Patents by Inventor Louis Hau-Yiu TSUI

Louis Hau-Yiu TSUI 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).

  • OP-AMP sharing technique to remove memory effect in pipelined circuit
    Patent number: 9154091
    Abstract: This document describes a new op-amp sharing technique for pipeline ADC without memory effect. The key features of this technique are: the usage of negative impedance converter and scaled replica of the op-amp input device to achieve zero error voltage, which in turns achieve low power dissipation due to the removal of the tradeoff between op-amp sharing and memory effect. With this technique much lower operation of pipeline ADC can be achieved for applications of data communications and image signal processing.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: October 6, 2015
    Assignee: Microchip Technologies, Inc.
    Inventors: Louis Hau-Yiu Tsui, Isaac Terasuth Ko
  • OP-AMP Sharing Technique to Remove Memory Effect in Pipelined Circuit
    Publication number: 20140097897
    Abstract: This document describes a new op-amp sharing technique for pipeline ADC without memory effect. The key features of this technique are: the usage of negative impedance converter and scaled replica of the op-amp input device to achieve zero error voltage, which in turns achieve low power dissipation due to the removal of the tradeoff between op-amp sharing and memory effect. With this technique much lower operation of pipeline ADC can be achieved for applications of data communications and image signal processing.
    Type: Application
    Filed: September 12, 2013
    Publication date: April 10, 2014
    Applicant: Supertex, Inc.
    Inventors: Louis Hau-Yiu TSUI, Isaac Terasuth Ko