Patents by Inventor A. Th. van der Heiden

A. Th. van der Heiden 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).

  • Testable IC having analog and digital circuits
    Patent number: 6389567
    Abstract: The invention relates to an integrated circuit with at least an analog and a digital circuit that are interconnected by a signal path. In order to enable separate testing of the circuits, for example in accordance with the macro test approach, in the signal path a special seam circuit (200) is inserted. The seam circuit (200) is essentially a feedback loop (214) having a scannable flip-flop (210) and a multiplexer (220). The flip-flop (210) feeds a first input of the multiplexer (220), whereas a second input of the multiplexer (220) establishes an input (230) of the seam circuit (200). An output of the feedback loop (214) establishes an output of the seam circuit (200).
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: May 14, 2002
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Gaston M. I. Porteners, Robert H. De Nie, Johannes Th. Van Der Heiden, Roland P. Jansen, Petrus A. L. De Jong, Petrus A. J. M. Palm, Vincent Pronk
  • TESTABLE IC HAVING ANALOG AND DIGITAL CIRCUITS
    Publication number: 20010049806
    Abstract: The invention relates to an integrated circuit with at least an analog and a digital circuit that are interconnected by a signal path. In order to enable separate testing of the circuits, for example in accordance with the macro test approach, in the signal path a special seam circuit (200) is inserted. The seam circuit (200) is essentially a feedback loop (214) having a scannable flip-flop (210) and a multiplexer (220). The flip-flop (210) feeds a first input of the multiplexer (220), whereas a second input of the multiplexer (220) establishes an input (230) of the seam circuit (200). An output of the feedback loop (214) establishes an output of the seam circuit (200).
    Type: Application
    Filed: April 16, 1999
    Publication date: December 6, 2001
    Inventors: GASTON M.I. PORTENERS, ROBERT H. DE NIE, JOHANNES TH. VAN DER HEIDEN, ROLAND P. JANSEN, PETRUS A.L. DE JONG, PETRUS A.J.M. PALM, VINCENT PRONK
  • Method and apparatus for measuring stairs
    Patent number: 5533270
    Abstract: The invention relates to a method for measuring at least one step of a stair, wherein the riser and tread of the or each separate step are determined, characterized in that at least two steps of the stair are provided, in a corresponding manner, with a reference point, whereupon a pin is positioned in each reference point, which two pins cross in a junction in such a manner that of each pin the length between the reference point and the junction is known, whereupon in the plane defined by the pins the angle is recorded that each of the pins includes with a reference line, which reference line includes a known angle, lying in the plane, with the vertical, and to an assembly for carrying out such a method.
    Type: Grant
    Filed: November 2, 1994
    Date of Patent: July 9, 1996
    Assignee: Thyssen de Reus B.V.
    Inventor: A. Th. van der Heiden