Patents by Inventor Richard F. Betts

Richard F. Betts 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).

  • Apparatus and method for headroom compensation using dynamic transconductance enhancement
    Patent number: 7245162
    Abstract: An output stage circuit may include a sourcing driver device, a nonlinear local feedback loop having a feedback transistor and a first current mirror, a sinking driver device, and an output signal. The output stage circuit may actively and dynamically adjust the transconductance of the sourcing driver device by sensing its region of operation, and by sending a nonlinear feedback signal through the local feedback loop and the first current mirror. The nonlinear local feedback loop may be used for control and headroom compensation of the sourcing driver transistor to provide low distortion operation using a smaller size driver transistor.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: July 17, 2007
    Assignee: Cypress Semiconductor Corp.
    Inventor: Richard F. Betts