Patents by Inventor Kai D. Fong

Kai D. Fong 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).

  • Differential photoelectric receiver circuit
    Patent number: 6707023
    Abstract: A photoelectric receiver circuit for converting an optical signal to an electrical signal, includes first and second transimpedance amplifiers, a photodiode having a first end connected to an inverting input of the first transimpedance amplifier and a second end connected to an inverting input of the second transimpedance amplifier, and a differential amplifier having inputs AC coupled to outputs of the first and second transimpedance amplifiers. Such that when higher and lower voltages are respectively applied to the non-inverting inputs of the first and second transimpedance amplifiers, a substantially constant bias voltage is maintained on the photodiode.
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: March 16, 2004
    Assignee: International Business Machines Corporation
    Inventors: Kai D. Fong, Lee F. Hartley