Patents by Inventor Shao F. Shu

Shao F. Shu 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).

  • Gain enhancement technique for operational amplifiers
    Patent number: 5442318
    Abstract: A folded cascode operational amplifier using an improved gain enhancement technique is described. The folded cascode includes an input section, a cascode current mirror section, and a cascode current section. A first fully-differential operational amplifier is coupled to the cascode current mirror section to provide improved gain enhancement thereto and a second fully-differential operational amplifier is coupled to the cascode current source section to provide improved gain enhancement thereto. The differential inputs of the first fully-differential operational amplifier are coupled to feedback nodes of the cascode current mirror section and the differential outputs of the first fully-differential operational amplifier are coupled to control nodes of the cascode current mirror section.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: August 15, 1995
    Assignee: Hewlett Packard Corporation
    Inventors: Rajeev Badyal, Shao F. Shu