Patents by Inventor Shiguo Luo

Shiguo Luo 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: 10528109
    Abstract: A computer-implemented method enables determining an input power load for a multi voltage rail subsystem in an electronic device such as an information handing system. The method comprises determining a first output power value from a first voltage regulator and a second output power value from a second voltage regulator. A first input power value to the first voltage regulator is determined based at least partially on the first output power value and a second input power value to the second voltage regulator is determined based at least partially on the second output power value. An offset power value is calculated based on the first input power value and the second input power value. A total input power value is calculated based on the offset power value and a third input power value. The total input power value is transmitted to a processor.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: January 7, 2020
    Assignee: Dell Products, L.P.
    Inventors: Shiguo Luo, John Erven Jenne, Ralph H. Johnson, III
  • Patent number: 10466770
    Abstract: A method, a power control system, and an information handling system (IHS) for operating voltage regulators (VRs) in an IHS. The method includes detecting, via a VR controller, a real time current level of a processor and receiving a first temperature value from a temperature sensor. The VR controller calculates a modified current level based on the real time current level, the first temperature value and a pre-defined temperature value and applies the modified current level to the processor.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: November 5, 2019
    Assignee: Dell Products, L.P.
    Inventors: Shiguo Luo, Ralph H. Johnson, Kejiu Zhang
  • Publication number: 20190294480
    Abstract: An information handling system includes a voltage regulator control circuit having a programming resistor input pin for receiving an input from a programming resistor and an ammeter input for receiving a current value. A power source provides power to a load circuit coupled to the power source via a non-remote-sensing power connection. In accordance with at least one embodiment, the voltage regulator control circuit assures a reliable input to an overvoltage protection circuit of the voltage regulator control circuit regardless of states of connections of the load circuit to the power source.
    Type: Application
    Filed: March 23, 2018
    Publication date: September 26, 2019
    Inventors: Hang Li, Shiguo Luo, Mehran Mirjafari
  • Patent number: 10423210
    Abstract: A multiphase voltage regulator (VR) has a VR controller that performs automatic VR phase assignment and configuration for single or multi-output rails of an Information Handling System (IHS). VR power circuit has power stages selectably coupled to output voltage connection(s) or rail(s) that deliver electrical energy to information handling resource(s). VR controller is coupled to the VR power circuit and provides a first reference voltage (IREF) signal to the VR power circuit. VR controller identifies any power stages that return a load current monitor (IMON) signal that indicates that the respective power stage is coupled to the first IREF signal. VR controller regulates identified power stages of the VR power circuit during delivery of electrical power to information handling resource(s). Regulation is according to a VR configuration that is selected based on identified VR phases assigned to a first output voltage loop and associated with the first IREF signal.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: September 24, 2019
    Assignee: Dell Products, L.P.
    Inventors: Shiguo Luo, Kejiu Zhang, Ralph H. Johnson
  • Publication number: 20190272015
    Abstract: A method may include operating a power system coupled to at least one information handling resource, configured to provide electrical energy to the at least one information handling resource, and comprising a plurality of voltage regulator phases, in a plurality of operational modes, each mode defining a number of the plurality of voltage regulator phases operating in a fully-enabled mode and whether or not one of the plurality of voltage regulator phases operates in a light-load mode, selecting a selected operational mode from the plurality of operational modes based on a load requirement of the at least one information handling resource, and controlling the plurality of voltage regulator phases to deliver an aggregate current in accordance with the load requirement and the selected operational mode.
    Type: Application
    Filed: March 5, 2018
    Publication date: September 5, 2019
    Applicant: Dell Products L.P.
    Inventors: Feng-Yu WU, Shiguo LUO
  • Patent number: 10338669
    Abstract: An information handling system (IHS) includes temperature-compensated power control by a voltage regulation (VR) module to: (i) receive a monitored current (Imon) value from a current sensor integrated into the VR module; (ii) receive a temperature value from the temperature sensor also integrated into the VR module; (iii) determine a temperature-compensated Imon value based at least in part on the Imon value, the temperature value, and an empirically-derived temperature coefficient defined at the Imon value and the temperature value; and (iv) control the voltage-regulated power at least in part based on the temperature-compensated Imon value. The empirically-derived temperature coefficient adjusts for nonlinear portions of temperature coupling relationship between a portion of an integrated circuit (IC) die that can include the current sensor and the temperature sensor and a temperature experienced by by active portion of VR module.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: July 2, 2019
    Assignee: Dell Products, L.P.
    Inventors: Shiguo Luo, Kejiu Zhang, Feng-Yu Wu
  • Patent number: 10317966
    Abstract: A voltage regulation (VR) module of an Information Handling System (IHS) operates a switching direct current to direct current (DC-DC) voltage regulation (VR) power circuit in a constant current mode at a constant current level. The VR module approximates the capacitance value of the output capacitive load at the output terminal of the switching DC-DC VR power circuit based upon a time interval for output voltage to reach a threshold. The VR module then operates the switching DC-DC power circuit in constant output voltage mode using one group of VR operating settings to optimize performance for the capacitance value of the output capacitive load.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: June 11, 2019
    Assignee: Dell Products, L.P.
    Inventors: Ralph H. Johnson, Shiguo Luo
  • Publication number: 20190165679
    Abstract: Systems and methods for individual phase temperature monitoring and balance control in a multi-phase voltage regulator may include a plurality of smart power stages including a first smart power stage and a second smart power stage and a voltage regulator controller. The voltage regulator controller may send a first control signal to the first smart power stage to enable the first smart power stage to send a first temperature of the first smart power stage to the voltage regulator controller during a first phase of a switching cycle. The voltage regulator controller may also determine that the first temperature received by the voltage regulator controller corresponds to the first smart power stage based on the first control signal. The voltage regulator controller may further send a second control signal to the second smart power stage to enable the second smart power stage to send a second temperature to the voltage regulator controller during a second phase.
    Type: Application
    Filed: January 16, 2019
    Publication date: May 30, 2019
    Inventors: Mehran Mirjafari, Shiguo Luo, Lei Wang, Guangyong Zhu
  • Patent number: 10229027
    Abstract: A voltage regulator power reporting offset system includes a monitored power reporting subsystem that determines a monitored power level, offsets the monitored power level using voltage regulator operation offset information to provide a first offset monitored power level, and reports the first offset monitored power level to voltage regulator operation components. A processor power reporting component receives the report of the first offset monitored power level from the monitored power reporting subsystem. A processor power reporting offset subsystem receives the report of the first offset monitored power level from the processor power reporting component, offsets the first offset monitored power level using the processor operation offset information to provide a second offset monitored power level that is different than the first offset monitored power level, and reports the second offset monitored power level to a processing system.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: March 12, 2019
    Assignee: Dell Products L.P.
    Inventors: Shiguo Luo, Ralph Johnson
  • Patent number: 10224816
    Abstract: Systems and methods for individual phase temperature monitoring and balance control in a multi-phase voltage regulator may include a plurality of smart power stages including a first smart power stage and a second smart power stage and a voltage regulator controller. The voltage regulator controller may send a first control signal to the first smart power stage to enable the first smart power stage to send a first temperature of the first smart power stage to the voltage regulator controller during a first phase of a switching cycle. The voltage regulator controller may also determine that the first temperature received by the voltage regulator controller corresponds to the first smart power stage based on the first control signal. The voltage regulator controller may further send a second control signal to the second smart power stage to enable the second smart power stage to send a second temperature to the voltage regulator controller during a second phase.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: March 5, 2019
    Assignee: Dell Products L.P.
    Inventors: Mehran Mirjafari, Shiguo Luo, Lei Wang, Guangyong Zhu
  • Publication number: 20180364784
    Abstract: A multiphase voltage regulator (VR) has a VR controller that performs automatic VR phase assignment and configuration for single or multi-output rails of an Information Handling System (IHS). VR power circuit has power stages selectably coupled to output voltage connection(s) or rail(s) that deliver electrical energy to information handling resource(s). VR controller is coupled to the VR power circuit and provides a first reference voltage (IREF) signal to the VR power circuit. VR controller identifies any power stages that return a load current monitor (IMON) signal that indicates that the respective power stage is coupled to the first IREF signal. VR controller regulates identified power stages of the VR power circuit during delivery of electrical power to information handling resource(s). Regulation is according to a VR configuration that is selected based on identified VR phases assigned to a first output voltage loop and associated with the first IREF signal.
    Type: Application
    Filed: June 19, 2017
    Publication date: December 20, 2018
    Inventors: SHIGUO LUO, KEJIU ZHANG, RALPH H. JOHNSON
  • Publication number: 20180321735
    Abstract: A method, a power control system, and an information handling system (IHS) for operating voltage regulators (VRs) in an IHS. The method includes detecting, via a VR controller, a real time current level of a processor and receiving a first temperature value from a temperature sensor. The VR controller calculates a modified current level based on the real time current level, the first temperature value and a pre-defined temperature value and applies the modified current level to the processor.
    Type: Application
    Filed: May 5, 2017
    Publication date: November 8, 2018
    Inventors: SHIGUO LUO, RALPH H. JOHNSON, KEJIU ZHANG
  • Patent number: 10116212
    Abstract: A direct current (DC) power supply system performs a method of delivering electrical energy by a synchronous buck voltage regulator (VR) coupled to an information handling resource of an information handling system by switching between a high side (HS) control switch and a low side (LS) synchronous switch to regulate a direct current (DC) output voltage (VOUT) generated from an input voltage (VIN). Inductor current (IMON) values of the voltage regulator are measured during LS synchronous switch ON state. IMON values of the voltage regulator are synthesized during HS power switch ON state. A complete inductor current signal is generated that combines the measured and synthesized IMON values.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: October 30, 2018
    Assignee: Dell Products, L.P.
    Inventors: Shiguo Luo, Kejiu Zhang, Ralph H. Johnson
  • Publication number: 20180309366
    Abstract: Systems and methods for adaptive modulation of MOSFET driver key parameters for improved voltage regulator efficiency and reliability in a voltage regulator may include a power stage. The power stage may include a high side switch including a high side gate, a peak voltage detection circuit, and a high side driver strength modulator circuit. The high side driver strength modulator circuit may determine a high side driver strength level. The high side driver strength modulator circuit may also connect a subset of the set of high side gate drivers to the high side gate based on the high side driver strength level. The high side driver strength modulator circuit may also disconnect a remaining subset of the set of high side gate drivers from the high side gate.
    Type: Application
    Filed: April 19, 2017
    Publication date: October 25, 2018
    Inventors: Kejiu Zhang, Shiguo Luo, Ralph H. Johnson
  • Patent number: 10108252
    Abstract: A voltage regulator for delivering power to a processor subsystem within an information handling system is disclosed. The voltage regulator includes an interface to an embedded controller for receiving a linear load line impedance and an intelligent load line controller. The intelligent load line controller may enable linear load line control, determine that a nonlinear load line condition is satisfied, and enable nonlinear load line control based on the determination that the nonlinear load line condition is satisfied.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: October 23, 2018
    Assignee: Dell Products L.P.
    Inventors: Kejiu Zhang, Shiguo Luo, Ralph H. Johnson, III, Hang Li
  • Publication number: 20180269786
    Abstract: Systems and methods for individual phase temperature monitoring and balance control in a multi-phase voltage regulator may include a plurality of smart power stages including a first smart power stage and a second smart power stage and a voltage regulator controller. The voltage regulator controller may send a first control signal to the first smart power stage to enable the first smart power stage to send a first temperature of the first smart power stage to the voltage regulator controller during a first phase of a switching cycle. The voltage regulator controller may also determine that the first temperature received by the voltage regulator controller corresponds to the first smart power stage based on the first control signal. The voltage regulator controller may further send a second control signal to the second smart power stage to enable the second smart power stage to send a second temperature to the voltage regulator controller during a second phase.
    Type: Application
    Filed: March 16, 2017
    Publication date: September 20, 2018
    Inventors: Mehran Mirjafari, Shiguo Luo, Lei Wang, Guangyong Zhu
  • Publication number: 20180262108
    Abstract: A direct current (DC) power supply system performs a method of delivering electrical energy by a synchronous buck voltage regulator (VR) coupled to an information handling resource of an information handling system by switching between a high side (HS) control switch and a low side (LS) synchronous switch to regulate a direct current (DC) output voltage (VOUT) generated from an input voltage (VIN). Inductor current (IMON) values of the voltage regulator are measured during LS synchronous switch ON state. IMON values of the voltage regulator are synthesized during HS power switch ON state. A complete inductor current signal is generated that combines the measured and synthesized IMON values.
    Type: Application
    Filed: March 13, 2017
    Publication date: September 13, 2018
    Inventors: SHIGUO LUO, KEJIU ZHANG, RALPH H. JOHNSON
  • Patent number: 10056754
    Abstract: A voltage regulator may comprise a high-side switch and a low-side switch for delivering electrical current to the at least one information handling resource, a high-side driver configured to drive a high-side driving voltage for regulating a first electrical current of the high-side switch, a low-side driver configured to drive a low-side driving voltage for regulating a second electrical current of the low-side switch, and a control circuit configured to operate the at least one voltage regulator in both of a fixed dead time mode and an adaptive dead time mode.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: August 21, 2018
    Assignee: Dell Products L.P.
    Inventors: Kejiu Zhang, Shiguo Luo, Hang Li
  • Patent number: 10020736
    Abstract: A method and an information handling system (IHS) perform current calibration of a multi-phase voltage regulator (VR) by using a calibrated operating phase to calibrate an unknown operating phase. A calibration controller, using a pulse width modulation (PWM) controller, enables a first unknown operating phase within a first converter sub-circuit in the multiphase VR. The calibration controller enables a calibrated circuit component electronically coupled to the first unknown operating phase. The calibration controller determines a target voltage for the first unknown operating phase based on sense component specifications. The calibration controller determines, for the first unknown operating phase, a sense voltage that identifies the first unknown operating phase as a first evaluated operating phase.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: July 10, 2018
    Assignee: Dell Products, L.P.
    Inventors: Feng-Yu Wu, Tsai-Fu Hung, Shin-Chen Wang, Shiguo Luo, Kejiu Zhang
  • Patent number: 10013004
    Abstract: In accordance with embodiments of the present disclosure, an information handling system may include an information handling resource, a voltage regulator, a non-transitory computer-readable medium, and a controller. The voltage regulator may be coupled to the information handling resource and configured to deliver electrical energy to the information handling resource. The a non-transitory computer-readable medium may have stored thereon curve fit information, the curve fit information including coefficients of a polynomial for approximating a parameter indicative of the power efficiency of the voltage regulator as a function of a measured output current of the voltage regulator. The controller may be coupled to the voltage regulator and configured to receive information indicative of an output power of the voltage regulator and, based on the information indicative of an output power of the voltage regulator and the curve fit information, calculate an input current of the voltage regulator.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: July 3, 2018
    Assignee: Dell Products L.P.
    Inventors: Abey K. Mathew, Shiguo Luo