Patents by Inventor Edwin Heijden

Edwin Heijden 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).

  • Voltage controlled oscillator
    Patent number: 7098746
    Abstract: A voltage-controlled oscillator comprising a LC tank circuit coupled to a pair of transistors and crossed-coupled to a pair of emitter follower transistors each transistor having a collector, an emitter and a base, the voltage controlled oscillator being characterized in that a supply voltage applied to the collectors of the emitter follower transistors is substantially different from a supply voltage applied to the bases of the emitter follower transistors.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: August 29, 2006
    Assignee: Koninklijke Phillps Electronics N.V.
    Inventors: Edwin Heijden, Hugo Veenstra
  • Voltage controlled oscillator
    Publication number: 20050258912
    Abstract: A voltage-controlled oscillator comprising a LC tank circuit (L1, L2, VD1, VD2) coupled to a pair of transistors (T2, T3) and crossed-coupled to a pair of emitter follower transistors (T0, T4) each transistor having a collector, an emitter and a base, the voltage controlled oscillator being characterized in that a supply voltage applied to the collectors of the emitter follower transistors (T0, T4) is substantially different from a supply voltage applied to the bases of the emitter follower transistors (T0, T4).
    Type: Application
    Filed: July 21, 2003
    Publication date: November 24, 2005
    Inventors: Edwin Heijden, Hugo Veenstra