Patents by Inventor Weng Chong Sam

Weng Chong Sam 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).

  • Hysteresis-compensating interpolation circuits in optical encoders
    Patent number: 8841600
    Abstract: Disclosed are various embodiments of circuitry and methods to compensate for variations in hysteresis associated with the comparators of an interpolation circuit in a single track optical encoder. Such variations in hysteresis may be minimized or eliminated by providing appropriately configured resistor ladder circuits to condition the inputs to the comparators, or by programming or trimming resistors in positive feedback loops of the comparators. The single track optical encoder configurations disclosed herein permit very high resolution reflective optical encoders in small packages to be provided. Methods of making and using such optical encoders are also disclosed.
    Type: Grant
    Filed: October 31, 2010
    Date of Patent: September 23, 2014
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Chung Min Thor, Gim Eng Chew, Weng Chong Sam
  • Hysteresis-Compensating Interpolation Circuits in Optical Encoders
    Publication number: 20120104236
    Abstract: Disclosed are various embodiments of circuitry and methods to compensate for variations in hysteresis associated with the comparators of an interpolation circuit in a single track optical encoder. Such variations in hysteresis may be minimized or eliminated by providing appropriately configured resistor ladder circuits to condition the inputs to the comparators, or by programming or trimming resistors in positive feedback loops of the comparators. The single track optical encoder configurations disclosed herein permit very high resolution reflective optical encoders in small packages to be provided. Methods of making and using such optical encoders are also disclosed.
    Type: Application
    Filed: October 31, 2010
    Publication date: May 3, 2012
    Applicant: Avago Technologies ECBU (Singapore) Pte. Ltd.
    Inventors: Chung Min Thor, Gim Eng Chew, Weng Chong Sam