Patents by Inventor Buitendijk

Buitendijk 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: 9297172
    Abstract: A scaffold has several spaced apart systems of construction frames present on top of each other, as well as handrail frames that extend between the construction frames. The construction frames have three posts connected together by crossbars, in which the front post is shorter than the other two. The handrail frames are attached to these short posts. Each handrail frame is built up of two post sections with a handrail and a side plank between them. The post sections form half of a lengthwise divided post. The post sections of two adjacent handrail frames thus form one whole post, which can be inserted into the short post of a construction frame. As the post sections are part of the handrail frames, the handrail frames can be easily attached to the short posts already present at the front of the construction frames.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: March 29, 2016
    Assignee: XS Platforms Holding B.V.
    Inventor: Dick Buitendijk
  • Publication number: 20100231297
    Abstract: The present invention relates to an electronic device that includes an integrated power comparator circuit (1) for a self-oscillating class D system (100). The integrated power comparator circuit (1) has a modulation stage (10), wherein the modulation stage (10) comprises a compensation circuit (40) for providing a compensation signal to the modulation stage, which is dimensioned for compensating a variation of a process parameter for smoothing initialization of the self-oscillating class D system (100).
    Type: Application
    Filed: August 10, 2007
    Publication date: September 16, 2010
    Applicant: NXP, B.V.
    Inventor: Pieter Buitendijk
  • Publication number: 20100140018
    Abstract: A scaffold has several spaced apart systems of construction frames present on top of each other, as well as handrail frames that extend between the construction frames. The construction frames have three posts connected together by crossbars, in which the front post is shorter than the other two. The handrail frames are attached to these short posts. Each handrail frame is built up of two post sections with a handrail and a side plank between them. The post sections form half of a lengthwise divided post. The post sections of two adjacent handrail frames thus form one whole post, which can be inserted into the short post of a construction frame. As the post sections are part of the handrail frames, the handrail frames can be easily attached to the short posts already present at the front of the construction frames.
    Type: Application
    Filed: March 19, 2008
    Publication date: June 10, 2010
    Inventor: Dick Buitendijk
  • Publication number: 20090321185
    Abstract: A bridge module has a floor and two upright side sections, which are hinged to lengthwise edges of the floor. Each hinge is formed by two extrusion pieces that can be pushed into each other, and is made so that the side sections can only be folded towards the floor in a direction towards each other. Each side section is made of one extrusion piece, in which a section of the extrusion piece forms a section of the hinges. The edges of the floor are formed by girders, between which there is a plastic plate. The girders are each formed of one extrusion piece, which forms the other section of the hinges.
    Type: Application
    Filed: July 9, 2009
    Publication date: December 31, 2009
    Inventor: Dick Buitendijk
  • Patent number: 5097225
    Abstract: An amplifier circuit in which a first amplifier (A1) and a second amplifier (A2) are protected against short-circuits by a protection apparatus which includes a first device (M1), a second device (M2), a third device (M3) and a protection device (B). For this purpose the first device and the second device generate four signals (s1, s2, s3, s4) related to an equal number of currents (i1, i2, i3, i4), which currents are related to a first or a second load current in the first amplifier or in the second amplifier. In order to control the protection device (B), the third device generates at least two control signals (r1, r2) related to the signal currents (s1, s2, s3, s4), use being made of the equality of the load currents in the absence of short-circuits.
    Type: Grant
    Filed: July 3, 1990
    Date of Patent: March 17, 1992
    Assignee: U. S. Philips Corporation
    Inventors: Hendrik Boezen, Pieter Buitendijk, Rudolf W. Mathijssen
  • Patent number: 5065113
    Abstract: An input signal (Vin) is applied to a first amplifier (A1) and a second amplifier (A2) via a circuit (M), which amplifiers are both coupled to an output terminal (U) to supply an output voltage (Vuit). For this purpose the circuit (M) generates two mutually complementary signals which are related to the output signal (Vuit) and the maximum signal values corresponding to the individual output signals of the first amplifier (A1) and the second amplifier (A2). The output signal to be supplied (Vuit) consequently dictates which amplifier (A1, A2) is driven into full conduction.
    Type: Grant
    Filed: July 2, 1990
    Date of Patent: November 12, 1991
    Assignee: U.S. Philips Corp.
    Inventors: Hendrik Boezen, Pieter Buitendijk, Rudolf W. Mathijssen
  • Patent number: 5051708
    Abstract: In order to boost the output power of a first amplifier (A1) a second amplifier (A2) can increase the supply voltage difference across the first amplifier (A1). However, variations of the supply voltage difference result in comparatively high distortion. In order to minimize this distortion while maintaining the output power, a signal-follower circuit generates a direct voltage lever which tracks a first output signal of the first amplifier, for which purpose the signal-follower circuit is driven by a third amplifier, which compares the first output signal with a reference signal.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: September 24, 1991
    Assignee: U.S. Philips Corp.
    Inventors: Hendrik Boezen, Pieter Buitendijk, Rudolf W. Mathijssen
  • Patent number: 4894622
    Abstract: An integrated current-mirror arrangement comprises a first and a second transistor whose bases are interconnected and connected to the collector of the first transistor. The transistors are constructed as vertical transistors each having a collector region (23a, 23b) of the first conductivity type, isolated from the substrate (21) of the first conductivity type by an intermediate layer (22) of the second conductivity type. A connection is provided between said intermediate layer (22) and the interconnected bases (29, 30) of the two transistors which improves the high-frequency transfer function between input and output and effectively eliminates the capacitive path for interference signals from the voltage supply line (+V) to the output.
    Type: Grant
    Filed: December 8, 1988
    Date of Patent: January 16, 1990
    Assignee: U.S. Philips Corporation
    Inventor: Pieter Buitendijk
  • Patent number: 4857861
    Abstract: The first (T.sub.1) and the second (T.sub.2) output transistor of an amplifier arrangement are push-pull driven by means of a drive circuit (10) having two transistors (T.sub.11, T.sub.12) which are each loaded by a current source (T.sub.13, T.sub.14). Currents which are a measure of the currents flowing through the first (T.sub.1) and the second (T.sub.2) output transistor are generated by first (20) and second (30) current measuring means. These currents are applied to a control circuit (40) which controls the current intensity of the current sources (T.sub.13, T.sub.14) in such a way that the harmonic mean value of the currents flowing through the first (T.sub.1) and the second (T.sub.2) output transistor is substantially equal to a reference value.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: August 15, 1989
    Assignee: U. S. Philips Corporation
    Inventors: Evert Seevinck, Willem De Jager, Buitendijk
  • Patent number: 4853645
    Abstract: The first (T.sub.1) and the second (T.sub.2) output transistor of an amplifier arrangement are push-pull driven by means of a drive circuit (10) having two transistors (T.sub.11, T.sub.12) which are each loaded by a current source (T.sub.13, T.sub.14). Currents which are a measure of the currents flowing through the first (T.sub.1) and the second (T.sub.2) output transistor are generated by first (20) and second (30) current measuring means. These currents are applied to a negative feedback means (40) which controls the current intensity of the current sources (T.sub.13, T.sub.14) in such a way that the harmonic mean value of the currents flowing through the first (T.sub.1) and the second (T.sub.2) output transistor is substantially equal to a reference value.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: August 1, 1989
    Assignee: U.S. Philips Corporation
    Inventors: Evert Seevinck, Willem De Jager, Pieter Buitendijk