Patents by Inventor Daniel H. Lam

Daniel H. Lam 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).

  • Method and apparatus for reducing distortion produced by a nonlinear device
    Patent number: 6396327
    Abstract: A predistortion circuit (102) includes a signal splitter (114), a diode network (118) and a signal combiner (116). The signal splitter (114) is splits an input signal into two portions. One of the signal portions is passed through the diode network (118) and combined with the other portion of the input signal in the signal combiner (116). The diode network (118) includes a plurality of diode circuits (204,206), each including two diode branches (208-214) coupled to an electrical ground (220). The resulting predistorted signal at the output (106) of the signal combiner is amplified, amplitude adjusted and injected into the nonlinear device (112). The input signal is predistorted such that distortion due to nonlinear characteristics of the nonlinear device (112) is reduced.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: May 28, 2002
    Assignee: Tacan Corporation
    Inventor: Daniel H. Lam