Patents by Inventor Gerrit J. Bollen

Gerrit J. Bollen 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).

  • Driver circuit for reducing the effects of disturbances on the duty cycle of a digital signal on a bus conductor
    Patent number: 7466167
    Abstract: An electronic circuit contains a driver circuit (12) with an output coupled to a digital communication conductor (14), for driving changes of a potential at the digital communication conductor (14) to and from a digital signal level. The driver circuit (12) comprises a control circuit (120), to generate selection signals that select increasingly stronger drive strengths and increasingly weaker drive strengths during changes to and from the digital level respectively. A controllable current supply circuit (122, 124), has a current control input coupled to the control circuit (120) for receiving the selection signals and a current supply output coupled to the digital communtication conductor (14). A detector circuit (126) has an input coupled to the digital communtication conductor (14) and an output coupled to the control circuit (120), and arranged to detect whether a potential at the digital communication conductor (12) has reached a required range.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: December 16, 2008
    Assignee: NXP B.V.
    Inventors: Ruurd A. Visser, Marcellinus W. M. Oosterhuis, Gerrit J. Bollen