Patents by Inventor David Michael Pietruszynski

David Michael Pietruszynski 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).

  • Optical disk pickup using current mode signal exchanges and systems and methods using the same
    Patent number: 7031236
    Abstract: An optical disk pickup system includes an array of photodiodes 101 for converting photons reflected from an optical disk into a plurality of electrical signals each representing a channel. Driving circuitry 407, 408 drives at least one of the electrical signals as a current across a conductor of a flexible cable 403. A low impedance load 404 converts the electrical signal driven across the conductor as a current into a voltage for further processing.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: April 18, 2006
    Assignee: Cirrus Logic, Inc.
    Inventors: David Michael Pietruszynski, Rex Baird
  • Optical disk pickup using current mode signal exchanges and systems and methods using the same
    Publication number: 20040062182
    Abstract: An optical disk pickup system includes an array of photodiodes 101 for converting photons reflected from an optical disk into a plurality of electrical signals each representing a channel. Driving circuitry 407, 408 drives at least one of the electrical signals as a current across a conductor of a flexible cable 403. A low impedance load 404 converts the electrical signal driven across the conductor as a current into a voltage for further processing.
    Type: Application
    Filed: September 18, 2003
    Publication date: April 1, 2004
    Applicant: Cirrus Logic, Inc.
    Inventors: David Michael Pietruszynski, Rex Baird
  • Optical disk pickup using current mode signal exchanges and systems and methods using the same
    Patent number: 6650614
    Abstract: An optical disk pickup system includes an array of photodiodes 101 for converting photons reflected from an optical disk into a plurality of electrical signals each representing a channel. Driving circuitry 407, 408 drives at least one of the electrical signals as a current across a conductor of a flexible cable 403. A low impedance load 404 converts the electrical signal driven across the conductor as a current into a voltage for further processing.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: November 18, 2003
    Assignee: Cirrus Logic, Inc.
    Inventors: David Michael Pietruszynski, Rex Baird
  • Flexible interface signal for use in an optical disk system and systems and methods using the same
    Patent number: 6466528
    Abstract: An interface 400 for interfacing an optical pickup 101 is associated with processing circuitry 100. A plurality of inputs receive data retrieved from an optical disk by the pickup and 401, 402, 403 are each coupled to a corresponding one of the inputs and independently activated and deactivated to selectively pass the data to the processing circuitry.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: October 15, 2002
    Assignee: Cirrus Logic, Inc.
    Inventors: David Michael Pietruszynski, Wesley Ladd Mokry, Yanning Lu
  • Output driver for PCI bus
    Patent number: 5751179
    Abstract: An output driver is provided for operating in a primary power supply environment to drive an output system that can have voltages associated therewith that are higher than the primary power supply level. The driver includes a pull-down N-channel (34) and a pull-up P-channel transistor (44). An output node (40) is driven by the transistor (34) and (44). An N-channel protection device (38) is disposed between node (40) and transistor (34) and an N-channel transistor (48) is disposed between node (40) and transistor (44). Transistor (38) has the gate thereof biased to the primary supply voltage level and the transistor (48) has the gate thereof biased to a voltage slightly above the primary supply voltage level.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: May 12, 1998
    Assignee: Crystal Semiconductor
    Inventors: David Michael Pietruszynski, James Dub Austin, Brian Kirkland