Patents Assigned to Xilinx, Inc.
  • Patent number: 9557795
    Abstract: A multi-processor system with dynamic power optimization for an integrated circuit and methods thereof are described. An input rate control signal is generated responsive to at least one input data stream. An output rate control signal is generated responsive to an output of the plurality of processors. The input rate control signal and the output rate control signal are monitored. The at least one input data stream is partitioned in response to the input rate control signal. The partitioned data is distributed to at least a portion of the plurality of processors. The plurality of processors is operated in a plurality of modes responsive to the monitoring.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: January 31, 2017
    Assignee: XILINX, INC.
    Inventors: Sabih Sabih, Sundararajarao Mohan
  • Patent number: 9558129
    Abstract: A circuit for enabling access to data is described. The circuit comprises a memory device storing data blocks having a first predetermined size; and a direct memory access circuit coupled to the memory device, the direct memory circuit accessing a data payload having a second predetermined size which is greater than the first predetermined size; wherein the direct memory access circuit accesses the data payload in response to a descriptor having a plurality of addresses corresponding to a predetermined number of the data blocks stored in the memory device. A method of enabling the access to data is also disclosed.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: January 31, 2017
    Assignee: XILINX, INC.
    Inventors: Ygal Arbel, James J. Murray, Hyun W. Kwon, Nishit Patel
  • Patent number: 9558528
    Abstract: A method, computing device, and non-transitory computer-readable medium for arbitrating data for channels in a video pipeline. The method includes determining arbitration weights for the channels. The method also includes determining which channels have arbitration weights above a threshold. The method further includes issuing data to the channels with arbitration weights above the threshold. The method also includes decrementing arbitration weights for channels for which data is issued. The method further includes repeating the determining, issuing, and decrementing until no channels have arbitration weights above the threshold.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: January 31, 2017
    Assignee: XILINX, INC.
    Inventors: Alagar Rengarajan, Ravinder Sharma
  • Patent number: 9553592
    Abstract: A circuit for generating a divided clock signal with a configurable phase offset comprises a first latch circuit adapted to receive a clock signal to be divided; a second latch coupled to an output of the first latch circuit and generating a divided output clock signal; and an initialization circuit coupled to the first latch circuit and the second latch circuit, the initialization circuit coupled to receive an initialization signal. The initialization signal determines a phase offset between the divided output clock signal and the clock signal to be divided. A method of generating a divided clock signal is also described.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: January 24, 2017
    Assignee: XILINX, INC.
    Inventors: Aman Sewani, Fu-Tai An, Parag Upadhyaya
  • Publication number: 20170019278
    Abstract: A circuit for generating a modulated signal in a transmitter of an integrated circuit is disclosed. The circuit comprises a transmitter driver circuit having a first current path for receiving a first input signal of a pair of differential input signals and a second current path for receiving a second input signal of the pair of differential input signals, the transmitter driver circuit comprising a tail current path coupled to each of the first current path and the second current path; a first current source coupled between a first reference voltage and ground, wherein a first current of the first current source is proportional to the tail current of the tail current path; a first pull-up current source coupled between the first reference voltage and a first output node of the transmitter driver circuit; and a second pull-up current source coupled between the first reference voltage and a second output node of the transmitter driver circuit.
    Type: Application
    Filed: July 13, 2015
    Publication date: January 19, 2017
    Applicant: Xilinx, Inc.
    Inventors: Vassili Kireev, Yu Liao
  • Patent number: 9547034
    Abstract: An apparatus for a monolithic integrated circuit die is disclosed. In this apparatus, the monolithic integrated circuit die has a plurality of modular die regions. The modular die regions respectively have a plurality of power distribution networks for independently powering each of the modular die regions. Each adjacent pair of the modular die regions is stitched together with a respective plurality of metal lines.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: January 17, 2017
    Assignee: XILINX, INC.
    Inventor: Rafael C. Camarota
  • Patent number: 9548738
    Abstract: In accordance with some embodiments, an electrostatic discharge (ESD) protection circuit for high-voltage power rails includes an RC-triggered clamp having an RC-circuit having a resistor coupled between a first node and a second node, and a capacitor coupled between the second node and a third node. The RC-triggered clamp also has a transistor with a first source/drain, a gate, and a second source/drain, wherein the first source/drain is coupled to the first node, and the second source/drain is coupled to the third node. The RC-triggered clamp also has an inverter, wherein an input of the inverter is coupled to the second node, and an output of the inverter is coupled to the gate of the transistor. The ESD protection circuit also includes one or more forward-biased diodes coupled in series between a supply node and the first node.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: January 17, 2017
    Assignee: XILINX, INC.
    Inventor: James Karp
  • Publication number: 20170012598
    Abstract: An apparatus, and related method, relates generally to viable bandwidth filtering. In such an apparatus, an analysis filter bank has path filters associated with different bandwidths and is configured for filtering and transforming an input signal having a first bandwidth into a first interleaved output. A mask is coupled to the analysis filter bank and configured for masking at least one narrowband time signal of the first interleaved output. A synthesis filter bank is coupled to the mask. The synthesis filter bank is configured for transforming and filtering the masked first interleaved output to generate a second interleaved output for constructing an output signal having a second bandwidth. The second bandwidth is different than the first bandwidth for the variable bandwidth filtering.
    Type: Application
    Filed: July 6, 2015
    Publication date: January 12, 2017
    Applicant: Xilinx, Inc.
    Inventors: Fredric J. Harris, Christopher H. Dick
  • Publication number: 20170012041
    Abstract: An integrated circuit structure includes: a semiconductor substrate; a shallow trench isolation (STI) region in the semiconductor substrate; one or more active devices formed on the semiconductor substrate; and a resistor array having a plurality of resistors disposed above the STI region; wherein the resistor array comprises a portion of one or more interconnect contact layers that are for interconnection to the one or more active devices.
    Type: Application
    Filed: July 7, 2015
    Publication date: January 12, 2017
    Applicant: XILINX, INC.
    Inventors: Nui Chong, Jae-Gyung Ahn, Ping-Chin Yeh, Cheang-Whang Chang
  • Publication number: 20170012596
    Abstract: Disclosed is apparatus and method to filter a signal. In such an apparatus, an outer polyphase filter is configured for receiving an input signal and for channelizing the input signal into outer filtered samples. An outer Inverse Fourier Transform block is coupled to the outer polyphase filter and configured for transforming the outer filtered samples into a coarse multi-path output. An inner polyphase filter is coupled to a path of the coarse multi-path output for receiving information therefrom and configured for generating inner filtered samples of the information obtained from the path. The inner filtered samples are for moving an edge of a passband associated with the outer filtered samples toward a center of the passband.
    Type: Application
    Filed: July 6, 2015
    Publication date: January 12, 2017
    Applicant: Xilinx, Inc.
    Inventors: Fredric J. Harris, Christopher H. Dick
  • Patent number: 9543934
    Abstract: In an approach for determining multiplier values and divisor values for programming frequency multiplier and divider circuits in a clock network, respective requested frequency values and respective tolerance levels relative to the requested frequency values for a plurality of clocked circuit blocks are used. Multiple solution sets are generated, with each solution set including a multiplier value and an associated set of values of divisors, such that resulting actual frequencies satisfy the respective tolerance levels. Respective sets of clocked error values are determined for the plurality of solution sets, with each clocked error value corresponding to a clocked circuit block. Solution-set-error values are determined as a function of the respective sets of clocked error values, and the solution set having the least solution-set-error value is selected and stored.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: January 10, 2017
    Assignee: XILINX, INC.
    Inventors: Somdutt Javre, Pradeep Kumar Mishra, Gangadhar Budde, Siddharth Rele
  • Publication number: 20170005627
    Abstract: An apparatus relates generally to preconditioning an input signal. In this apparatus, a first digital predistortion module and a second digital predistortion module are for receiving the input signal for respectively providing a first predistorted signal and a second predistorted signal. A combiner is for combining the first predistorted signal and the second predistorted signal for providing an output signal. The first digital predistortion module includes a moving mean block for receiving the input signal for providing a moving mean signal. The first digital predistortion module further includes a digital predistorter for receiving the input signal and the moving mean signal for providing the first predistorted signal.
    Type: Application
    Filed: July 2, 2015
    Publication date: January 5, 2017
    Applicant: Xilinx, Inc.
    Inventors: Hongzhi Zhao, Christopher H. Dick
  • Publication number: 20170004031
    Abstract: An apparatus, as well as a method therefor, relates generally to managing reliability of a solid state storage. In such an apparatus, there is a memory controller for providing a code rate. An encoder is for receiving input data and the code rate for providing encoded data. The solid-state storage is for receiving and storing the encoded data. A decoder is for accessing the encoded data stored in the solid-state storage and for receiving the code rate for providing decoded data of the encoded data accessed. The decoded data is provided as soft decisions representing probabilities of the decoded data. The memory controller is for receiving the decoded data for adjusting the code rate responsive to the probabilities of the decoded data.
    Type: Application
    Filed: July 1, 2015
    Publication date: January 5, 2017
    Applicant: Xilinx, Inc.
    Inventor: Christopher H. Dick
  • Patent number: 9537491
    Abstract: Methods and apparatus for generating multiple phase-shifted clock signals from a base clock signal using programmable delays at the leaf level in a clock distribution network are described. One example method for generating and distributing multiple phase-shifted clock signals in a programmable integrated circuit (IC) generally includes generating a base clock signal, routing the base clock signal through a clock distribution network in the programmable IC to a leaf node, and applying one or more programmable delays to the base clock signal received from the leaf node to generate the multiple phase-shifted clock signals.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: January 3, 2017
    Assignee: XILINX, INC.
    Inventors: Ilya K. Ganusov, Benjamin S. Devlin
  • Patent number: 9531351
    Abstract: In an example implementation, a circuit includes first and second latch circuits. A circuit coupled to the first and second latch circuits is configured to provide a first clock signal to the clock input node of the second latch circuit and provide a second clock signal that is an inversion of the first clock signal to the clock input node of the first latch circuit. The circuit includes a first multiplexer having a first input node coupled to a data output node of the first latch circuit, a second input node coupled to a data input node of the first latch circuit, and an output node coupled to a data input node of the second latch circuit. The circuit also includes a second multiplexer having a first input node coupled to the data output node of the first latch circuit and a second input node coupled to a data output node of the second latch circuit.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: December 27, 2016
    Assignee: XILINX, INC.
    Inventors: Benjamin S. Devlin, Ilya K. Ganusov
  • Patent number: 9529946
    Abstract: An integrated circuit can include a processor operable to execute program code and an Intellectual Property (IP) modeling block. The IP modeling block can include a first port through which the IP modeling block receives first modeling data and a second port coupled to the processor through which the first IP modeling block communicates with the processor during emulation. The first IP modeling block also can include a power emulation circuit. The power emulation circuit is configured to consume a variable amount of power as specified by the first modeling data received via the first port.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: December 27, 2016
    Assignee: XILINX, INC.
    Inventors: Paul R. Schumacher, Graham F. Schelle, Patrick Lysaght, Alan M. Frost
  • Patent number: 9530022
    Abstract: In one approach for protecting a design, a plurality of implementations of the design are generated. Each implementation includes an identification function. One of the implementations is selected as a current implementation, and the current implementation is installed on one or more electronic systems. For each electronic system, a method determines whether or not the current implementation is an authorized version on the electronic system from an output value of the identification function. If in the current implementation is not an authorized version on the electronic system, a signal is output indicating that the current implementation is not an authorized version on the electronic system. Periodically, another one of the implementations is selected as a new current implementation, and the new current installation is used for installations on one or more electronic systems.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: December 27, 2016
    Assignee: XILINX, INC.
    Inventors: Jason J. Moore, James B. Anderson, James D. Wesselkamper, Stephen M. Trimberger
  • Patent number: 9529686
    Abstract: In an approach for detecting faults on a bus interconnect that connects a bus master circuit to bus slave circuits, application program code and fault detection program code are concurrently executed by a bus master circuit. The application program code initiates first bus transactions to the bus slave circuits, and the fault detection program code initiates second bus transactions to the bus slave circuits for detection of faults in data channels of the bus interconnect. An error code generator circuit generates error codes from addresses of the first and second bus transactions. The error codes are transmitted with the first and second bus transactions on address channels of the bus interconnect to addressed ones of the bus slave circuits. Respective error code checker circuits coupled between the bus interconnect and the bus slave circuits determine whether or not the addresses of the bus transactions are correct based on the error codes.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: December 27, 2016
    Assignee: XILINX, INC.
    Inventors: Ygal Arbel, Sagheer Ahmad
  • Patent number: 9529957
    Abstract: Placing a circuit design may include partitioning circuit elements of the circuit design into circuit element sets and grouping bins of an integrated circuit into bin sets. The bins include circuit elements of the circuit design from an initial placement. Placing a circuit design also may include determining a dependency connectivity metric for the circuit elements and, using a processor, selectively relocating circuit elements concurrently, for a plurality of iterations, using a cost metric for relocating the circuit elements and using an order of processing the circuit elements determined from the bin sets, the circuit element sets, and the dependency connectivity metrics.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: December 27, 2016
    Assignee: XILINX, INC.
    Inventors: Grigor S. Gasparyan, Xiao Dong, Marvin Tom
  • Patent number: 9525423
    Abstract: A device comprises a semiconductor substrate, a programmable logic device on the semiconductor substrate, a power distribution network comprising at least one voltage regulator on the semiconductor substrate, and a power management bus for communication between the at least one voltage regulator and the programmable logic device. The programmable logic device comprises a processing module configured to perform a diagnostic analysis of the power distribution network.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: December 20, 2016
    Assignee: XILINX, INC.
    Inventor: Austin H. Lesea