Patents by Inventor Koen Buisman

Koen Buisman 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).

  • Amplifier circuit
    Patent number: 9118283
    Abstract: An amplifier circuit comprising a driver (204, 304) configured to provide a switched mode input signal, a switching mode power amplifier (206, 306) configured to receive the switched mode input signal and provide an output signal for an external load (210, 310); and a sensor (208, 308) configured to sense the impedance of the external load (210, 310) The driver is configured to set the duty cycle of the switched mode input signal in accordance with the sensed impedance of the external load (210, 310).
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: August 25, 2015
    Assignee: NXP, B.V.
    Inventors: Koen Buisman, Mark Pieter van der Heijden, Mustafa Acar, Leo de Vreede
  • AMPLIFIER CIRCUIT
    Publication number: 20140077877
    Abstract: An amplifier circuit comprising a driver (204, 304) configured to provide a switched mode input signal, a switching mode power amplifier (206, 306) configured to receive the switched mode input signal and provide an output signal for an external load (210, 310); and a sensor (208, 308) configured to sense the impedance of the external load (210, 310) The driver is configured to set the duty cycle of the switched mode input signal in accordance with the sensed impedance of the external load (210, 310).
    Type: Application
    Filed: September 13, 2013
    Publication date: March 20, 2014
    Applicant: NXP B.V.
    Inventors: Koen Buisman, Mark Pieter van der Heijden, Mustafa Acar, Leo de Vreede
  • Semiconductor Device And Use Thereof
    Publication number: 20080191260
    Abstract: The semiconductor device comprises a first and a second varactor which are connected in an anti-series configuration. This connection is done such that a first, substantially electrically conductive region is present between a second region with dopant of a first conductivity type and a third region with dopant of the first conductivity type. The second and third regions comprise dopant that is distributed uniformly within the region. The first region is provided with or connected to a contact which has an AC resistance of at least 1 k?.
    Type: Application
    Filed: September 26, 2005
    Publication date: August 14, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Leonardus Cornelis Nicolaas De Vreede, Lis Karen Nanver, Koen Buisman