Patents by Inventor Kwong-Han H. Leung

Kwong-Han H. Leung 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).

  • Monolithic optoelectronic integrated circuit
    Patent number: 5237633
    Abstract: A monolithic optoelectronic integrated circuit having an optical emission portion (18) and a drive portion (11, or 22 and 21). The drive portion is capable of accepting TTL and standard CMOS logic voltage levels. In a first embodiment, the monolithic optoelectronic integrated circuit (10) has a light emitting diode (18) driven by a dual gate FET (11). In a second embodiment, the monolithic optoelectronic integrated circuit (20) has a light emitting diode (18) driven by two FETs (22 and 21). In each embodiment (10 or 20), a gate (13 or 23) of the respective drive circuit accepts the TTL or standard CMOS logic voltage. Further, in each embodiment current limiting is accomplished by coupling a gate with the source of the FET (11 or 22). Thus, the output of the light emitting diode (18, 18) is controlled by an input signal to the drive circuit.
    Type: Grant
    Filed: November 14, 1991
    Date of Patent: August 17, 1993
    Assignee: Motorola, Inc.
    Inventors: Craig A. Gaw, Paige M. Holm, Kwong-Han H. Leung, George W. Rhyne, Daniel L. Rode