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).

  • Patent number: 8406634
    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: Grant
    Filed: July 14, 2011
    Date of Patent: March 26, 2013
    Assignee: Intel Corporation
    Inventors: Jianping Xu, Fabrice Paillet, Tanay Karnik, Donald S. Gardner
  • Publication number: 20130045166
    Abstract: The present invention provides methods of detecting for the presence of a polynucleotide in vivo. These methods are particularly useful for performing identification and/or analysis of samples or specimens in which it is impossible, impractical, or undesirable to move or remove them from their current environment. Methods of practicing the present invention for the purpose of identifying and/or analyzing transgenic plant tissue or cells, in addition to animal tissue or cells and bacterial cells are also provided.
    Type: Application
    Filed: October 15, 2010
    Publication date: February 21, 2013
    Applicant: Monsanto Technology LLC
    Inventors: Ryan K. Bartlett, Allen T. Christian, Mingqi Deng, Sonya J. Franklin, Larry A. Gilbertson, G. David Grothaus, R. Douglas Sammons, Jianping Xu
  • Patent number: 8283771
    Abstract: In some embodiments, provided is an integrated circuit with a first die coupled to a second die. The second die has through-silicon vias disposed through it to provide power references to the first die. The through-silicon vias are laterally re-positionable without inhibiting circuit sections in the second die.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: October 9, 2012
    Assignee: Intel Corporation
    Inventors: Dinesh Somasekhar, Tanay Karnik, Jianping Xu, Yibin Ye
  • Publication number: 20120139433
    Abstract: A circuit for driving a light-emitting diode (LED) light source includes a converter, a saw-tooth signal generator, and a controller. The converter includes a switch which is controlled by a driving signal. The converter provides a sense signal indicating the current through said LED light source. The saw-tooth signal generator generates a saw-tooth signal based on the driving signal. The controller generates the driving signal based on signals including the saw-tooth signal and the first sense signal to adjust the current through the LED light source to a target level and to correct a power factor of the driving circuit by controlling an average current of the input current to be substantially in phase with said input voltage.
    Type: Application
    Filed: February 10, 2012
    Publication date: June 7, 2012
    Applicant: O2MICRO, INC.
    Inventors: Tiesheng YAN, Ching-Chuan KUO, Feng LIN, Jianping XU
  • Publication number: 20120112703
    Abstract: A method for managing a battery with multiple battery cells is disclosed. The method includes monitoring parameters of the battery cells by an information acquisition unit. Parameters of the battery cells include individual cell voltages. The method further includes selecting, by a controller one of multiple charging modes in which the battery cells are charged according to the cell voltages. The charging modes include a constant current charging mode, a constant voltage charging mode, and a pulse charging mode.
    Type: Application
    Filed: June 7, 2011
    Publication date: May 10, 2012
    Applicant: O2 MICRO, INC.
    Inventors: Shungang Xu, Jianping Xu, Shaolan Wang, Wei Zhang, Tao Zhang, Jingbo Ke
  • Publication number: 20120099354
    Abstract: An AC-to-DC converter for converting an AC voltage to a DC voltage includes a first converter, a second converter, a sense circuit, a controller, and an enabling circuit. The first converter converts an AC voltage to a first DC voltage. The second converter converts the first DC voltage to a second DC voltage. The sense circuit coupled to the first and second converters provides a first sense signal indicative of the first DC voltage and a second sense signal indicative of the AC voltage. The controller coupled to the first and second converters controls the first and second DC voltages. The enabling circuit coupled to the sense circuit generates a control signal to the controller to disable both the first converter and the second converter by comparing the first sense signal to a first threshold voltage and comparing the second sense signal to a second threshold voltage.
    Type: Application
    Filed: December 13, 2010
    Publication date: April 26, 2012
    Inventors: Jianlong GAO, Tiesheng YAN, Jianping XU
  • Publication number: 20110268457
    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: July 14, 2011
    Publication date: November 3, 2011
    Inventors: Jianping Xu, Fabrice Paillet, Tanay Karnik, Donald S. Gardner
  • Patent number: 7991302
    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: Grant
    Filed: March 31, 2004
    Date of Patent: August 2, 2011
    Assignee: Intel Corporation
    Inventors: Jianping Xu, Fabrice Paillet, Tanay Karnik, Donald S. Gardner
  • Patent number: 7977911
    Abstract: A power supply system can include a primary power supply coupled to an output, and a secondary power supply coupled to the output. The primary power supply provides power to the output when a voltage level of the secondary power supply is less than a first predetermined level. The secondary power supply provides power to the output when the voltage level of the secondary power supply is greater than the first predetermined level. The secondary power supply not only provides power to the output, but also charges the primary power supply when the voltage level of the secondary power supply is greater than a second predetermined level that is greater than the first predetermined level.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: July 12, 2011
    Assignee: O2 Micro, Inc.
    Inventors: Stefan Maireanu, Alex Hartular, Chun Lu, Jianping Xu, Xinhe Su, Xiaodong Wang
  • Publication number: 20110099672
    Abstract: Transgenic plants are provided comprising a plurality of transgenes comprised in a single locus. In certain aspects, 7 or more transgenes may be expressed from a first locus. Methods are provided for transformation of plant cells with a plurality of transgenes. Also provided are methods for expressing and enhancing the expression of one or more transgenes in a plant.
    Type: Application
    Filed: October 22, 2010
    Publication date: April 28, 2011
    Inventors: Larry Gilbertson, Joson Ward, Jianping Xu, Jon Lamb
  • Publication number: 20110090182
    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: December 23, 2010
    Publication date: April 21, 2011
    Inventor: Jianping Xu
  • Patent number: 7804278
    Abstract: In one embodiment, a battery management system includes a charger controller for controlling a charging current of a battery according to a status of a load which is powered by the battery, and a counter coupled to the charger controller for determining a charging time according to such status. Advantageously, a first charging current is selected when the load is off. A second charging current that is less than the first charging current is selected when the load is on. Furthermore, a frequency of the counter is set to a first frequency when the load is off. The frequency is set to a second frequency that is less than the first frequency when the load is on.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: September 28, 2010
    Assignee: O2Micro International Ltd.
    Inventors: Stefan Maireanu, Chun Lu, Jianping Xu, Xiaohua Lei, Zhitong Lei, Yongqiang Yu
  • Patent number: 7737662
    Abstract: A power system for managing charging, discharging and protection of rechargeable batteries is disclosed. The power system mainly includes a power system. The power system includes a switching circuit coupled to the rechargeable batteries to charge and discharge the rechargeable batteries. The power system includes a power management unit to control the switching circuit. The power system includes a temperature sensing circuit to monitor a temperature of the batteries, voltage detectors to monitor voltages of the batteries, and current detectors to monitor a current of the batteries. If an abnormal condition is sensed by the power management unit when the power system is in an operating mode, the power management unit will terminate the operating mode by switching off the switching circuit to protect the batteries and the power system.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: June 15, 2010
    Assignee: O2Micro International Ltd.
    Inventors: Chun Lu, Stefan Maireanu, Luyang Luo, Lin Tang, Mingzhi He, Jianping Xu
  • Publication number: 20100129819
    Abstract: Methods and compositions which can be used to increase the strength and/or probability of forming a binding complex comprising a target molecule and a substrate are disclosed. In one aspect, linking molecules are disclosed which can be used to increase the number of intra-complex binding interactions. Covalent bonds can be introduced to further increase the strength of these binding interactions. Inter-complex cross-linking can be utilized in connection with these methods to further strengthen and stabilize the disclosed binding complexes.
    Type: Application
    Filed: November 4, 2009
    Publication date: May 27, 2010
    Inventors: Celine Hu, Jianping Xu, Hetian Gao, Julie Perkins
  • Patent number: 7712801
    Abstract: A rotary pawl latch has a lock bar that engages with the pawl when the pawl is latched and that moves toward the center of the pawl to release the pawl for unlatching. This lock bar never completely becomes disengaged from the envelope of the pawl. There are cutouts in the pawl which allow the pawl to rotate as the lock bar is actuated.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: May 11, 2010
    Assignee: Southco, Inc.
    Inventors: Jianping Xu, David A. Minnich, Camillo R. Conte, Kevin A. McCloskey, Ryan M. Downey, Martin M. Morrison
  • Publication number: 20090321893
    Abstract: In some embodiments, provided is an integrated circuit with a first die coupled to a second die. The second die has through-silicon vias disposed through it to provide power references to the first die. The through-silicon vias are laterally re-positionable without inhibiting circuit sections in the second die.
    Type: Application
    Filed: June 30, 2008
    Publication date: December 31, 2009
    Inventors: Dinesh Somasekhar, Tanay Karnik, Jianping Xu, Yibin Ye
  • Patent number: 7536107
    Abstract: A laser driver for high speed interconnections may convert a digital signal to a current train of a bias mode to represent logical zero and of a modulation mode to represent logical one. An optical signal thus produced may include an optical offset. An optical receiver may include a photo-detector to receive the optical signal and generate a current signal, which includes a corresponding current offset. A first amplifier stage converts the current signal to a voltage signal and a second amplifier stage generates a digital output from the voltage signal. One or more low-pass filters may be used to filter the digital output and generate a filtered offset signal for a differential amplifier to generate an offset cancellation signal. The offset cancellation signal may be provided to offset cancellation circuitry to remove the current offset from the current signal generated by the photo-detector.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: May 19, 2009
    Assignee: Intel Corporation
    Inventors: Fabrice Paillet, Tanay Karnik, Jianping Xu, Donald S. Gardner
  • Patent number: 7528619
    Abstract: A voltage droop detector captures the very high-frequency noise on the power grid of a load, such as a microprocessor. The droop detector includes twin circuits, one of which receives the voltage from the power grid of the load, the other of which receives a filtered voltage. A 0th droop, as well as 1st droops, 2nd droops, and so on, are captured and stored for subsequent analysis. The circuits sample the voltages frequently enough to ensure that all droop events are captured. Other embodiments are described and claimed.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: May 5, 2009
    Assignee: Intel Corporation
    Inventors: Fabrice Paillet, Tanay Karnik, Jianping Xu, Vivek K. De
  • Patent number: 7505497
    Abstract: One embodiment of a laser driver for high speed interconnections includes a buffered level shifter to shift the input voltage level to an appropriate level. In some embodiments the buffered level shifter may be tuned to provide a desired level shift with impedance matched to the driving load. Another embodiment converts a digital signal to a current train of a bias mode to represent logical zero and of a modulation mode to represent logical one, wherein one or both of the bias mode and modulation mode may be adjusted, for example by a programmable control circuit or by an adaptive control circuit. Some embodiments also provide circuitry for reducing overshoot of the output signal.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: March 17, 2009
    Assignee: Intel Corporation
    Inventors: Jianping Xu, Fabrice Paillet, Tanay Karnik
  • Patent number: 7498694
    Abstract: A power management device for enabling multiply power sources to supply power to a load. The power management device includes a plurality of switches and a control logic. The plurality of switches are coupled to a plurality of power sources respectively and each switch coupled to each power source. The control logic is capable of selecting a set of switches among the plurality of switches to cooperate in a time-divided fashion to allow the power sources to provide power to the load. The set of switches is selected based on an electrical requirement of the load and an electrical condition of each switch.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: March 3, 2009
    Assignee: 02Micro International Ltd.
    Inventors: Luyang Luo, Chun Lu, Jianping Xu, Lin Tang