Patents by Inventor Bruce Long

Bruce Long 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).

  • Patent number: 4616212
    Abstract: A weighted capacitor digital to analog converter is disclosed which requires two stages but only one conversion step. By the use of an applied reference voltage and two groups of capacitors, the outputs of each group being coupled to an amplifier and feedback capacitor circuit, various capacitors in these groups can be selectively switched from the reference voltage to ground potential in response to input binary digit signals thereby presenting a predetermined amount of voltage to the output amplifiers depending upon the number and particular combination of capacitors switched or non-switched to ground.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: October 7, 1986
    Assignee: Xerox Corporation
    Inventors: Simon M. Law, Bruce Long