Patents by Inventor Jason Zhang

Jason Zhang 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: 20090180304
    Abstract: An integrated circuit that includes a power stage and a driver stage, all stages using III-nitride power devices.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 16, 2009
    Inventors: Hamid Tony Bahramian, Jason Zhang, Michael A. Briere
  • Patent number: 7551738
    Abstract: A copyright protection method and apparatus employ a first protection scheme within a single authorized domain, in which all interfaces are protected with digital rights management system, and employ a second protection scheme for use in inter-domain file transfers. The method and apparatus employ a third protection scheme for external outputs not protected by a digital rights management system.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: June 23, 2009
    Assignee: General Instrument Corporation
    Inventors: Alexander Medvinsky, Petr Peterka, Jiang (Jason) Zhang
  • Publication number: 20090096289
    Abstract: An interposer electrical interface for placing a DC-DC converter in close proximity with an IC powered by the converter, the DC-DC converter including at least one switching node power supply stage, the at least one switching node power supply stage providing regulated power to the IC, the close proximity of the DC-DC converter and IC allowing for high efficiency in provision of the regulated power from the DC-DC converter to the IC, the interposer electrical interface comprising at least one electrical energy storage element.
    Type: Application
    Filed: October 14, 2008
    Publication date: April 16, 2009
    Applicant: INTERNATIONAL RECTIFIER CORPORATION
    Inventors: Michael A. Briere, Hamid Tony Bahramian, Jason Zhang
  • Publication number: 20090051225
    Abstract: A circuit for driving a switching stage including control and sync switches series connected at a switching node, at least one of the control and sync switches being a normal ON depletion mode device, the circuit comprising a gate driver including first and second switching stages for generating gate drive signals for the sync and control switches, respectively, the first switching stage having a first driver output node and the second switching stage having a second driver output node, a signal from the first node driving the sync switch and a signal from the second node driving the control switch and a circuit connected to the first and second switching stages, the circuit including a first circuit providing a first voltage source, the first circuit being coupled to the first switching stage and to the sync switch, a first bias voltage from the first voltage source being switched by the first switching stage, the first switching stage having a first state wherein the sync switch is on, and a second state wh
    Type: Application
    Filed: June 27, 2008
    Publication date: February 26, 2009
    Applicant: INTERNATIONAL RECTIFIER CORPORATION
    Inventors: Bo Yang, Jason Zhang, Michael A. Briere
  • Patent number: 7492138
    Abstract: A method of improving the operation of a synchronous rectifier circuit which includes a switching transistor and synchronous transistor, by providing an operatively effective value of inductance in the current path of the synchronous transistor; which is shared by the control terminal circuit path of the transistor and by selecting a synchronous transistor having a low resistance to a control signal provided at the control terminal, as well as improved synchronous rectifier circuits designed according to the method. When the transistors are MOSFETs, the inductance provided is preferably a purely parasitic common source inductance in the range of about 2 nH to about 3 nH. The synchronous transistor exhibits a low value of gate resistance to facilitate fast energy exchange between the common source inductance and the gate-source capacitance.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: February 17, 2009
    Assignee: International Rectifier Corporation
    Inventors: Jason Zhang, Bo Yang
  • Publication number: 20080298101
    Abstract: A circuit for reducing switching losses in a synchronous rectifier of a switching stage including a high-side control transistor and a low-side synchronous transistor coupled at a switching node, the switching stage receiving an input voltage and providing a controlled output voltage at an output node. The circuit including a first circuit portion for sensing waveshape edges of a first signal at a gate terminal of the low-side synchronous transistor and a first voltage to determine a delay between the waveshape edge of the first signal and the waveshape edge of the first voltage; and a second circuit portion for calibrating the first signal and the first voltage to align the waveshape edge of the first signal and the waveshape edge of the first voltage, with an optional offset to achieve minimal power loss.
    Type: Application
    Filed: June 1, 2007
    Publication date: December 4, 2008
    Applicant: INTERNATIONAL RECTIFIER CORPORATION
    Inventors: Seungbeom Kevin Kim, Todd Vacca, Jason Zhang
  • Publication number: 20080265851
    Abstract: The high side or low side FET of a buck converter, or both, are replaced by plural parallel devices of different threshold voltage and are turned on and off in a sequence which offers the best turn on and turn off characteristics related to high and low threshold voltages. The parallel devices can have the same or different active areas.
    Type: Application
    Filed: April 24, 2008
    Publication date: October 30, 2008
    Inventor: Jason Zhang
  • Publication number: 20080224677
    Abstract: A method of obtaining an optimized dead time for a synchronous switching power supply comprising a control IC and two series-connected switches, comprising packaging the control IC and the series-connected switches in a co-packaged module; providing a dead time delay circuit within the control IC circuit which has variable dead time; testing the switching power supply; varying the dead time in a defined sequence during the step of testing; monitoring a parameter during testing of the switching power supply as the dead time is varied; determining an optimal dead time based upon monitoring the parameter; and setting the dead time at the optimal dead time.
    Type: Application
    Filed: March 13, 2008
    Publication date: September 18, 2008
    Applicant: INTERNATIONAL RECTIFIER CORPORATION
    Inventors: Kevin Kim, Jason Zhang, Todd Vacca
  • Publication number: 20080180083
    Abstract: A power converter driver that is supplied with two different voltages.
    Type: Application
    Filed: December 11, 2007
    Publication date: July 31, 2008
    Applicant: INTERNATIONAL RECTIFIER CORPORATION
    Inventors: Michael A. Briere, Jason Zhang, HamidTony Bahramian
  • Publication number: 20080150099
    Abstract: An article includes a mounting substrate, a passive component site on the mounting substrate, and an active component site on the mounting substrate. The article also includes a fluid flow barrier disposed local to the passive component site and spaced apart from the active component site. The fluid flow barrier can be a recess that resists fluid flow thereinto because of surface tension of the fluid when it meets-the recess edge. The fluid flow barrier can include a boundary that diverts fluid flow due to the angle of the recess edge as the fluid approaches it. An embodiment also includes a packaging system that includes the article and at least one passive component. An embodiment also includes a method of assembling the article or the packaging system.
    Type: Application
    Filed: March 4, 2008
    Publication date: June 26, 2008
    Inventors: Juan Landeros, Jason Zhang, Lejun Wang
  • Publication number: 20080122418
    Abstract: A buck converter circuit is disclosed in which one or both of the control switch and the synchronous switch are III-nitride-based depletion mode. An enhancement mode switch is connected with one or both of the III-nitride based switches and operated to prevent conduction of current by the III-nitride based switch until all biases are established for proper operation.
    Type: Application
    Filed: November 27, 2007
    Publication date: May 29, 2008
    Inventors: Michael A. Briere, Jason Zhang, Bo Yang
  • Publication number: 20080116589
    Abstract: An integrated voltage regulator may be provided on the bottom of a ball grid array processor package. This may be done despite the fact that conventionally integrated voltage regulator chips are too thick to fit in the area normally available between the motherboard and the ball grid array package because that area is defined by solder balls of a necessarily limited height which is conventionally believed to be too small to accommodate the integrated voltage regulator.
    Type: Application
    Filed: November 17, 2006
    Publication date: May 22, 2008
    Inventors: Zong-Fu Li, David England, Bobby Nikjou, Joseph T. Dibene, Hong Xie, Jason Zhang
  • Patent number: 7359211
    Abstract: An article includes a mounting substrate, a passive component site on the mounting substrate, and an active component site on the mounting substrate. The article also includes a fluid flow barrier disposed local to the passive component site and spaced apart from the active component site. The fluid flow barrier can be a recess that resists fluid flow thereinto because of surface tension of the fluid when it meets the recess edge. The fluid flow barrier can include a boundary that diverts fluid flow due to the angle of the recess edge as the fluid approaches it. An embodiment also includes a packaging system that includes the article and at least one passive component. An embodiment also includes a method of assembling the article or the packaging system.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: April 15, 2008
    Assignee: Intel Corporation
    Inventors: Juan Landeros, Jason Zhang, Lejun Wang
  • Publication number: 20070155799
    Abstract: Novel fenicol compounds having useful properties as antibiotic prodrugs, are provided, together with methods of making and using these new compounds.
    Type: Application
    Filed: December 18, 2006
    Publication date: July 5, 2007
    Inventors: Tomasz W. Glinka, Dale Edward Shuster, Chander Shekher Celly, Robert D. Simmons, Jason Zhang
  • Patent number: 7218007
    Abstract: An electronic structure includes an electronic device coupled to a substrate by conductive bumps and ball limiting metallurgy (BLM). Underfill material having filler particles is disposed in a space between the electronic device and the substrate. A weight percentage of the filler particles is at least about 60%. A particle size of at least 90 wt % of the filler particles is less than about 2 ?m and/or the filler particles are coated by an organic coupling agent. Once the underfill material is fully cured, its coefficient of thermal expansion is no more than 30 PPM/° C., and its glass transition temperature is at least 100° C., and its adhesion to a passivation layer of the electronic device, to the substrate and to the electronic device at its edges is such that the electronic structure passes standardized reliability tests without delamination of the ball limiting metallurgy.
    Type: Grant
    Filed: September 28, 2004
    Date of Patent: May 15, 2007
    Assignee: Intel Corporation
    Inventors: Song-Hua Shi, Tian-An Chen, Jason Zhang, Katrina Certeza
  • Publication number: 20060212138
    Abstract: A power control system and method including a plurality of point-of-load regulators (POL) providing corresponding regulated output voltages; a manager for communicating control signals and operational parameters with said point-of load regulators; a digital bus to carry control signals therebetween; and an analog bus to carry operational parameters therebetween. Analog sensing circuits and a mutliplexer on the POL communicate operational parameters to and from the manager via the analog bus and are controlled via the digital bus. The operational parameters include output voltage, output current, over voltage, temperature, amplifier or comparator offset, and amplifier gain. The analog sensing circuits are calibrated by trim registers on the POL under digital control by the manager.
    Type: Application
    Filed: March 17, 2006
    Publication date: September 21, 2006
    Inventor: Jason Zhang
  • Patent number: 7098637
    Abstract: An improved active voltage positioning (AVP) implementation for a power supply for a microprocessor or the like includes an AVP circuit which is separated from the power supply error amplifier by a buffer amplifier having a parallel RC feedback circuit to controllably adjust the transient response. An AVP signal derived from an output load current sensing element provides an input to the buffer amplifier. A second input is provided by power supply reference voltage. A output of the buffer amplifier is connected as an input to the error amplifier to provide the AVP window. This permits separate adjustment of the transient behavior of the error loop and the AVP loop.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: August 29, 2006
    Assignee: International Rectifier Corporation
    Inventors: David Jauregui, Jason Zhang
  • Publication number: 20060175158
    Abstract: The present invention provides novel railway wheel configurations with integrated brake drum dedicated to vehicle frictional braking, along with manufacturing method of the novel wheel and modification schemes for existing railway vehicle components. The novel wheel configurations with integrated brake drum enables increased thermal tolerances to brake shoe thermal input, enhanced resistances to varies thermal damages and reduced hot axial deflection.
    Type: Application
    Filed: January 24, 2005
    Publication date: August 10, 2006
    Inventor: Ming (Jason) Zhang
  • Patent number: 7056917
    Abstract: A medicament for preventive and/or therapeutic treatment of a microbial infection which comprises as an active ingredient a compound represented by the following general formula (I): wherein, R1 and R2 represent hydrogen atom, a halogen atom, hydroxyl group or the like, W1 represents —CH?CH—, —CH2O—, —CH2CH2— or the like; R3 represents hydrogen atom, a halogen atom, hydroxyl group or an amino group; R4 represents hydrogen atom, a group of —OZ0-4R5 (Z0-4 represents an alkylene group, a fluorine-substituted alkylene group or a single bond, and R5 represents a cyclic alkyl group, an aryl group or the like); W2 represents a single bond or —C(R8)?C(R9)— (R8 and R9 represent hydrogen atom, a halogen atom, a lower alkyl group or the like, Q represents an acidic group, but W2 and Q may together form vinylidenethiazolidinedione or an equivalent heterocyclic ring; m and n represent an integer of 0 to 2, and q represents an integer of 0 to 3.
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: June 6, 2006
    Assignees: Daiichi Pharmaceutical Co., Ltd., Trine Pharmaceuticals, Inc.
    Inventors: Kiyoshi Nakayama, Masami Ohtsuka, Haruko Kawato, William Watkins, Jason Zhang, Monica Palme, Aesop Cho
  • Publication number: 20060106034
    Abstract: A medicament for preventive and/or therapeutic treatment of a microbial infection which comprises as an active ingredient a compound represented by the following general formula (I): wherein, R1 and R2 represent hydrogen atom, a halogen atom, hydroxyl group or the like, W1 represents —CH?CH—, —CH2O—, —CH2CH2— or the like; R3 represents hydrogen atom, a halogen atom, hydroxyl group or an amino group; R4 represents hydrogen atom, a group of —OZ0-4R5 (Z0-4 represents an alkylene group, a fluorine-substituted alkylene group or a single bond, and R5 represents a cyclic alkyl group, an aryl group or the like); W2 represents a single bond or —C(R8)?C(R9)?(R8 and R9 represent hydrogen atom, a halogen atom, a lower alkyl group or the like, Q represents an acidic group, but W2 and Q may together form vinylidenethiazolidinedione or an equivalent heterocyclic ring; m and n represent an integer of 0 to 2, and q represents an integer of 0 to 3.
    Type: Application
    Filed: December 29, 2005
    Publication date: May 18, 2006
    Applicants: Daiichi Pharmaceutical Co., Ltd., Trine Pharmaceuticals, Inc.
    Inventors: Kiyoshi Nakayama, Masami Ohtsuka, Haruko Kawato, William Watkins, Jason Zhang, Monica Palme, Aesop Cho