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公开(公告)号：US11353373B2
公开(公告)日：2022-06-07
申请号：US16887352
申请日：2020-05-29
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Min Sang Kim , Chan Hyuck Yun , Sa Hyang Hong , Ju Hyun Son
Abstract: A strain gauge includes first and second substrates spaced apart from one another. A first flexible printed circuit board portion is in contact with a top side of the first and second substrates, and has a first Wheatstone bridge formed therein. The first flexible printed circuit board portion positions the first Wheatstone bridge such that two resistors of the first Wheatstone bridge are positioned to span from the top side of the first substrate to the top side of the second substrate. A second flexible printed circuit board portion is in contact with a bottom side of the first and second substrates, and has a second Wheatstone bridge formed therein. The second flexible printed circuit board positions the second Wheatstone bridge such that two resistors of the second Wheatstone bridge are positioned to span from the bottom side of the first substrate to the bottom side of the second substrate.
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公开(公告)号：US11271393B1
公开(公告)日：2022-03-08
申请号：US17007633
申请日：2020-08-31
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Supriya Raveendra Hegde , Yannick Guedon , Huiqiao He
Abstract: A wireless-power-system includes a bridge-rectifier having first and second inputs coupled to first and second terminals of a coil, and an output coupled to a rectified voltage node. An excitation circuit is coupled to the first input. A protection circuit has a first connection node capacitively coupled to the first terminal. The protection circuit, in Q-factor measurement mode, clamps the first connection node when the first input is coupled to ground, and connects the first connection node to the rectified voltage node when the first input is coupled to a supply voltage. The protection circuit, in wireless power mode, is acting as one leg of the rectifier. A pass gate circuit is coupled between the first connection node and a sense node, and a sensing circuit is coupled to the sense node and measures a Q-factor of the wireless power system when the protection circuit is in Q-factor measurement mode.
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公开(公告)号：US20220069570A1
公开(公告)日：2022-03-03
申请号：US17007633
申请日：2020-08-31
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Supriya Raveendra HEGDE , Yannick GUEDON , Huiqiao HE
Abstract: A wireless-power-system includes a bridge-rectifier having first and second inputs coupled to first and second terminals of a coil, and an output coupled to a rectified voltage node. An excitation circuit is coupled to the first input. A protection circuit has a first connection node capacitively coupled to the first terminal. The protection circuit, in Q-factor measurement mode, clamps the first connection node when the first input is coupled to ground, and connects the first connection node to the rectified voltage node when the first input is coupled to a supply voltage. The protection circuit, in wireless power mode, is acting as one leg of the rectifier. A pass gate circuit is coupled between the first connection node and a sense node, and a sensing circuit is coupled to the sense node and measures a Q-factor of the wireless power system when the protection circuit is in Q-factor measurement mode.
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公开(公告)号：US20220030667A1
公开(公告)日：2022-01-27
申请号：US17472247
申请日：2021-09-10
Inventor： Fuchao WANG , Olivier LENEEL , Ravi SHANKAR
Abstract: An integrated circuit is provided having an active circuit. A heating element is adjacent to the active circuit and configured to heat the active circuit. A temperature sensor is also adjacent to the active circuit and configured to measure a temperature of the active circuit. A temperature controller is coupled to the active circuit and configured to receive a temperature signal from the temperature sensor. The temperature controller operates the heating element to heat the active circuit to maintain the temperature of the active circuit in a selected temperature range.
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公开(公告)号：US20220021373A1
公开(公告)日：2022-01-20
申请号：US17371368
申请日：2021-07-09
Inventor： Marco Sautto , Giona Fucili , Valerio Lo Muzzo , Kaufik Linggajaya
IPC: H03H11/04 , H01L41/113
Abstract: In accordance with an embodiment, a method of operating a piezoelectric transducer configured to transduce mechanical vibrations into transduced electrical signals at a pair of sensor electrodes includes stimulating a resonant oscillation of the piezoelectric transducer by applying at least one pulse electrical stimulation signal to the pair of sensor electrodes; detecting, at the pair of sensor electrodes, at least one electrical signal resulting from the stimulated resonant oscillation, wherein the at least one electrical signal resulting from the stimulated resonant oscillation oscillates at a resonance frequency of the piezoelectric transducer; measuring a frequency of oscillation of the at least one electrical signal resulting from the stimulated resonant oscillation to obtain a measured resonance frequency of the piezoelectric transducer; and tuning a stopband frequency of a notch filter coupled to the piezoelectric transducer to match the measured resonance frequency of the piezoelectric transducer.
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Patent Agency Ranking
公开(公告)号：US20220021241A1
公开(公告)日：2022-01-20
申请号：US16930651
申请日：2020-07-16
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick GUEDON
IPC: H02J50/12
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：US11165286B1
公开(公告)日：2021-11-02
申请号：US16899990
申请日：2020-06-12
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Teerasak Lee , Chee Weng Cheong , Yannick Guedon , Eng Jye Ng
Abstract: A data demodulating circuit includes a sensing circuit sensing a power signal applied to a coil at first and second times, and outputting an analog value representing a difference in voltage of the power signal at the first and second times. An analog-to-digital converter digitizes the analog value output by the analog voltage differential sensing circuit to produce a digital code. A compensation circuit, over a period of time, compares a present value of the digital code to a first value of the digital code during the period, and subtracts a given value from the present value of the digital code if the present value is greater than the first value but add the given value to the present value of the digital code if the present value is less than the first value. An accumulator accumulates output of the compensation circuit, and a filter filters output of the accumulator.
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公开(公告)号：US11152822B1
公开(公告)日：2021-10-19
申请号：US17037982
申请日：2020-09-30
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Baranidharan Karuppusamy , Thet Mon Sann , Kien Beng Tan , Supriya Raveendra Hegde , Huiqiao He , Teerasak Lee
Abstract: A wireless-power-circuit is operable in transceiver-mode and Q-factor-measurement-mode, and includes a bridge coupled to a coil, and having an output coupled to a rectified-voltage node. An excitation circuit, when in Q-factor-measurement-mode, drives the coil with a pulsed signal. A protection circuit couples the coil to a first node when in Q-factor-measurement-mode and decouples the coil from the first node when in transceiver-mode. A Q-factor sensing circuit includes an amplifier having inputs coupled to the first node and a common mode voltage (Vcm), and generating an output signal having an output voltage. A comparator generates a comparison output indicating Vcm crossing of a voltage at the first terminal of the coil, a processing circuit generating an enable signal based upon the comparison output, and an analog-to-digital-converter, when enabled, digitizing the output voltage for use in calculating a Q-factor of the coil.
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公开(公告)号：US11128170B1
公开(公告)日：2021-09-21
申请号：US16897429
申请日：2020-06-10
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick Guedon
Abstract: A power transmission system includes at least one wireless power transmission circuit. A first wireless power reception circuit includes a first circuit comparing a reference voltage to a feedback voltage representing an output voltage produced from received power and delivered to an output node, and adjusting a first control terminal of a device supplying a first rectified voltage until the feedback and reference voltages are equal. A second wireless power reception circuit includes a second circuit modifying a control terminal of a device sourcing a second rectified current produced from received power to the output node, based upon comparison of a reference current to a current representative of the second rectified current. Control circuitry adjusts the reference current until a first rectified voltage generated by the first wireless power reception circuit and a second rectified voltage generated by the second wireless power reception circuit are equal.
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公开(公告)号：US10996792B2
公开(公告)日：2021-05-04
申请号：US16130332
申请日：2018-09-13
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Abe Yun , Aiden Jeon , Glen Kang
Abstract: Disclosed herein is a method of operating a touch screen controller in a device with a touch screen having force lines and sense lines. The method includes receiving touch data from the touch screen, and operating the touch screen in a self capacitance sensing mode. In the self capacitance sensing mode, which force lines have strength values indicating a potential touch to the touch screen are determined. The method also includes operating the touch screen in a mutual capacitance sensing mode, and in the mutual capacitance sensing mode, performing mutual capacitance sensing on only a subset of the force lines, with the subset of the force lines including at least those force lines indicating the potential touch to the touch screen.
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