Patents by Inventor David Kung

David Kung 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: 20110080209
    Abstract: A circuit to control the slew rate of charging a capacitance using the capacitance is disclosed. An example circuit includes a regulator circuit to regulate a supply voltage during a normal operation mode of the circuit. A capacitance circuit is coupled to the regulator circuit. The regulator circuit is coupled to charge a capacitance between a first node and a second node of the capacitance circuit with a charge current. A slew rate control circuit is coupled to the regulator circuit and the capacitance circuit. The slew rate control circuit sets a slew rate of a voltage between the first and second nodes during a power up mode of the circuit.
    Type: Application
    Filed: October 2, 2009
    Publication date: April 7, 2011
    Applicant: Power Integrations, Inc.
    Inventors: David Kung, Leif Lund
  • Patent number: 7893754
    Abstract: A temperature independent reference circuit includes first and second bipolar transistors with commonly coupled bases. First and second resistors are coupled in series between the emitter of the second bipolar transistor and ground. The first and second resistors have first and second resistance values, R1 and R2, and third and second temperature coefficients, TC3 and TC2, respectively. The resistance values being such that a temperature coefficient of a difference between the base-emitter voltages of the first and second bipolar transistors, TC1, is substantially equal to TC2×(R2/(R1+R2))+TC3×(R1/(R1+R2)), resulting in a reference current flowing through each of the first and second bipolar transistors that is substantially constant over temperature. A third resistor coupled between a node and the collector of the second bipolar transistor has a value such that a reference voltage generated at the node is substantially constant over temperature.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: February 22, 2011
    Assignee: Power Integrations, Inc.
    Inventors: David Kung, Leif Lund
  • Publication number: 20110025278
    Abstract: A circuit to discharge a capacitance between input terminals of a power system is disclosed. An example circuit includes a control circuit coupled to an input of a power system. The control circuit is coupled to detect whether an electrical energy source is coupled to an input of the power system. A switch is also included and is coupled to the control circuit and to the input of the power system. The control circuit is coupled to drive the switch in a first operating mode when the electrical energy source is coupled to the input of the power system. The control circuit is coupled to drive the switch in a second operating mode when the electrical energy source is uncoupled from the input of the power system. A capacitance coupled between input terminals of the input of the power system is discharged through the switch to a threshold voltage in less than a maximum period of time from when the electrical power source is uncoupled from the input terminals of the power system.
    Type: Application
    Filed: July 31, 2009
    Publication date: February 3, 2011
    Applicant: POWER INTEGRATIONS, INC.
    Inventors: Balu Balakrishnan, David Kung, Raymond Kenneth Orr, David Michael Hugh Matthews
  • Publication number: 20100301821
    Abstract: An example controller includes a constant current control circuit and an integrator included in the constant current control circuit. The constant current control circuit is to be coupled to receive an input current sense signal, an input voltage sense signal, and an output voltage sense signal. The control circuit is adapted to regulate an output current of a power supply by generating a control signal to control switching of a switch. The integrator is coupled to integrate the input current sense signal during a switching period of the control signal to generate an integrated signal representative of a charge taken from an input voltage source of the power supply. The constant current control circuit is adapted to control the switching of the switch such that the integrated signal is proportional to a ratio of the output voltage sense signal to the input voltage sense signal.
    Type: Application
    Filed: June 2, 2009
    Publication date: December 2, 2010
    Applicant: Power Integrations, Inc.
    Inventors: David Kung, William M. Polivka
  • Patent number: 7448703
    Abstract: A retaining and adjusting device is provided for displaceable furniture parts, in particular for a leaf that is hinged so that it can pivot horizontally on an item of furniture, e.g. for a leaf of an upper cupboard. The device includes at least one control lever, whose length can be adjusted and which can be hinged on the part, the length of the control level and/or the position of the bearing point of the control lever being adjustable when the furniture part is closed.
    Type: Grant
    Filed: April 11, 2007
    Date of Patent: November 11, 2008
    Assignee: Julius Blum GmbH
    Inventor: David Küng
  • Publication number: 20080172674
    Abstract: A computer readable storage medium includes executable instructions to assess system cache resources, inter-process communication requirements and staging requirements to divide an extract, transform, load (ETL) dataflow task into a plurality of sub-tasks. The sub-tasks are then executed in parallel on distributed resources.
    Type: Application
    Filed: December 7, 2007
    Publication date: July 17, 2008
    Applicant: BUSINESS OBJECTS S.A.
    Inventors: Monfor Yee, Wu Cao, Hui Xu, Anil Kumar Samudrala, Balaji Gadhiraju, Kurinchi Kumaran, David Kung
  • Publication number: 20080042140
    Abstract: A three dimensional (3D) integrated circuit (IC), 3D IC chip and method of fabricating a 3D IC chip. The chip includes multiple layers of circuits, e.g., silicon insulator (SOI) CMOS IC layers, each including circuit elements. The layers may be formed in parallel and one layer attached to another to form a laminated 3D chip.
    Type: Application
    Filed: August 30, 2007
    Publication date: February 21, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPERATION
    Inventors: Syed Alam, Ibrahim Elfadel, Kathryn Guarini, Meikei Ieong, Prabhakar Kudva, David Kung, Mark Lavin, Arifur Rahman
  • Publication number: 20070287224
    Abstract: A three dimensional (3D) integrated circuit (IC), 3D IC chip and method of fabricating a 3D IC chip. The chip includes multiple layers of circuits, e.g., silicon insulator (SOI) CMOS IC layers, each including circuit elements. The layers may be formed in parallel and one layer attached to another to form a laminated 3D chip.
    Type: Application
    Filed: April 19, 2007
    Publication date: December 13, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPERATION
    Inventors: Syed Alam, Ibrahim Elfadel, Kathryn Guarini, Meikei Ieong, Prabhakar Kudva, David Kung, Mark Lavin, Arifur Rahman
  • Publication number: 20070209157
    Abstract: The invention relates to a retaining and adjusting device for displaceable furniture parts, in particular for a leaf that is hinged so that it can pivot horizontally on an item of furniture, e.g. for a leaf of an upper cupboard. Said device comprises at least one control lever, whose length can be adjusted and which can be hinged on the part, the length of the control level and/or the position of the bearing point of the control lever being adjustable when the furniture part is closed.
    Type: Application
    Filed: April 11, 2007
    Publication date: September 13, 2007
    Inventor: David Kung
  • Publication number: 20070028193
    Abstract: An integrated circuit (IC) design, method and program product for reducing IC design power consumption. The IC is organized in circuit rows. Circuit rows may include a low voltage island powered by a low voltage (Vddl) supply and a high voltage island powered by a high voltage (Vddh) supply. Circuit elements including cells, latches and macros are placed with high or low voltage islands to minimize IC power while maintaining overall performance. Level converters may be placed with high voltage circuit elements.
    Type: Application
    Filed: July 27, 2006
    Publication date: February 1, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony Correale, David Kung, Douglass Lamb, Zhigang Pan, Ruchir Puri, David Wallach
  • Publication number: 20060279334
    Abstract: A level converter for interfacing two circuits supplied by different supply voltages, and integrated circuit including the level converter interfacing circuit in two different voltage islands. A first buffer is supplied by a virtual supply and receives an input signal from a lower voltage circuit. The first buffer drives a second buffer, which is supplied by a higher supply voltage. An output from the second buffer switches a supply select to selectively pass the higher supply voltage or a reduced supply voltage to the first buffer.
    Type: Application
    Filed: August 23, 2006
    Publication date: December 14, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony Correale, Rajiv Joshi, David Kung, Zhigang Pan, Ruchir Puri
  • Publication number: 20060198539
    Abstract: A signal transmission mechanism between a wireless microphone and a receiver comprises a receiver, a wireless microphone and a microphone transmitter. A recess is formed on a surface of the receiver, wherein a plurality of electric contact points is disposed within the recess for facilitating an electric contact with either the wireless microphone or the microphone transmitter. The wireless microphone and the microphone transmitter respectively have extended rear ends capable of being coupled with the recess of the receiver and respectively have electric contact points, whereby the electric contact points of the wireless microphone or the microphone transmitter will be in electric contact with a corresponding set of the electric contact points of the receiver for frequency alignment. Since the frequency alignment is achieved through direct contact, the process of alignment will be quick, precise and free from external radio disturbances.
    Type: Application
    Filed: February 23, 2005
    Publication date: September 7, 2006
    Inventor: David Kung
  • Publication number: 20060190899
    Abstract: A method, system and program product are described for generating a clock distribution network on an integrated circuit by determining an allowable placement region for each of a set of clock tree leaf elements in the integrated circuit. This allowable placement region is generated by determining and intersecting a set of sub-regions under different constraints, each of which identifies an area in which the clock tree leaf element is placed to satisfy the respective constraint. Constraints for which sub-regions are determined include timing constraints in the form of slacks and congestion constraints. After allowable placement regions have been determined, the clock tree leaf elements are clustered, and each clock tree leaf element is placed at a location within its allowable placement region which minimizes some cost function for that clustering.
    Type: Application
    Filed: January 28, 2005
    Publication date: August 24, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: William Migatz, Paul Campbell, David Hathaway, David Kung, Ruchir Puri, Louise Trevillyan
  • Publication number: 20060033110
    Abstract: A three dimensional (3D) integrated circuit (IC), 3D IC chip and method of fabricating a 3D IC chip. The chip includes multiple layers of circuits, e.g., silicon insulator (SOI) CMOS IC layers, each including circuit elements. The layers may be formed in parallel and one layer attached to another to form a laminated 3D chip.
    Type: Application
    Filed: August 16, 2004
    Publication date: February 16, 2006
    Inventors: Syed Alam, Ibrahim Elfadel, Kathryn Guarini, Meikei Ieong, Prabhakar Kudva, David Kung, Mark Lavin, Arifur Rahman
  • Publication number: 20050189604
    Abstract: An integrated circuit (IC) including at least one combinational logic path. The combinational logic path includes two types of logic blocks cells that compensate each other for fabrication parameter effects on cell transistors. The two types may be dense cells with field effect transistor (FET) gates on contacted pitch and isolated cells with FET gates on wider than contacted pitch. Dense cell delay changes from the FET gates being printed out of focus are offset by isolated cell delay changes.
    Type: Application
    Filed: February 26, 2004
    Publication date: September 1, 2005
    Inventors: Puneet Gupta, Fook-Luen Heng, David Kung, Daniel Ostapko
  • Publication number: 20050114814
    Abstract: An integrated circuit (IC) design, method and program product for reducing IC design power consumption. The IC is organized in circuit rows. Circuit rows may include a low voltage island powered by a low voltage (Vddl) supply and a high voltage island powered by a high voltage (Vddh) supply. Circuit elements including cells, latches and macros are placed with high or low voltage islands to minimize IC power while maintaining overall performance. Level converters may be placed with high voltage circuit elements.
    Type: Application
    Filed: November 24, 2003
    Publication date: May 26, 2005
    Inventors: Anthony Correale, David Kung, Douglass Lamb, Zhigang Pan, Ruchir Puri, David Wallach
  • Publication number: 20050110519
    Abstract: A level converter for interfacing two circuits supplied by different supply voltages, and integrated circuit including the level converter interfacing circuit in two different voltage islands. A first buffer is supplied by a virtual supply and receives an input signal from a lower voltage circuit. The first buffer drives a second buffer, which is supplied by a higher supply voltage. An output from the second buffer switches a supply select to selectively pass the higher supply voltage or a reduced supply voltage to the first buffer.
    Type: Application
    Filed: November 24, 2003
    Publication date: May 26, 2005
    Inventors: Anthony Correale, Rajiv Joshi, David Kung, Zhigang Pan, Ruchir Puri
  • Publication number: 20050114815
    Abstract: A method and program product for optimizing level converter placement in a multi supply integrated circuit. Each level converter is placed at a minimum power point to minimize net power and transitional delay from a first (low) voltage net source through the level converter and to a second (higher) voltage net sink. Then, inefficient level converters are eliminated. Level converters with fanin cones below a selected minimum cone size are deleted and low voltage sources to the deleted level converter reverted. Higher voltage level circuit elements receiving inputs from multiple level converters are replaced with equivalent low voltage circuit elements. Low voltage buffer driving level converters are both replaced by a single said level converter.
    Type: Application
    Filed: November 24, 2003
    Publication date: May 26, 2005
    Inventors: Anthony Correale, David Kung, Douglass Lamb, Zhigang Pan, Ruchir Puri
  • Publication number: 20050010899
    Abstract: A process and system are provided for representing object interactions, by means of a sequence diagram or the like, wherein the object interactions are recovered from source code written in Java or other object-oriented programming language. Initially, a Method Information Parser determines the respective methods declared inside the source code and extracts their names. A Method Detail Parser then extracts the method calls to other objects within a method, to resolve each complex method call into multiple lines of single method calls. Information derived from the multiple lines of single method calls is then used to generate the sequence diagram.
    Type: Application
    Filed: July 11, 2003
    Publication date: January 13, 2005
    Inventors: David Kung, Manish Jodhani
  • Patent number: D462947
    Type: Grant
    Filed: December 3, 2001
    Date of Patent: September 17, 2002
    Inventor: David Kung