Patents by Inventor Thuan L. Nguyen

Thuan L. Nguyen 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).

  • Reducing kickback current to power supply during charge pump mode transitions
    Patent number: 9293986
    Abstract: Kickback current from a charge pump to a power management integrated circuit (PMIC) may be reduced by dissipating charge from fly and hold capacitors during mode transitions. A switch may be placed in series between the charge pump and the PMIC to disconnect the charge pump and prevent kickback current from reaching the PMIC. Further, additional loads, as switches, may be coupled to the charge pump outputs to dissipate charge from the fly and hold capacitors. Additionally, a closed feedback loop may be used to monitor and discharge excess charge from the fly and hold capacitors during mode transitions. Furthermore, charge may be redistributed between the fly and hold capacitors during mode transitions to reduce the time period of the transition.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: March 22, 2016
    Assignee: CIRRUS LOGIC, INC.
    Inventors: Bharath Kumar Thandri, Thuan L. Nguyen, Daniel John Allen, Lingli Zhang, Aniruddha Satoskar, Aaron Brennan, Dan Shen
  • REDUCING KICKBACK CURRENT TO POWER SUPPLY DURING CHARGE PUMP MODE TRANSITIONS
    Publication number: 20140340158
    Abstract: Kickback current from a charge pump to a power management integrated circuit (PMIC) may be reduced by dissipating charge from fly and hold capacitors during mode transitions. A switch may be placed in series between the charge pump and the PMIC to disconnect the charge pump and prevent kickback current from reaching the PMIC. Further, additional loads, as switches, may be coupled to the charge pump outputs to dissipate charge from the fly and hold capacitors. Additionally, a closed feedback loop may be used to monitor and discharge excess charge from the fly and hold capacitors during mode transitions. Furthermore, charge may be redistributed between the fly and hold capacitors during mode transitions to reduce the time period of the transition.
    Type: Application
    Filed: December 16, 2013
    Publication date: November 20, 2014
    Applicant: CIRRUS LOGIC, INC.
    Inventors: Bharath Kumar Thandri, Thuan L. Nguyen, Daniel John Allen, Lingli Zhang, Aniruddha Satoskar, Aaron Brennan, Dan Shen