Patents by Inventor Yannick Guedon

Yannick Guedon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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: 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
  • 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: 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: 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: 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: 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
  • 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
  • Publication number: 20210377084
    Abstract: A power transmitter includes: a first switch coupled between a first node and a reference voltage node; a second switch configured to be coupled between a power supply and the first node; a coil and a capacitor coupled in series between the first node and the reference voltage node; a first sample-and-hold (S&H) circuit having an input coupled to the first node; and a timing control circuit configured to generate a first control signal, a second control signal, and a third control signal that have a same frequency, where the first control signal is configured to turn ON and OFF the first switch alternately, the second control signal is configured to turn ON and OFF the second switch alternately, and where the third control signal determines a sampling time of the first S&H circuit and has a first pre-determined delay from a first edge of the first control signal.
    Type: Application
    Filed: August 13, 2021
    Publication date: December 2, 2021
    Inventor: Yannick Guedon
  • Patent number: 11175319
    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.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: November 16, 2021
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Yannick Guedon, Baris Volkan Yildirim, Teerasak Lee
  • Publication number: 20210344205
    Abstract: An over-voltage protection circuit and methods of operation are provided. In one embodiment, a method includes monitoring a voltage at an output of a rectifier, a voltage at an output of a voltage regulator, or a combination thereof. The method further includes determining the over-voltage condition based on the monitoring; and in response to determining the over-voltage condition, regulating the voltage at the output of the rectifier in accordance with a voltage difference between the voltage at the output of the rectifier and the voltage at the output of the voltage regulator.
    Type: Application
    Filed: July 13, 2021
    Publication date: November 4, 2021
    Inventor: Yannick Guedon
  • Patent number: 11165286
    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.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: November 2, 2021
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Teerasak Lee, Chee Weng Cheong, Yannick Guedon, Eng Jye Ng
  • Patent number: 11140010
    Abstract: A power transmitter includes: a first switch coupled between a first node and a reference voltage node; a second switch configured to be coupled between a power supply and the first node; a coil and a capacitor coupled in series between the first node and the reference voltage node; a first sample-and-hold (S&H) circuit having an input coupled to the first node; and a timing control circuit configured to generate a first control signal, a second control signal, and a third control signal that have a same frequency, where the first control signal is configured to turn ON and OFF the first switch alternately, the second control signal is configured to turn ON and OFF the second switch alternately, and where the third control signal determines a sampling time of the first S&H circuit and has a first pre-determined delay from a first edge of the first control signal.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: October 5, 2021
    Assignee: STMicroelectronics Asia Pacific Pte Ltd.
    Inventor: Yannick Guedon
  • Patent number: 11128170
    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.
    Type: Grant
    Filed: June 10, 2020
    Date of Patent: September 21, 2021
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventor: Yannick Guedon
  • Patent number: 11095146
    Abstract: An over-voltage protection circuit and methods of operation are provided. In one embodiment, a method includes monitoring a voltage at an output of a rectifier, a voltage at an output of a voltage regulator, or a combination thereof. The method further includes determining the over-voltage condition based on the monitoring; and in response to determining the over-voltage condition, regulating the voltage at the output of the rectifier in accordance with a voltage difference between the voltage at the output of the rectifier and the voltage at the output of the voltage regulator.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: August 17, 2021
    Assignee: STMICROELECTRONICS ASIA PACIFIC PTE LTD.
    Inventor: Yannick Guedon
  • Publication number: 20210135912
    Abstract: A power transmitter includes: a first switch coupled between a first node and a reference voltage node; a second switch configured to be coupled between a power supply and the first node; a coil and a capacitor coupled in series between the first node and the reference voltage node; a first sample-and-hold (S&H) circuit having an input coupled to the first node; and a timing control circuit configured to generate a first control signal, a second control signal, and a third control signal that have a same frequency, where the first control signal is configured to turn ON and OFF the first switch alternately, the second control signal is configured to turn ON and OFF the second switch alternately, and where the third control signal determines a sampling time of the first S&H circuit and has a first pre-determined delay from a first edge of the first control signal.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 6, 2021
    Inventor: Yannick Guedon
  • Patent number: 10996699
    Abstract: A low drop-out (LDO) voltage regulator circuit includes a power transistor having a control terminal configured to receive a control signal and an output terminal coupled to an output node. A current regulation loop senses current flowing through the power transistor and modulates the control signal to cause the power transistor to output a constant current to the output node. A voltage regulation loop senses voltage at the output node and modulates the control signal to cause the power transistor to deliver current to the output node so that an output voltage at the output node is regulated. The current regulation loop includes a bipolar transistor connected to the control terminal of the power transistor, where a base terminal of the bipolar transistor is driven by a signal dependent on a difference between the sensed current flowing through the power transistor and a reference.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: May 4, 2021
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Qing Liu, Yannick Guedon