Patents Assigned to STMicroelectronics Asia Pacific Pte. Ltd.
  • Patent number: 11408923
    Abstract: A receiver circuit includes a rectifier operable in full-, half-synchronous and asynchronous modes. A measurement circuit, with method, provides for real-time power measurement within the rectifier. The measurements are made based on the average output current from the rectifier delivered to the load and measurements sampled over time of the instantaneous voltage at each input/output node of the rectifier. Equivalent resistance in the rectifier is determined from the measurements and power dissipation calculated from the determined equivalent resistance and the average output current. The instantaneous voltages are synchronously captured through high-voltage AC coupling in order to detect the voltage drop across each element of the rectifier. The sensed voltages are amplified in the low voltage domain and converted by a high-speed analog-to-digital converter in order to produce data useful in computing equivalent resistance values.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: August 9, 2022
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Yannick Guedon, Teerasak Lee, Supriya Raveendra Hegde
  • Patent number: 11387676
    Abstract: A system comprising includes a wireless power receiver generating a rectified voltage. A low dropout regulator (LDO) generates a first regulated output voltage from the rectified voltage, during a first phase. A first switch couples the first regulated output voltage to a voltage output node during the first phase. During a second phase, the LDO generates a second regulated output voltage from the rectified voltage. A switching regulator generates a third regulated output voltage during the second phase. A second switch couples the third regulated output voltage to the voltage output node during the second phase. During a third phase, the LDO is disabled, while the switching regulator continues to generate the third regulated output voltage. The first switch opens during the third phase while the second switch remains closed.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: July 12, 2022
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Eng Jye Ng, Chee Weng Cheong, Huiqiao He
  • Patent number: 11368052
    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.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: June 21, 2022
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventor: Yannick Guedon
  • Patent number: 11356654
    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.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: June 7, 2022
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Hong Chean Choo, Lookah Chua, Wai Yin Hnin
  • Patent number: 11353373
    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.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: June 7, 2022
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Min Sang Kim, Chan Hyuck Yun, Sa Hyang Hong, Ju Hyun Son
  • Publication number: 20220140744
    Abstract: A bridge rectifier and associated control circuitry collectively form a “regtifier” which rectifies an input time varying voltage and regulates the rectified output voltage produced without the use of a traditional voltage regulator. 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). 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. This modulation is based upon both a voltage feedback signal and a current feedback signal.
    Type: Application
    Filed: January 14, 2022
    Publication date: May 5, 2022
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventor: Yannick GUEDON
  • Publication number: 20220140176
    Abstract: A method of making a light sensor module includes connecting a light sensing circuit to an interconnect on a substrate, and forming a cap. The cap is formed by producing a cap substrate from material opaque to light to have an opening formed therein, placing the cap substrate top-face down, dispensing a light transmissible material into the opening, compressing the light transmissible material using a hot tool to thereby cause the light transmissible material to fully flow into the opening to form at a light transmissible aperture, and placing the cap substrate into a curing environment. A bonding material is dispensed onto the substrate. The cap is picked up and placed onto the substrate positioned such that the light transmissible aperture is aligned with the light sensing circuit, with the bonding material bonding the cap to the substrate to thereby form the light sensor module.
    Type: Application
    Filed: October 29, 2020
    Publication date: May 5, 2022
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Jaspreet Singh SIDHU, Tat Ming TEO
  • Publication number: 20220140657
    Abstract: A bridge rectifier is controlled by control circuitry to act a “regtifier” which both regulates and rectifies without the use of a traditional voltage regulator. To accomplish this, the gate voltages of transistors of the bridge that are on during a given phase may be modulated to dissipate excess power. Gate voltages of transistors of the bridge that are off during the given phase may alternatively or additionally be modulated to dissipate excess power. The regtifier may act as two half-bridges that each power a different voltage converter, with those voltage converters powering a battery. The voltage converters may be switched capacitor voltage converters that switch synchronously with switching of the two half-bridges as they perform rectification.
    Type: Application
    Filed: January 14, 2022
    Publication date: May 5, 2022
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventor: Yannick GUEDON
  • Patent number: 11301097
    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.
    Type: Grant
    Filed: April 14, 2021
    Date of Patent: April 12, 2022
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Kusuma Adi Ningrat, Cam Chung La
  • Patent number: 11294504
    Abstract: A touch screen controller includes an input stage configured to receive and condition a touch output from a touch matrix to produce a touch signal. An accumulation stage is configured to receive the touch signal and accumulate the touch signal to produce an accumulated output. The accumulated output is digitized by an analog to digital converter to produce a touch strength value. A given amount of charge is subtracted from or added to accumulated output during a next accumulation if the touch strength value is greater than an upper threshold or less than a lower threshold. This avoids saturation of components in the touch screen controller and therefore increases the signal to noise ratio.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: April 5, 2022
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Yannick Guedon, Leonard Liviu Dinu, Hugo Gicquel
  • Publication number: 20220103019
    Abstract: A wireless power circuit operable in transceiver mode and in Q-factor measurement mode 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 node. An excitation circuit coupled to the first terminal, in Q-factor measurement mode, drives the coil with a pulsed signal. A protection circuit couples the first terminal to a first node when in Q-factor measurement mode and decouples the first terminal when in transceiver mode. A controller causes the bridge rectifier to short the first and second terminals to ground during Q-factor measurement mode. A sensing circuit amplifies voltage at the first node to produce an output voltage, and in response to the voltage at the first node rising to cross a rising threshold voltage, digitizes the output voltage. The digitized output voltage is used in calculating a Q-factor of the coil.
    Type: Application
    Filed: August 23, 2021
    Publication date: March 31, 2022
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Baranidharan KARUPPUSAMY, Thet Mon SANN, Kien Beng TAN, Supriya Raveendra HEGDE, Huiqiao HE, Teerasak LEE
  • Publication number: 20220091164
    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.
    Type: Application
    Filed: October 1, 2021
    Publication date: March 24, 2022
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Yannick GUEDON, Baris Volkan YILDIRIM, Teerasak LEE
  • Patent number: 11271393
    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.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: March 8, 2022
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Supriya Raveendra Hegde, Yannick Guedon, Huiqiao He
  • Publication number: 20220069570
    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.
    Type: Application
    Filed: August 31, 2020
    Publication date: March 3, 2022
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Supriya Raveendra HEGDE, Yannick GUEDON, Huiqiao HE
  • Patent number: 11255875
    Abstract: A sensor includes a MEMS element responsive to acceleration, an analog-to-digital converter coupled to an output of the MEMS element, and a free fall detector coupled to an output of the analog-to-digital converter. The free fall detector is configured to determine whether the sensor is in free fall based on acceleration information received from the analog-to-digital converter. A digital interface is coupled to the analog-to-digital converter and to an output of the free fall detector and is configured to issue an output related to free fall information determined by the free fall detector.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: February 22, 2022
    Assignee: STMICROELECTRONICS ASIA PACIFIC PTE LTD.
    Inventor: Heejun Kwak
  • Patent number: 11251691
    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.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: February 15, 2022
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Supriya Raveendra Hegde, Yannick Guedon
  • Patent number: 11243636
    Abstract: A method for operating an electronic device includes: having a touch sensitive display configured to be rolled into or unrolled out of a first retainment structure along a first direction. The first retainment structure includes a conductive material disposed within the first retainment structure.
    Type: Grant
    Filed: November 30, 2020
    Date of Patent: February 8, 2022
    Assignee: STMICROELECTRONICS ASIA PACIFIC PTE LTD.
    Inventors: Ju Hyun Son, Min Sang Kim, Yun Sang On, Sa Hyang Hong, Yong Hun Lee
  • Publication number: 20220030667
    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.
    Type: Application
    Filed: September 10, 2021
    Publication date: January 27, 2022
    Applicants: STMICROELECTRONICS ASIA PACIFIC PTE LTD, STMICROELECTRONICS, INC.
    Inventors: Fuchao WANG, Olivier LENEEL, Ravi SHANKAR
  • Publication number: 20220021241
    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.
    Type: Application
    Filed: July 16, 2020
    Publication date: January 20, 2022
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventor: Yannick GUEDON
  • Publication number: 20210391752
    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.
    Type: Application
    Filed: August 16, 2021
    Publication date: December 16, 2021
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventor: Yannick GUEDON