Patents by Inventor Yu Wing Choi

Yu Wing Choi 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).

  • Driver for an optical transmitter
    Patent number: 7639954
    Abstract: A modulation driver for delivering an output modulation current for driving an optical source of an optical transmitter, the output modulation current comprises a first modulation current region characterised with a first temperature gradient and a second modulation current region characterised with a second temperature gradient, said first modulation current region and said second modulation region being for delivering modulation current at a first temperature range and a second temperature range, temperatures of said second temperature being higher than temperatures of said first temperature range, said second temperature gradient being larger than said first temperature gradient.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: December 29, 2009
    Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
    Inventors: Kut Hing Lam, Yu Wing Choi, Torsten Wipiejewski