-07
申请号：US17124174
申请日：2020-12-16
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Teerasak Lee
Abstract: A bridge rectifier is formed by a first transistor coupled between a regulator output and a first tap, a second transistor coupled between the regulator output and a second tap, a third transistor coupled between the first tap and ground, and a fourth transistor coupled between the second tap and ground. A first comparator circuit, when enabled, compares ground to a voltage at the first tap and asserts a first low-side control signal to turn on the third transistor when the voltage at the first tap is below ground, and, when reset, samples an offset of the first comparator circuit. A second comparator circuit, when enabled, compares ground to a voltage at second first tap and asserts a second low-side control signal to turn on the fourth transistor when the voltage at the second tap is below ground, and, when reset, samples an offset of the second comparator circuit.
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公开(公告)号：US11175319B1
公开(公告)日：2021-11-16
申请号：US17025210
申请日：2020-09-18
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick Guedon , Baris Volkan Yildirim , Teerasak Lee
Abstract: A wireless-power-transmission-system includes a bridge with a tank-capacitor coupled thereto, a sense-resistor coupled between the bridge and an input of a regulator, a switching-circuit having first and second inputs coupled across the sense-resistor, and a gain-stage having first and second inputs capacitively coupled to first and second outputs of the switching-circuit. An ADC digitizes output of the gain-stage by comparing the output to a reference voltage, and a temperature-independent current source is coupled to a reference-resistor to generate the reference voltage. In a reset-phase, the switching-circuit shorts the inputs of the gain-stage to one another, and the gain-stage shorts its inputs to its output. The switching-circuit, in a first-chopping-phase, couples the sense-resistor between the first and second inputs of the gain-stage, and in a second-chopping-phase, couples the sense-resistor in reverse between the second and first inputs of the gain-stage. The resistance of the reference-resistor tracks the sense-resistor across temperature.
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109.发明授权公开(公告)号：US11144149B2
公开(公告)日：2021-10-12
申请号：US16902938
申请日：2020-06-16
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Cam Chung La , Kien Beng Tan
Abstract: A determination is made as to whether touch pressure data acquired from each of a plurality of touch pressure sensors is indicative of abnormal operation. If abnormal operation is indicated, the touch pressure data from each of the plurality of touch pressure sensors, except those touch pressure sensors having touch pressure data indicative of abnormal operation, is summed. Then, the sum is multiplied by a correction factor to produce a touch pressure output indicative of physical force applied to the plurality of touch pressure sensors.
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公开(公告)号：US11093097B2
公开(公告)日：2021-08-17
申请号：US16984344
申请日：2020-08-04
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Youngjin Wang , Tae-gil Kang
Abstract: A data frame in a touch capacitive sensing circuit includes both mutual capacitance data and self capacitance data. The mutual capacitance data and self capacitance data of the frame are filtered to define mutual capacitance and self capacitance islands. Centroids of the mutual capacitance and self capacitance islands are calculated and then processed in a weighted mixing operation to produce a hybrid centroid that more accurately locates the coordinates of a detected touch/hover.
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