Patents by Inventor Chuk Hung CHAN

Chuk Hung CHAN 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).

  • Power factor correction device, and current sensing method and apparatus thereof
    Patent number: 10181787
    Abstract: A PFC device includes at least one main switch, a converter that converts a current to be sensed in the PFC device into a voltage to be sensed, the PFC device generating a switch control signal to control the at least one main switch based on the current to be sensed, and a voltage sensor that receives the voltage to be sensed and an offset voltage, and senses the voltage to be sensed using the offset voltage to output a sense voltage. A method includes sampling the sense voltage, determining a sense value of the offset voltage based on a sampling result, and calculating the current to be sensed based on a difference between the sense voltage and the sense value.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: January 15, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Chuk Hung Chan
  • POWER FACTOR CORRECTION DEVICE, AND CURRENT SENSING METHOD AND APPARATUS THEREOF
    Publication number: 20180287488
    Abstract: A PFC device includes at least one main switch, a converter that converts a current to be sensed in the PFC device into a voltage to be sensed, the PFC device generating a switch control signal to control the at least one main switch based on the current to be sensed, and a voltage sensor that receives the voltage to be sensed and an offset voltage, and senses the voltage to be sensed using the offset voltage to output a sense voltage. A method includes sampling the sense voltage, determining a sense value of the offset voltage based on a sampling result, and calculating the current to be sensed based on a difference between the sense voltage and the sense value.
    Type: Application
    Filed: March 15, 2018
    Publication date: October 4, 2018
    Inventor: Chuk Hung CHAN