Patents by Inventor Ryan P. Donohue

Ryan P. Donohue 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).

  • Programmable LED driver pad
    Patent number: 6266000
    Abstract: A light emitting diode (LED) driver pad comprising a multiplying digital to analog converter (MDAC), which allows for differing LED characteristics to be matched digitally. Either a plurality of MDACs are integrated onto a single integrated circuit, one MDAC per color of LED, or a single MDAC may be multiplexed to drive a plurality of different color LEDs. The MDAC allows for LED operating current to be set digitally, while allowing an overall brightness or intensity control, thus achieving uniform color balance over a range of operating characteristics.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: July 24, 2001
    Assignee: Agilent Technologies, Inc.
    Inventors: Gani Jusuf, Colm P. Lysaght, Ryan P. Donohue