Patents by Inventor Jianping Xu

Jianping Xu 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).

  • Publication number: 20050069070
    Abstract: A system and method for sampling a data stream generates a number of clock signals having equally spaced phases and then samples a data stream using the clock signals. The clock phases are preferably based on a predetermined fraction of a data rate frequency of the data stream, and sampling is performed based on predetermined combinations of the clock signals. While the system and method is suitable for sampling data transmitted for a wide variety of data rates, the system and method is especially well-suited to sampling at data transmitted at high rates, for example, equal to or greater than 20 Gb/s.
    Type: Application
    Filed: September 30, 2003
    Publication date: March 31, 2005
    Inventors: Fabrice Paillet, Tanay Karnik, Jianping Xu
  • Publication number: 20040258419
    Abstract: A method and apparatus for optical signaling. In one embodiment, a laser driver converts a digital voltage sequence to a current signal having a bias mode adjustable by a bias control and a modulation mode adjustable by a modulation control. A laser generates an optical signal responsive to the current signal of the laser driver. In one embodiment, a photo-detector receives an optical signal and generates a single ended current signal. A transimpedance amplifier circuit converts the single ended current signal to a differential voltage signal. A clock recovery circuit generates an aligned clock signal and a sampler circuit uses the aligned clock signal to retrieve a digital voltage sequence.
    Type: Application
    Filed: March 31, 2004
    Publication date: December 23, 2004
    Inventors: Jianping Xu, Fabrice Paillet, Tanay Karnik, Donald S. Gardner
  • Publication number: 20040247266
    Abstract: Connectors, signaling assemblies, circuit boards, and communication systems are disclosed. Some embodiments include signaling media having a plurality of optical and electrical signal conductors.
    Type: Application
    Filed: July 2, 2004
    Publication date: December 9, 2004
    Applicant: Intel Corporation
    Inventors: Tanay Karnik, Jianping Xu
  • Publication number: 20040217373
    Abstract: An integrated circuit die includes optical interconnect ports on a first side and electrical interconnect ports on a second side.
    Type: Application
    Filed: April 30, 2003
    Publication date: November 4, 2004
    Applicant: Intel Corporation
    Inventors: Tanay Karnik, Jianping Xu
  • Publication number: 20040193733
    Abstract: The disclosure describes packet processing techniques that can be used, for example, by a network protocol off-load engine. For example, the techniques may be used in an engine that performs transmission control protocol (TCP) operations for received packets for a host.
    Type: Application
    Filed: September 3, 2002
    Publication date: September 30, 2004
    Inventors: Sriram R. Vangal, Yatin Hoskote, Nitin Y. Borkar, Jianping Xu, Vasantha K. Erraguntla, Shekhar Y. Borkar
  • Publication number: 20040169644
    Abstract: A wireless coordinate input system for a display system includes a stylus that transmits ultrasonic energy to a plurality of ultrasonic receiving stations in a projection plane. In an embodiment, the stylus may include one ultrasonic transmitter used for determination of three-dimensional coordinates of the stylus relative to the projection plane. The stylus may also include a second ultrasonic transmitter controlled by a pressure-activated switch. When the stylus is pressed against the projection plane, the second transmitter turns on and is used for determination of two-dimensional coordinates of the stylus in the projection plane. The stylus may also include a higher frequency burst transmitter used to generate a time reference. One or more of the ultrasonic receiving stations may also include an ultrasonic transmitter for calibration.
    Type: Application
    Filed: March 5, 2004
    Publication date: September 2, 2004
    Applicant: Intel Corporation
    Inventors: Jianping Xu, Stephen H. Hunt
  • Patent number: 6771862
    Abstract: A signaling medium is disclosed. The signaling medium includes several optical media and electrical conductors arranged such that one or more of the electrical conductors are disposed between the optical media. The medium may be shielded, and may included multiple groupings of electrical conductors and optical media. A connector; a signaling assembly, including a signaling medium and connector; a circuit board; and a signal communication system (including multiple circuit boards and one or more signaling media) are also disclosed.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: August 3, 2004
    Assignee: Intel Corporation
    Inventors: Tanay Karnik, Jianping Xu
  • Publication number: 20040125751
    Abstract: The disclosure describes techniques for coordinating operation of multiple network protocol off-load engines (e.g., Transport Control Protocol (TCP) off-load engines).
    Type: Application
    Filed: December 31, 2002
    Publication date: July 1, 2004
    Inventors: Sriram R. Vangal, Yatin Hoskote, Vasantha K. Erraguntla, Jianping Xu
  • Patent number: 6717073
    Abstract: A wireless coordinate input system for a display system includes a stylus that transmits ultrasonic energy to a plurality of ultrasonic receiving stations in a projection plane. The stylus may include one ultrasonic transmitter used for determination of three-dimensional coordinates of the stylus relative to the projection plane. The stylus may also include a second ultrasonic transmitter controlled by a pressure-activated switch. When the stylus is pressed against the projection plane, the second transmitter turns on and is used for determination of two-dimensional coordinates of the stylus in the projection plane. The stylus may also include a higher frequency burst transmitter used to generate a time reference. One or more of the ultrasonic receiving stations may also include an ultrasonic transmitter for calibration.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: April 6, 2004
    Assignee: Intel Corporation
    Inventors: Jianping Xu, Stephen H. Hunt
  • Publication number: 20040044796
    Abstract: In general, in one aspect, the disclosure describes a method for use in tracking received out-of-order packets. Such a method can include receiving at least a portion of a packet that includes data identifying an order within a sequence, and based on the data identifying the order, requesting stored data identifying a set of contiguous previously received out-of-order packets having an ordering within the sequence that borders the received packet.
    Type: Application
    Filed: September 3, 2002
    Publication date: March 4, 2004
    Inventors: Sriram R. Vangal, Yatin Hoskote, Nitin Y. Borkar, Jianping Xu, Vasantha K. Erranguntla, Shekhar Y. Borkar
  • Publication number: 20040042497
    Abstract: In general, in one aspect, the disclosure describes a method for use in packet processing. The method can include receiving at least a portion of at least one packet and, based on the at least a portion of the at least one packet, determining a clock signal to provide to processing logic that processes the at least one packet.
    Type: Application
    Filed: September 3, 2002
    Publication date: March 4, 2004
    Inventors: Sriram R. Vangal, Yatin Hoskote, Nitin Y. Borkar, Jianping Xu, Vasantha K. Erraguntla, Shekhar Y. Borkar
  • Publication number: 20040013432
    Abstract: According to embodiments of the invention described herein, a system and apparatus are described that include a microprocessor that has light-emitting devices formed into it. The light-emitting devices are to emit lightwaves, or optical signals, that may be organized into optical data. An optical fiber, connected directly to the microprocessor, is to accept the light from the light-emitting devices on the microprocessor die and to transmit the optical data to other devices in a system.
    Type: Application
    Filed: July 16, 2002
    Publication date: January 22, 2004
    Inventors: Tanay Karnik, Jianping Xu
  • Publication number: 20030205710
    Abstract: A light-emitting device and optical communication system based on the light-emitting device is disclosed. The light-emitting device is formed in a float-zone substrate. The light-emitting device includes on the substrate lower surface a reflective layer and on the upper surface spaced apart doped regions. The portion of the upper surface between the doped regions is textured and optionally covered with an antireflection coating to enhance light emission. The light-emitting device can operate as a laser or as a light-emitting diode, depending on the reflectivities of the antireflection coating and the reflective layer.
    Type: Application
    Filed: May 6, 2002
    Publication date: November 6, 2003
    Applicant: Intel Corporation
    Inventors: Donald S. Gardner, Tanay Karnik, Jianping Xu, Shekhar Y. Borkar
  • Publication number: 20030099443
    Abstract: A signaling medium is disclosed. The signaling medium includes several optical media and electrical conductors arranged such that one or more of the electrical conductors are disposed between the optical media. The medium may be shielded, and may included multiple groupings of electrical conductors and optical media. A connector; a signaling assembly, including a signaling medium and connector; a circuit board; and a signal communication system (including multiple circuit boards and one or more signaling media) are also disclosed.
    Type: Application
    Filed: November 27, 2001
    Publication date: May 29, 2003
    Applicant: Intel Corporation
    Inventors: Tanay Karnik, Jianping Xu
  • Patent number: 6535206
    Abstract: The invention in one embodiment provides a system and method for determining the position of an ultrasonic pen device, and for providing calculated position information to a computer system. The system of one embodiment comprises a first and second ultrasonic sensor that detect an ultrasonic signal emitted by an ultrasonic pen. The system further includes analog-to-digital converters to digitize the sensed ultrasonic signal and a processor to process the ultrasonic signal and determine the position of the ultrasonic pen. Some embodiments of the invention incorporate an algorithm that comprises calculating a first ultrasonic signal arrival time and calculating a second ultrasonic signal arrival time, and that further comprises using the first and second arrival times in calculating a final ultrasonic signal arrival time.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: March 18, 2003
    Assignee: Intel Corporation
    Inventor: Jianping Xu
  • Publication number: 20020176577
    Abstract: A digital signature collection and authentication system includes an ink pen having an ultrasonic transmitter that transmits ultrasonic energy to a plurality of ultrasonic receivers. A computer triangulates the location of the pen versus time to generate the signature shape, and to generate velocity and acceleration data. The pen also includes a pressure sensitive tip to record pressure applied to the pen tip. The pen also includes a higher frequency burst transmitter useful to generate a time reference, and to transmit the pressure information. The computer packetizes the shape, velocity, acceleration, and pressure data with a time stamp and an IP address or phone number, encrypts the packet and sends it to a host computer for authentication.
    Type: Application
    Filed: May 25, 2001
    Publication date: November 28, 2002
    Applicant: Intel Corporation
    Inventor: Jianping Xu
  • Publication number: 20020084114
    Abstract: c A wireless coordinate input system for a display system includes a stylus that transmits ultrasonic energy to a plurality of ultrasonic receiving stations in a projection plane. The stylus includes one ultrasonic transmitter used for determination of three-dimensional coordinates of the stylus relative to the projection plane. The stylus also includes a second ultrasonic transmitter controlled by a pressure activated switch. When the stylus is pressed against the projection plane, the second transmitter turns on and is used for determination of two-dimensional coordinates of the stylus in the projection plane. The stylus also includes a higher frequency burst transmitter used to generate a time reference. One or more of the ultrasonic receiving stations also includes an ultrasonic transmitter for calibration.
    Type: Application
    Filed: December 29, 2000
    Publication date: July 4, 2002
    Applicant: Intel Corporation
    Inventors: Jianping Xu, Stephen H. Hunt
  • Patent number: 6198004
    Abstract: The invention relates to a process for converting alpha acid and isoalpha acids to tetrahydroisoalpha acid. The process comprises isomerizing an alpha acid to produce isoalpha acid and hydrogenating the isoalpha acid in the presence of a noble metal catalyst wherein, the noble metal catalyst is added incrementally or continuously throughout the hydrogenation step. The invention also relates to tetrahydroisoalpha acids made by the above process.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: March 6, 2001
    Assignee: Haas Hop Products, Inc.
    Inventors: John Paul Maye, Jianping Xu, George Gauthier, Scott W. Weis