Patents by Inventor Ngai Wa Wong

Ngai Wa Wong 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).

  • ADAPTIVE POWER CONTROL
    Publication number: 20210367500
    Abstract: Disclosed herein is a method. An output voltage level is sensed. Determining if a power source delivers power to a system. If the output voltage is higher than a designed voltage threshold (Vh), then the power source will stop delivery of power to a circuit. If the output voltage is lower than another voltage threshold (Vl), the power source transfers power to the system until the output voltage reaches the designed voltage threshold (Vh).
    Type: Application
    Filed: May 19, 2020
    Publication date: November 25, 2021
    Inventors: Ka Wai Ho, Wan Tim Chan, Ngai Wa Wong, Chiu Sing Celement Tse
  • Dual-capacitors-based AC line frequency low voltage DC power supply circuit
    Patent number: 10164538
    Abstract: A supply circuit includes a rectifying bridge arranged in series between two high voltage capacitors. An AC line provides an intermediate voltage to a low voltage capacitor through the two high voltage capacitors. A plurality of resistors mounted in series with the two high voltage capacitors. A voltage clamping device limits the intermediate voltage at the low voltage capacitor and a linear series regulator provides an output DC voltage.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: December 25, 2018
    Assignee: Mosway Semiconductor Limited
    Inventors: Chi-Keung Tang, Chiu-Sing Celement Tse, Ngai Wa Wong
  • Dual-Capacitors-Based AC Line Frequency Low Voltage DC Power Supply Circuit
    Publication number: 20180367041
    Abstract: A supply circuit includes a rectifying bridge arranged in series between two high voltage capacitors. An AC line provides an intermediate voltage to a low voltage capacitor through the two high voltage capacitors. A plurality of resistors mounted in series with the two high voltage capacitors. A voltage clamping device limits the intermediate voltage at the low voltage capacitor and a linear series regulator provides an output DC voltage.
    Type: Application
    Filed: June 14, 2017
    Publication date: December 20, 2018
    Inventors: Chi-Keung Tang, Chiu-Sing Celement Tse, Ngai Wa Wong