Patents by Inventor Michael Couleur

Michael Couleur 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: 11171563
    Abstract: A power converter circuit that includes a switch node coupled to a regulated power supply node via an inductor may, during a discharge cycle, sink current from the regulated power supply node. A control circuit may generate the rising and falling ramp signals using voltage levels of an input power supply node and the regulated power supply node. The control circuit may also determine a duration of the discharge cycle using results of comparing respective voltage levels of the generated rising and falling ramp signals.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: November 9, 2021
    Assignee: Apple Inc.
    Inventors: Michael Couleur, Yesim Inam, Dashun Xue
  • Publication number: 20210247827
    Abstract: A power converter circuit that includes a switch circuit, and multiple phase and amplifier circuits, may generate a voltage level on a regulated power supply node of a computer system. The amplifier circuits may generate respective demand currents using a voltage level of the regulated power supply node and a reference voltage. In response to activation of a multi-phase operating mode, the switch circuit may short the outputs of the amplifier circuits to generate a common demand current. The multiple phase circuits may sequentially source current to regulated power supply node using the common demand current.
    Type: Application
    Filed: February 7, 2020
    Publication date: August 12, 2021
    Inventors: Michael Couleur, Nicola Rasera, Siarhei Meliukh
  • Patent number: 11086378
    Abstract: A power converter circuit that includes a switch circuit, and multiple phase and amplifier circuits, may generate a voltage level on a regulated power supply node of a computer system. The amplifier circuits may generate respective demand currents using a voltage level of the regulated power supply node and a reference voltage. In response to activation of a multi-phase operating mode, the switch circuit may short the outputs of the amplifier circuits to generate a common demand current. The multiple phase circuits may sequentially source current to regulated power supply node using the common demand current.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: August 10, 2021
    Assignee: Apple Inc.
    Inventors: Michael Couleur, Nicola Rasera, Siarhei Meliukh
  • Publication number: 20210226536
    Abstract: A method and apparatus for operating a DC-DC converter in an interleaved (or rotating) pulse frequency modulation (PFM) mode is disclosed. A DC-DC converter includes a number of inductor pairs, with each inductor coupled to a corresponding pulse control circuit. During a cycle in which one of the pulse control circuits sources a current pulse through its respectively coupled inductor, a second pulse control circuit coupled to the other inductor of the pair determines if a voltage on its output node (e.g., where it is coupled to its inductor) is less than a threshold voltage. Responsive to determining that the voltage on its output node is less than the threshold, the second pulse control circuit activates a current path through the other inductor of the pair.
    Type: Application
    Filed: January 20, 2020
    Publication date: July 22, 2021
    Inventors: Michael Couleur, Shawn Searles, Nikola Jovanovic
  • Publication number: 20210126539
    Abstract: A DC-DC converter that provides both buck and boost voltages using a single inductor is disclosed. The DC-DC converter includes an H-bridge circuit having an inductor having first and second terminals, and a number of switches. The switches include a first switch coupled between the second inductor terminal and a boost voltage node, a second switch coupled between the second inductor terminal and a buck voltage node, and a third switch coupled between the first inductor terminal and an input voltage node. A control circuit is coupled to activate the switches in accordance with a number of different phases such that a buck voltage (e.g., less than the input voltage) is provided on the buck voltage node, while a boost voltage (e.g., greater than the input voltage) is provided on the boost voltage node.
    Type: Application
    Filed: October 8, 2020
    Publication date: April 29, 2021
    Inventors: Michael Couleur, Nicola Rasera, Siarhei Meliukh
  • Patent number: 10903741
    Abstract: A power converter circuit included in a computer system may include an adiabatic charge pump which includes multiple capacitors different numbers of which are used to charge and discharge a switch node coupled to regulated power supply node via an inductor. A control circuit may control the dividing ratio of the charge pump circuit as well as determine respective durations of when the charge pump circuit is charging and discharging the switch node.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: January 26, 2021
    Assignee: Apple Inc.
    Inventors: Michael Couleur, Nikola Javanovic, Siarhei Meliukh
  • Publication number: 20210018543
    Abstract: A power converter circuit included in a computer system may charge and discharge a switch node coupled to a regulated power supply node via an inductor. The power converter circuit may generate a reference clock signal using a system clock signal and a voltage level of the switch node. The reference clock signal may be used to initiate a charge cycle, whose duration may be based on generated ramp signals.
    Type: Application
    Filed: July 19, 2019
    Publication date: January 21, 2021
    Inventors: Michael Couleur, Andrea Acquas, Nikola Jovanovic
  • Patent number: 10884043
    Abstract: A power converter circuit included in a computer system may charge and discharge a switch node coupled to a regulated power supply node via an inductor. The power converter circuit may generate a reference clock signal using a system clock signal and a voltage level of the switch node. The reference clock signal may be used to initiate a charge cycle, whose duration may be based on generated ramp signals.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: January 5, 2021
    Assignee: Apple Inc.
    Inventors: Michael Couleur, Andrea Acquas, Nikola Jovanovic
  • Publication number: 20200350819
    Abstract: A power converter circuit that includes a switch node coupled to a regulated power supply node via an inductor may, during a discharge cycle, sink current from the regulated power supply node. A control circuit may generate the rising and falling ramp signals using voltage levels of an input power supply node and the regulated power supply node. The control circuit may also determine a duration of the discharge cycle using results of comparing respective voltage levels of the generated rising and falling ramp signals.
    Type: Application
    Filed: April 30, 2019
    Publication date: November 5, 2020
    Inventors: Michael Couleur, Yesim Inam, Dashun Xue
  • Patent number: 10804803
    Abstract: A DC-DC converter that provides both buck and boost voltages using a single inductor is disclosed. The DC-DC converter includes an H-bridge circuit having an inductor having first and second terminals, and a number of switches. The switches include a first switch coupled between the second inductor terminal and a boost voltage node, a second switch coupled between the second inductor terminal and a buck voltage node, and a third switch coupled between the first inductor terminal and an input voltage node. A control circuit is coupled to activate the switches in accordance with a number of different phases such that a buck voltage (e.g., less than the input voltage) is provided on the buck voltage node, while a boost voltage (e.g., greater than the input voltage) is provided on the boost voltage node.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: October 13, 2020
    Assignee: Apple Inc.
    Inventors: Michael Couleur, Nicola Rasera, Siarhei Meliukh
  • Patent number: 10763750
    Abstract: A power converter circuit included in a computer system may charge and discharge a switch node coupled to a regulated power supply node via an inductor. During a discharge cycle, the power converter circuit may sense a current being discharge from the regulated power supply node through the inductor into a ground supply node. The power converter circuit may also sense a noise current flowing in the ground supply node, and generate a control current using both the current being discharge and the noise current. Using the control current, the power converter circuit may halt the discharge cycle.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: September 1, 2020
    Assignee: Apple Inc.
    Inventors: Nikola Jovanovic, Michael Couleur
  • Patent number: 10707761
    Abstract: A power converter circuit included in a computer system may charge and discharge a switch node coupled to a regulated power supply node via an inductor. During a charge cycle, the power converter circuit may generate a reference ramp signal that has an initial voltage level greater than that of the switch node. The power converter may also generate a sense ramp signal using the voltage level of the switch node, and halt the charge cycle using results of a comparison of the respective voltage levels of the reference ramp signal and the sense ramp signal.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: July 7, 2020
    Assignee: Apple Inc.
    Inventors: Michael Couleur, Andrea Acquas, Nicola Rasera
  • Patent number: 10644592
    Abstract: Systems, apparatuses, and methods for efficiently generating a stable output for a transient load for one or more components are described. In various embodiments, a power converter includes two feedback loops to separate the stability and the equivalent output resistance, which allows the bandwidth to increase. The first loop includes a compensator receiving an output current of an amplifier. Additionally, a first converter and a first current mirror generate a target current based on the output current of the amplifier. Based on the target current, multiple step-down converters generate an output voltage, which is returned to the amplifier through a resistor. The second loop includes a second converter with a first order series RC filter to reduce the second loop's response time. A second current mirror receives current from the second converter and generates a dynamically adapting feedback current, which flows through the resistor in the first loop.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: May 5, 2020
    Assignee: Apple Inc.
    Inventors: Fabio Ongaro, Michael Couleur
  • Patent number: 10630174
    Abstract: Disclosed examples include a transient event detector circuit to detect transient events in a switching converter, including a DLL circuit to detect changes in a duty cycle of a pulse width modulation signal used to operate a switching converter, and an output circuit to provide a status output signal in a first state when no transient event is detected, and to provide the status output signal in a second state indicating a transient event in the switching converter in response to a detected change in the duty cycle of the pulse width modulation signal.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: April 21, 2020
    Assignee: Texas Instruments Incorporated
    Inventors: Michael Couleur, Neil Gibson, Antonio Priego
  • Patent number: 10601412
    Abstract: Disclosed examples include self-biased DLL circuits to generate a bias current signal proportional to a repetition frequency of a first signal representing continuous switching or discontinued switching operation of the DC-DC converter. The DLL circuit includes a monostable multivibrator to provide a pulse output signal in response to an edge of the first signal with a pulse duration set by a control current signal, a phase detector to provide output signals according to a phase difference between an edge of the pulse output signal and the first signal, and an output circuit to provide an output signal according to the phase detector output signals and according to an offset signal, to provide the bias current signal according to the output signal, and to provide the control current signal according to the output signal.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: March 24, 2020
    Assignee: Texas Instruments Incorporated
    Inventors: Michael Couleur, Neil Gibson, Antonio Priego
  • Patent number: 10425009
    Abstract: A regulator circuit that employs coupled inductors with on-time modulation is disclosed. The regulator circuit includes a driver circuit coupled via first and second inductors to a power supply node of a load circuit, and may charge the power supply node via the first inductor for a first charging period, and charge the power supply node via the second inductor for a second charging period. A control circuit may determine durations of the first and second charging periods using respective pluralities of currents.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: September 24, 2019
    Assignee: Apple Inc.
    Inventors: Michael Couleur, Fabio Ongaro, Dashun Xue
  • Publication number: 20190229622
    Abstract: An apparatus includes a plurality of pulse control circuits and a control circuit. A given pulse control circuit of the plurality of pulse control circuits may source a current pulse to the output power signal based on a comparison of a particular feedback signal of a plurality of feedback signals and a target voltage signal. The control circuit may offset a voltage level of each feedback signal of a first subset of the plurality of feedback signals. The first subset may exclude a first feedback signal. In response to a determination that a period of time has ended, the control circuit may offset a voltage level of each feedback signal of a second subset of the plurality of feedback signals. The second subset may include the first feedback signal and exclude a second feedback signal.
    Type: Application
    Filed: April 2, 2019
    Publication date: July 25, 2019
    Inventors: Michael Couleur, Fabio Ongaro, Nikola Jovanovic, Frank Trautmann
  • Patent number: 10348198
    Abstract: Systems, apparatuses, and methods for generating a stable output voltage for one or more components by checking feedback information for an entire clock period are described. In various embodiments, a power converter generates an output voltage for one or more components. When the load current drawn by the one or more components changes, an inductor current of a low pass filter and monitored by a current sense amplifier also changes. The clock period is divided into a high phase and a low phase with one of the phases being a relatively short phase. During the relatively short phase, the current sense amplifier does not have sufficient time to measure feedback information. Instead of selecting a voltage output of the current sense amplifier, control logic selects a voltage output of a voltage generator, which emulates a voltage ramp with a slope of the inductor current during the relatively short phase.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: July 9, 2019
    Assignee: Apple Inc.
    Inventors: Fabio Ongaro, Michael Couleur
  • Patent number: 10340803
    Abstract: A DC-to-DC voltage converter includes a converter input for receiving a DC voltage. A first switch is coupled between the input and a first node. A second switch is coupled between the first node and a ground. An inductor is coupled between the first node and a converter output. A capacitor is coupled between the converter output and ground. An output voltage synthesizer is coupled to the converter input and the converter output for synthesizing the voltage at the first node and for generating a control signal for at least one of the first switch and the second switch in response to the voltages at the converter input and the converter output.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: July 2, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Neil Gibson, Michael Couleur, Antonio Priego, Stefan Herzer, Syed Wasif Mehdi
  • Publication number: 20190123641
    Abstract: Disclosed examples include a transient event detector circuit to detect transient events in a switching converter, including a DLL circuit to detect changes in a duty cycle of a pulse width modulation signal used to operate a switching converter, and an output circuit to provide a status output signal in a first state when no transient event is detected, and to provide the status output signal in a second state indicating a transient event in the switching converter in response to a detected change in the duty cycle of the pulse width modulation signal.
    Type: Application
    Filed: December 19, 2018
    Publication date: April 25, 2019
    Inventors: Michael Couleur, Neil Gibson, Antonio Priego