Patents by Inventor Yee Shing Chew

Yee Shing Chew 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).

  • High-speed input circuit
    Patent number: 9553445
    Abstract: A high-speed input circuit for industrial control provides an optoisolator protected by a series current regulator and shunting voltage regulator. The combined effect of the regulators is to allow the input circuit to work over a wide range of voltages while providing extremely fast response time.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: January 24, 2017
    Assignee: Rockwell Automation Asia Pacific Business Centre Pte. Ltd.
    Inventors: Chia Leong Chin, Yee Shing Chew, Tai Hock Khoo, Kok Kiong Lee
  • High-Speed Input Circuit
    Publication number: 20160233669
    Abstract: A high-speed input circuit for industrial control provides an optoisolator protected by a series current regulator and shunting voltage regulator. The combined effect of the regulators is to allow the input circuit to work over a wide range of voltages while providing extremely fast response time.
    Type: Application
    Filed: February 11, 2015
    Publication date: August 11, 2016
    Inventors: Chia Leong Chin, Yee Shing Chew, Tai Hock Khoo, Kok Kiong Lee