Patents by Inventor Wilhelm Graffenberger

Wilhelm Graffenberger 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).

  • Circuit arrangement having at least two signal paths
    Patent number: 5963081
    Abstract: A circuit arrangement having at least two signal paths which can be alternately enabled by feeding respective controllable current sources and by logic signals selecting one of these controllable current sources, while, at a transition from one signal path to the other, the controllable current sources of the relevant two signal paths are controllable by a time-continuously changing control signal during a transition interval, such that currents which can be supplied by these two controllable current sources change continuously and in opposite directions.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: October 5, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Udo Schillhof, Wilhelm Graffenberger
  • I.sup.2 L gate circuit arrangement having a switchable current source
    Patent number: 4608502
    Abstract: The invention relates to a circuit arrangement having several signal paths which can be activated by a switchable current source. For the current source, use is made of I.sup.2 L gates whose injector connections are combined in two groups. When a switch-over is made from one signal path to another, a decreasing current is applied to the injector connection of the I.sup.2 L gate connected to one signal path while an increasing current is applied to the corresponding connection of the I.sup.2 L gate associated with the other signal path.
    Type: Grant
    Filed: June 14, 1983
    Date of Patent: August 26, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Eise C. Dijkmans, Wilhelm Graffenberger, Ernst A. Kilian
  • Circuit arrangement with electronically controllable transfer characteristic
    Patent number: 4439739
    Abstract: A low-noise bass-control device, which is digitally controllable in a simple manner, comprises an amplifier having an output connected to the series arrangement of a capacitor and a tapped resistor chain. The taps on said resistor chain are connected to an inverting input of the amplifier via a first switch and to the output of the control device via a second switch.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: March 27, 1984
    Assignee: U.S. Philips Corporation
    Inventors: Ernst A. Kilian, Wilhelm Graffenberger, Eise C. Dijkmans, Rudy J. van de Plassche
  • Circuit arrangement for transmitting two signals over one line in opposite directions
    Patent number: 4419752
    Abstract: A circuit for transmitting in opposite directions two pulse-shaped signals via one connecting terminal(K) of a semiconductor body. When one signal is transmitted the signal path for the other signal is inhibited, which is accomplished by means of switching means (1, 2, 3, 4). A possible use of said circuit is one in which, via the same connecting terminal, a synchronizing signal for synchronizing the field deflection in a television receiver is first applied to the semiconductor body and a blanking pulse is produced from said body thereafter.
    Type: Grant
    Filed: July 10, 1981
    Date of Patent: December 6, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Paul Sonnenberger, Wilhelm Graffenberger, Adriaan Cense, Petrus A. M. Van Westen
  • Push-pull amplifier arrangement
    Patent number: 4028630
    Abstract: A push-pull B-stage in IC is arranged with an additional transistor in such a manner that one transistor in the IC and the additional transistor together constitute a new push-pull amplifier while the transistor in the IC is loaded to a higher extent and the other final stage transistor in the IC only serves as a driver for the additional transistor.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: June 7, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Wilhelm Graffenberger, Gerd Onken