Patents by Inventor Kin Keung Lau

Kin Keung Lau 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).

  • Publication number: 20210099085
    Abstract: The present disclosure relates to a switch capacitor converter with high efficiency and a small size. The converter according to one aspect of the present disclosure is provided for receiving an input voltage through an input terminal and supplying an output voltage through an output terminal, the converter comprising: a first capacitor; a second capacitor; a third capacitor; and a switch network for changing a connection relationship between the input terminal, the output terminal, the first capacitor, the second capacitor, and the third capacitor. A ratio of the input voltage to the output voltage implemented in the converter is selectable from 4:1, 3:1, or 2:1 depending on an operation of the switch network.
    Type: Application
    Filed: August 12, 2020
    Publication date: April 1, 2021
    Applicant: SILICON MITUS, INC
    Inventor: Kin Keung LAU
  • Patent number: 9973090
    Abstract: The present invention provides a buck-boost converter including a converter power stage, a first mode control unit, and a second mode control unit. In the buck-boost converter, the converter power stage may include at least one inductor and a plurality of switching devices. Further, the first mode control unit may operate the converter power stage in a buck mode and regulate an output voltage of the converter power stage as a first voltage. Further, the second mode control unit may operate the converter power stage in a boost mode or a buck-boost mode, and regulate an output voltage of the converter power stage as a second voltage higher than the first voltage.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: May 15, 2018
    Assignee: Silicon Mitus, Inc.
    Inventor: Kin Keung Lau
  • Publication number: 20180115245
    Abstract: The present invention provides a buck-boost converter including a converter power stage, a first mode control unit, and a second mode control unit. In the buck-boost converter, the converter power stage may include at least one inductor and a plurality of switching devices. Further, the first mode control unit may operate the converter power stage in a buck mode and regulate an output voltage of the converter power stage as a first voltage. Further, the second mode control unit may operate the converter power stage in a boost mode or a buck-boost mode, and regulate an output voltage of the converter power stage as a second voltage higher than the first voltage.
    Type: Application
    Filed: October 20, 2016
    Publication date: April 26, 2018
    Inventor: Kin Keung LAU
  • Patent number: 9052368
    Abstract: Negative peak voltage detection for battery end of life estimations in fuel gauging is disclosed. Battery powered devices such cell phones and laptop computers create some noise in the form of negative excursions from the average output voltage of the battery which can cause the battery powered device to stop functioning. By negative peak detection relative to the average battery voltage, the end of life or discharged voltage condition can be altered in response to the negative peaks to obtain the maximum battery life without risk of the device inadvertently shutting down. Average output voltage of the battery may be taken as an estimated open circuit voltage or some other battery voltage. Various embodiments are disclosed.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: June 9, 2015
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Jason Allen Wortham, Joseph Brian Vanden Wymelenberg, Kin Keung Lau
  • Publication number: 20120153960
    Abstract: Negative peak voltage detection for battery end of life estimations in fuel gauging is disclosed. Battery powered devices such cell phones and laptop computers create some noise in the form of negative excursions from the average output voltage of the battery which can cause the battery powered device to stop functioning. By negative peak detection relative to the average battery voltage, the end of life or discharged voltage condition can be altered in response to the negative peaks to obtain the maximum battery life without risk of the device inadvertently shutting down. Average output voltage of the battery may be taken as an estimated open circuit voltage or some other battery voltage. Various embodiments are disclosed.
    Type: Application
    Filed: December 9, 2011
    Publication date: June 21, 2012
    Applicant: MAXIM INTEGRATED PRODUCTS, INC.
    Inventors: Jason Allen Wortham, Joseph Brian Vanden Wymelenberg, Kin Keung Lau
  • Patent number: 5804958
    Abstract: A voltage control temperature compensated circuit for coupling to a supply that provides a supply voltage at first (102) and second supply nodes (103) and the voltage control circuit for generating and regulating an output voltage (VREG). The voltage control circuit includes an output device (18) coupled to the first and second supply nodes for generating the output voltage and a base coupled bipolar pair controller (15 and 14) coupled to the first and second supply nodes for generating an internal high-side (106) voltage reference (104) and for regulating the output voltage to compensate for changes from the desired response between the output voltage and the internal reference voltage.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: September 8, 1998
    Assignee: Motorola, Inc.
    Inventors: Mung Laam Tsui, Kin Keung Lau