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公开(公告)号：US11581754B2
公开(公告)日：2023-02-14
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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公开(公告)号：US11573663B1
公开(公告)日：2023-02-07
申请号：US17648646
申请日：2022-01-21
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Chan Hyuck Yun , Min Sang Kim
Abstract: A method for operating an electronic device includes rotating a first portion of a flexible touchscreen with respect to a second portion of the flexible touchscreen around a folding axis; detecting, self-capacitances sensed in a folding area of the flexible touchscreen using a self-sensing scan, where a first side of the folding area is on the first portion of the flexible touchscreen and a second side of the folding area is on the second portion of the flexible touchscreen, and the first side and the second side are separated by a folding axis; determining, a current strength sensed by the flexible touchscreen in the folding area based on the self-capacitances in the folding area; and determining, a folding angle of the first portion of the flexible touchscreen with the second portion of the flexible touchscreen around the folding axis based on the current strength in the folding area.
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公开(公告)号：US20220353119A1
公开(公告)日：2022-11-03
申请号：US17245890
申请日：2021-04-30
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Ade Putra , Kusuma Adi NINGRAT , Mythreyi Nagarajan
Abstract: A device includes an analog to digital converter configured to convert voltages into a digital signal by sampling the voltages at a fixed sampling time; a first multiplier configured to multiply the digital signal with in-phase coefficients, the in-phase coefficients generated to produce a demodulated in-phase signal at a demodulation signal frequency; a first adder configured accumulate the demodulated in-phase signal to output in-phase magnitude values; a second multiplier configured to multiply the digital signal with quadrature coefficients, the quadrature coefficients generated to produce a demodulated quadrature signal at the demodulation signal frequency; and a second adder configured to accumulate the demodulated quadrature signal to output quadrature magnitude values.
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公开(公告)号：US11486914B2
公开(公告)日：2022-11-01
申请号：US17492210
申请日：2021-10-01
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick Guedon , Baris Volkan Yildirim , Teerasak Lee
Abstract: A circuit includes a tank capacitor coupled between first and second nodes, and a sense resistor having a first terminal coupled to the first node and a second terminal coupled to a regulator input. A switching circuit has first and second inputs coupled to the first and second terminals of the sense resistor. A gain stage has first and second inputs capacitively coupled to first and second outputs of the switching circuit. An analog-to-digital converter receives the output of the gain stage, and receives first and second differential voltages. A reference voltage generator has a temperature independent current source coupled to source current to a reference resistor, the first differential reference voltage being formed across the reference resistor. The reference resistor and sense resistor are located sufficiently close to one another on a single common substrate such that they remain at substantially a same temperature.
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公开(公告)号：US11422663B1
公开(公告)日：2022-08-23
申请号：US17332357
申请日：2021-05-27
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Kien Beng Tan , Eng Jye Ng , Hon Siong Ng , Tong Tee Tan
Abstract: In an example, a method of sensing on a touchscreen including a plurality of touch sensors arranged in rows and columns on the touchscreen is described. The method includes detecting a passive touch on the touchscreen and a positon of an active stylus; determining a plurality of locations across the touchscreen corresponding to the passive touch and a positon of the active stylus, where each of the plurality of locations corresponds to a location of one of the plurality of touch sensors. The method includes transmitting a first uplink signal to a first group of the plurality of locations including a first fraction of the plurality of locations; and transmitting a second uplink signal to a second group of the plurality of locations including a second fraction of the plurality of locations, the first uplink signal being different from the second uplink signal.
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Patent Agency Ranking
公开(公告)号：US20220264082A1
公开(公告)日：2022-08-18
申请号：US17736504
申请日：2022-05-04
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Hong Chean CHOO , Lookah CHUA , Wai Yin HNIN
Abstract: An electronic device includes a pixel array having a plurality of rows with active imaging pixels, and at least one row with test pixels. Each of the test pixels includes a test voltage generation circuit generating a test voltage, a switching circuit receiving the test voltage and an image pixel output signal and passing the test voltage as output when in a test mode, a comparison circuit receiving the output from the switching circuit and an analog to digital conversion signal and asserting a counter reset signal when the output from the switching circuit and the analog to digital conversion signal are equal in voltage, and a counter beginning counting at a beginning of each test cycle within the test mode, stopping counting upon assertion of the counter reset signal, and outputting 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：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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100.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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