Patents by Inventor Anant Agarwal

Anant Agarwal 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: 7793074
    Abstract: An apparatus comprises a plurality of processor cores, and an interconnection network to route data among the processor cores based on destination information in the data. The processor cores are configured to forward the data to a final destination if the destination information indicates that a destination processor core has been reached, or to forward the data to other processor cores if the destination information indicates that a destination processor core has not been reached. The final destination is one of a plurality of destinations indicated by the destination information, the destinations including a plurality of portions of the destination processor core.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: September 7, 2010
    Assignee: Tilera Corporation
    Inventors: David Wentzlaff, Anant Agarwal
  • Patent number: 7774579
    Abstract: An integrated circuit comprises a plurality of tiles. Each tile comprises a processor, and a switch including switching circuitry to forward data received over data paths from other tiles to the processor and to switches of other tiles, and to forward data received from the processor to switches of other tiles. The tile is configured to control access to a resource of the tile based on access information associated with the resource.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: August 10, 2010
    Assignee: Tilera Corporation
    Inventors: David Wentzlaff, Anant Agarwal
  • Patent number: 7774553
    Abstract: A multicore processor comprises a plurality of cache memories; a plurality of processor cores, each associated with one of the cache memories; and a plurality of memory interfaces providing memory access paths from the cache memories to a main memory, at least some of the memory interfaces providing access paths to the main memory for multiple of the cache memories. Each of the memory interfaces is associated with a corresponding portion of the main memory, and includes a directory controller for the portion of the main memory.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: August 10, 2010
    Assignee: Tilera Corporation
    Inventors: Anant Agarwal, Ian R. Bratt, Matthew Mattina
  • Patent number: 7734895
    Abstract: An integrated circuit includes a plurality of processor core. Processing instructions in the integrated circuit includes: managing a plurality of sets of processor cores, each set including one or more processor cores assigned to a function associated with executing instructions; and reconfiguring the number of processor cores assigned to at least one of the sets during execution based on characteristics associated with executing the instructions.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: June 8, 2010
    Assignee: Massachusetts Institute of Technology
    Inventors: Anant Agarwal, David Wentzlaff
  • Patent number: 7734894
    Abstract: An integrated circuit comprises a plurality of tiles. Each tile comprises a processor including a storage module, wherein the processor is configured to process multiple streams of instructions, a switch including switching circuitry to forward data received over data paths from other tiles to the processor and to switches of other tiles, and to forward data received from the processor to switches of other tiles, and coupling circuitry configured to couple data resulting from processing an instruction from at least one of the streams of instructions to the storage module and to the switch.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: June 8, 2010
    Assignee: Tilera Corporation
    Inventors: David Wentzlaff, Anant Agarwal
  • Publication number: 20100133550
    Abstract: A silicon carbide-based power device includes a silicon carbide drift layer having a planar surface that forms an off-axis angle with a <0001> direction of less than 8°.
    Type: Application
    Filed: November 20, 2009
    Publication date: June 3, 2010
    Inventors: Qingchun Zhang, Anant Agarwal, Doyle Craig Capell, Albert Burk, Joseph Sumakeris, Michael O'Loughlin
  • Patent number: 7728402
    Abstract: A semiconductor device includes a semiconductor layer having a first conductivity type, a metal contact on the semiconductor layer and forming a Schottky junction with the semiconductor layer, and a semiconductor region in the semiconductor layer. The semiconductor region and the semiconductor layer form a first p-n junction in parallel with the Schottky junction. The first p-n junction is configured to generate a depletion region in the semiconductor layer adjacent the Schottky junction when the Schottky junction is reversed biased to thereby limit reverse leakage current through the Schottky junction. The first p-n junction is further configured such that punch-through of the first p-n junction occurs at a lower voltage than a breakdown voltage of the Schottky junction when the Schottky junction is reverse biased.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: June 1, 2010
    Assignee: Cree, Inc.
    Inventors: Qingchun Zhang, Sei-Hyung Ryu, Anant Agarwal
  • Publication number: 20100090271
    Abstract: A semiconductor device includes a drift layer having a first conductivity type and a body region adjacent the drift layer. The body region has a second conductivity type opposite the first conductivity type and forms a p-n junction with the drift layer. The device further includes a contactor region in the body region and having the first conductivity type, and a shunt channel region extending through the body region from the contactor region to the drift layer. The shunt channel region has the first conductivity type. The device further includes a first terminal in electrical contact with the body region and the contactor region, and a second terminal in electrical contact with the drift layer.
    Type: Application
    Filed: September 16, 2009
    Publication date: April 15, 2010
    Inventors: Allen Hefner, Sei-Hyung Ryu, Anant Agarwal
  • Patent number: 7673164
    Abstract: An integrated circuit includes a plurality of tiles. Each tile includes a processor; a switch including switching circuitry to forward data over data paths from other tiles to the processor and to switches of other tiles; and a timer. At least some tiles include a low power mode of operation in which either the processor or the switch is able to be powered down, and the tile is able to leave the low power mode based at least in part on a value of the timer.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: March 2, 2010
    Assignee: Massachusetts Institute of Technology
    Inventor: Anant Agarwal
  • Publication number: 20090315036
    Abstract: A semiconductor device according to some embodiments includes a semiconductor layer having a first conductivity type and a surface in which an active region of the semiconductor device is defined. A plurality of spaced apart first doped regions are arranged within the active region. The plurality of first doped regions have a second conductivity type that is opposite the first conductivity type, have a first dopant concentration, and define a plurality of exposed portions of the semiconductor layer within the active region. The plurality of first doped regions are arranged as islands in the semiconductor layer. A second doped region in the semiconductor layer has the second conductivity type and has a second dopant concentration that is greater than the first dopant concentration.
    Type: Application
    Filed: June 26, 2009
    Publication date: December 24, 2009
    Inventors: Qingchun Zhang, Sei-Hyung Ryu, Anant Agarwal
  • Patent number: 7636835
    Abstract: An integrated circuit comprises a plurality of tiles. Each tile comprises a processor, and a switch including switching circuitry to forward data received over data paths from other tiles to the processor and to switches of other tiles, and to forward data received from the processor to switches of other tiles. The integrated circuit further comprises one or more interface modules including circuitry to transfer data to and from a device external to the tiles; and a sub-port routing network including circuitry to route data between a port of a switch and a plurality of sub-ports coupled to one or more interface modules.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: December 22, 2009
    Assignee: Tilera Corporation
    Inventors: Carl G. Ramey, David Wentzlaff, Anant Agarwal
  • Patent number: 7635987
    Abstract: An integrated circuit includes a plurality of tiles. Each tile includes a processor, a switch including switching circuitry to forward data over data paths from other tiles to the processor and to switches of other tiles, and reconfigurable logic that includes one or more connections to the switch.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: December 22, 2009
    Assignee: Massachusetts Institute of Technology
    Inventor: Anant Agarwal
  • Patent number: 7622949
    Abstract: An integrated circuit includes a plurality of tiles. Each tile includes a processor, a switch including switching circuitry to forward data over data paths from other tiles to the processor and to switches of other tiles, and a switch memory that stores instruction streams that are able to operate independently for respective output ports of the switch.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: November 24, 2009
    Assignee: Massachusetts Institute of Technology
    Inventor: Anant Agarwal
  • Patent number: 7624248
    Abstract: An integrated circuit comprises a plurality of tiles. Each tile comprises: a processor, a switch including switching circuitry to forward data received over data paths from other tiles to the processor and to switches of other tiles, and to forward data received from the processor to switches of other tiles, according to a switch instruction indicating an input port to which each of multiple output ports of the switch is to be coupled, and a translation lookaside buffer coupled to the switch to translate virtual memory addresses of switch instructions to physical memory addresses of the switch instructions.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: November 24, 2009
    Assignee: Tilera Corporation
    Inventors: David Wentzlaff, Anant Agarwal
  • Patent number: 7620791
    Abstract: An integrated circuit comprises a plurality of tiles. Each tile comprises a processor, and a switch including switching circuitry to forward data received over data paths from other tiles to the processor and to switches of other tiles, and to forward data received from the processor to switches of other tiles. The integrated circuit further includes a plurality of memory interface modules including circuitry to access a respective external memory, each memory interface module coupled to a switch of at least one tile. At least some of the tiles are configured to access an address in an external memory by sending from the switch a packet that includes a physical memory address that includes the external memory address and information identifying the corresponding external memory.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: November 17, 2009
    Assignee: Tilera Corporation
    Inventors: David Wentzlaff, Matthew Mattina, Anant Agarwal
  • Patent number: 7598567
    Abstract: A semiconductor device includes a drift layer having a first conductivity type and a body region adjacent the drift layer. The body region has a second conductivity type opposite the first conductivity type and forms a p-n junction with the drift layer. The device further includes a contactor region in the body region and having the first conductivity type, and a shunt channel region extending through the body region from the contactor region to the drift layer. The shunt channel region has the first conductivity type. The device further includes a first terminal in electrical contact with the body region and the contactor region, and a second terminal in electrical contact with the drift layer.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: October 6, 2009
    Assignee: Cree, Inc.
    Inventors: Allen Hefner, Sei-Hyung Ryu, Anant Agarwal
  • Publication number: 20090233418
    Abstract: Methods of forming a silicon carbide semiconductor device are disclosed. The methods include forming a semiconductor device at a first surface of a silicon carbide substrate having a first thickness, and mounting a carrier substrate to the first surface of the silicon carbide substrate. The carrier substrate provides mechanical support to the silicon carbide substrate. The methods further include thinning the silicon carbide substrate to a thickness less the first thickness, forming a metal layer on the thinned silicon carbide substrate opposite the first surface of the silicon carbide substrate, and locally annealing the metal layer to form an ohmic contact on the thinned silicon carbide substrate opposite the first surface of the silicon carbide substrate. The silicon carbide substrate is singulated to provide a singulated semiconductor device.
    Type: Application
    Filed: May 29, 2009
    Publication date: September 17, 2009
    Inventors: Anant Agarwal, Sei-Hyung Ryu, Matthew Donofrio
  • Patent number: 7577820
    Abstract: An integrated circuit comprises a plurality of tiles. Each tile comprises a processor including a storage module, wherein the processor is configured to process multiple streams of instructions, a switch including switching circuitry to forward data received over data paths from other tiles to the processor and to switches of other tiles, and to forward data received from the processor to switches of other tiles, and coupling circuitry configured to couple data resulting from processing an instruction from at least one of the streams of instructions to the storage module and to the switch.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: August 18, 2009
    Assignee: Tilera Corporation
    Inventors: David Wentzlaff, Anant Agarwal
  • Publication number: 20090189228
    Abstract: The invention is a device for controlling conduction across a semiconductor body with a P type channel layer between active semiconductor regions of the device and the controlling gate contact. The device, often a MOSFET or an IGBT, includes at least one source, well, and drift region. The P type channel layer may be divided into sections, or divided regions, that have been doped to exhibit N type conductivity. By dividing the channel layer into regions of different conductivity, the channel layer allows better control over the threshold voltage that regulates current through the device. Accordingly, one of the divided regions in the channel layer is a threshold voltage regulating region. The threshold-voltage regulating region maintains its original P type conductivity and is available in the transistor for a gate voltage to invert a conductive zone therein. The conductive zone becomes the voltage regulated conductive channel within the device.
    Type: Application
    Filed: January 25, 2008
    Publication date: July 30, 2009
    Inventors: QINGCHUN ZHANG, SARAH HANEY, ANANT AGARWAL
  • Patent number: 7547578
    Abstract: Methods of forming a silicon carbide semiconductor device are disclosed. The methods include forming a semiconductor device at a first surface of a silicon carbide substrate having a first thickness, and mounting a carrier substrate to the first surface of the silicon carbide substrate. The carrier substrate provides mechanical support to the silicon carbide substrate. The methods further include thinning the silicon carbide substrate to a thickness less the first thickness, forming a metal layer on the thinned silicon carbide substrate opposite the first surface of the silicon carbide substrate, and locally annealing the metal layer to form an ohmic contact on the thinned silicon carbide substrate opposite the first surface of the silicon carbide substrate. The silicon carbide substrate is singulated to provide a singulated semiconductor device.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: June 16, 2009
    Assignee: Cree, Inc.
    Inventors: Anant Agarwal, Sei-Hyung Ryu, Matthew Donofrio