Patents Assigned to Broadcom
  • Patent number: 8249097
    Abstract: Aspects of the invention may include two gigabit Ethernet controllers integrated within a single chip and an I/O bridge coupled to the two gigabit Ethernet controllers and integrated within the single chip. The system may further include an I/O function coupled to the I/O bridge that is integrated within the single chip. The I/O function may include I/O logic and an I/O buffer integrated within the single chip and coupled to the I/O bridge and/or the two gigabit Ethernet controllers. A timing function or timing block may also be coupled to the I/O bridge and integrated within the single chip. A host system may be coupled to the I/O bridge. The I/O bridge may further include a primary bus controller, which may be a primary PCI bus controller. The controller or controller block may include control and status registers that may be coupled to the primary bus controller.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventor: Sagar W. Kenkare
  • Patent number: 8248244
    Abstract: A wireless power interface includes first coil, a plurality of coils, and a control module. Each of the plurality of coils has a different orientation with respect to at least one axis of a multi-dimensional axis system. The control module is coupled to enable at least one of the plurality of coils based on electro-magnetic coupling between the first coil and the at least one of the plurality of coils such that power is derived via the electro-magnetic coupling.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8249573
    Abstract: Methods and systems for software definition of a power amplifier for multi-band applications are disclosed and may comprise configuring a single programmable output stage of a transmitter to transmit a signal via one of a plurality of selectively coupled antennas, wherein each antenna handles signals in a different frequency band. A power amplifier within the single programmable output stage may be tuned to a frequency within a range of frequencies handled by the selectively coupled antenna. The tuning may be accomplished by programmably adjusting at least one inductance and capacitance. The antennas may be impedance matched to the power amplifier using transformers and may be activated by at least one integrated transistor. The power amplifier may be biased in a class of operation, which may include Class A, AB, C and F, and may be biased utilizing a digitally-controlled current source and a digitally-controlled voltage source.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8248299
    Abstract: Method and apparatus for processing satellite signals from a first satellite navigation system and a second satellite navigation system is described. In one example, at least one first pseudorange between a satellite signal receiver and at least one satellite of the first satellite navigation system is measured. At least one second pseudorange between the satellite signal receiver and at least one satellite of the second satellite navigation system is measured. A difference between a first time reference frame of the first satellite navigation system and a second time reference frame of the second satellite navigation system is obtained. The at least one first pseudorange and the at least one second pseudorange are combined using the difference in time references.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventor: Frank van Diggelen
  • Patent number: 8249508
    Abstract: A single host device, comprising a plurality of wireless devices, estimates bandwidth requirements such as maximum rates and/or an average data rate expected by each of a plurality of applications to be run on the single host. For each wireless device, available frequencies utilized are determined based on the estimated bandwidth requirements. Each of the plurality of applications is allocated to corresponding one or more wireless devices based on the determined available frequencies so as to, for example, concurrently run corresponding applications on the single host. The determined available frequencies are assigned to corresponding wireless devices based on the estimated bandwidth requirements. The determined available frequencies and the plurality of applications may be reassigned and reallocated, respectively. Each of plurality of applications is allocated to the corresponding one or more wireless devices based on the assigned/reassigned available frequencies and/or the estimated bandwidth requirements.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventor: Asif Grushkevich
  • Patent number: 8248527
    Abstract: A video processor receives an interlaced video comprising source video content and video overlay content. A progressive video of the received interlaced video is used for video overlay detection. The received interlaced video is deinterlaced and converted to a high frame-rate progressive video for display. Video overlay detection and frame based cadence detection are performed independently during frame-rate conversion. Candidate cadences are detected for each video frame. Decisions on final cadences for each video frame are made based on the detected candidate cadences and the detected video overlay content. A frame-rate upconversion is performed according to the final cadence detection decisions. Video frame differences between each video frame and associated adjacent video frames are generated for video overlay detection. Pixel values per line are integrated for each generated video frame difference.
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventor: Min Wang
  • Patent number: 8250432
    Abstract: Variable modulation within combined LDPC (Low Density Parity Check) coding and modulation coding systems. Variable modulation encoding of LDPC coded symbols is presented. In addition, LDPC encoding, that generates an LDPC variable code rate signal, may also be performed as well. The encoding can generate an LDPC variable code rate and/or modulation signal whose code rate and/or modulation may vary as frequently as on a symbol by symbol basis. Some embodiments employ a common constellation shape for all of the symbols of the signal sequence, yet individual symbols may be mapped according different mappings of the commonly shaped constellation; such an embodiment may be viewed as generating a LDPC variable mapped signal. In general, any one or more of the code rate, constellation shape, or mapping of the individual symbols of a signal sequence may vary as frequently as on a symbol by symbol basis.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventors: Ba-Zhong Shen, Hau Thien Tran, Kelly Brian Cameron
  • Patent number: 8249575
    Abstract: A voice data and RF integrated circuit (IC) includes an RF transceiver module that produces received data based on a received RF signal and that produces a transmitted RF signal based on transmit data. A memory module includes a first read only memory (ROM) segment for storing a first plurality of operational instructions, and a first random access memory (RAM) segment for storing a second plurality of operational instructions. A first processing module executes the plurality of operational instructions that include baseband processing to generate input data from the received data, and to produce the transmit data from input data. A first memory interface provides direct downloading of the second plurality of operational instructions from the external memory to the first RAM segment.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventors: Nelson R. Sollenberger, Weidong Li
  • Patent number: 8250499
    Abstract: A system and method for storing power utilization information in an integrated circuit and utilizing such information. Various aspects of the present invention provide an integrated circuit that comprises a first module, which stores power utilization information for at least a portion of the integrated circuit. A second module of the integrated circuit may communicate the power utilization information with an electrical device external to the integrated circuit. Various aspects of the present invention provide a method for storing power utilization information in an integrated circuit. For example, a performance characteristic and/or a power supply characteristic may be monitored as the integrated circuit is utilized. Power utilization information may be determined from the monitored characteristic(s), and the power utilization information may be stored in the integrated circuit.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventors: Chun-ying Chen, Pieter Vorenkamp, Neil Y. Kim, Sumant Ranganathan
  • Patent number: 8248918
    Abstract: A node comprising: an ingress port configured to receive data; a plurality of egress ports configured to transmit data; a routing table configured to provide, at least part of, both a preferred routing path and a recovery routing path; a data tag engine configured to read a tag, associated with the data, that indicates the routing state of the data and, based at least in part upon the tag determine whether to use the preferred routing path or the recovery routing path for a selected path, and determine if the tag is to be modified to indicate a change in the routing status of the data; and a routing engine configured to utilize the selected path to determine the egress port from which to transmit the data.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventors: Jin Ding, Bruce Kwan, Puneet Agarwal
  • Patent number: 8249523
    Abstract: Methods and systems for a multi-port distributed antenna are disclosed and may include configuring one or more amplifiers to communicate signals via one or more ports on a distributed antenna. A characteristic impedance of the distributed antenna at each of the one or more ports may be configured by a location of the one or more ports on the distributed antenna. The amplifiers may be impedance matched to the distributed antenna by coupling each of the amplifiers to the ports based on the characteristic impedance. The amplifiers may include power amplifiers and/or low noise amplifiers. The signals may be time division duplexed. The signals communicated via the ports on the distributed antenna may include RF signals. The distributed antenna may be integrated on a chip with the amplifiers or may be located external to a chip with the amplifiers. The distributed antenna may include a microstrip antenna.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8250362
    Abstract: A premises based multimedia communication system includes a source device that produces multimedia content, a rendering device that presents the multimedia content, and a premises communication network coupling the source device to the rendering device. The system certifies transfer of the multimedia content from the source device to the rendering device via the at least one premises communication network using link layer encryption operations. After certification, the system at least partially disables the link layer encryption operations for the transfer of the multimedia content from the source device to the rendering device via the at least one premises communication network. With the link layer operations are at least partially disabled, the system at least partially enables content layer encryption operations for the transfer of the multimedia content from the source device to the rendering device via the at least one premises communication network.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventors: Sherman (Xuemin) Chen, Stephen Palm, Jeyhan Karaoguz
  • Patent number: 8250251
    Abstract: A method of processing DMA operations includes providing a DMA descriptor, with the DMA descriptor including a reload field therein. The DMA descriptor is then processed, and a location of a next DMA descriptor is identified based upon a condition of the reload field.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventor: Govind Malalur
  • Patent number: 8249067
    Abstract: An apparatus may include a port interface that is arranged and configured to receive a packet from an ingress port, a traffic management module being operatively coupled to the port interface and that is arranged and configured to manage routing of the packet to a destination, and a packet processing engine that is arranged and configured to perform packet processing on the packet and to associate a tag with the packet, where the tag includes a packet processing source field, a destination field, and a fabric source field.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventors: Rupa Budhia, Venkateshwar Buduma, Puneet Agarwal
  • Patent number: 8249651
    Abstract: Analog signal paths are utilized between a baseband processor and a radio front end to support high throughput communications for a multiple in multiple out radio transceiver that support communications over two or more antennas. Specifically, analog differential I and Q path communication signals are exchanged between a radio front end core and a baseband processor to maximize throughput capacity for high data rate signals. Along the same lines, the impedances of traces and the interface are matched to reduce I/Q imbalance.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, Arya Reza Behzad
  • Patent number: 8249650
    Abstract: A method for wireless communication may include, in an RF chip including transmit and receive functions, performing generating a first signal to enable transmission and/or reception of Bluetooth signals. The first signal may be input to a plurality of direct digital frequency synthesizers (DDFSs). The plurality of DDFSs may be clocked via the generated first signal to enable simultaneous transmission and reception of frequency modulated (FM) signals, and to enable transmission and/or reception of near field communication (NFC) signals. The first signal may be generated via a local oscillator generator (LOGEN) to enable the transmission and/or reception of the Bluetooth signals. The first signal may be generated via a phase locked loop (PLL) to enable the transmission and/or reception of the Bluetooth signals.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: August 21, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Publication number: 20120210130
    Abstract: Techniques are provided for users to authenticate themselves to components in a system. The users may securely and efficiently enter credentials into the components. These credentials may be provided to a server in the system with strong authentication that the credentials originate from secure components. The server may then automatically build a network by securely distributing keys to each secure component to which a user presented credentials.
    Type: Application
    Filed: April 23, 2012
    Publication date: August 16, 2012
    Applicant: Broadcom Corporation
    Inventors: Mark Buer, Ed Frank, Nambi Seshadri
  • Publication number: 20120208464
    Abstract: A method includes determining whether information is to be transmitted via a radio frequency (RF) bus that supports direct intra-device communication between at least three circuits in a millimeter wave frequency band. When the information is to be transmitted via the RF bus, the method determines whether the RF bus is available. When the RF bus is available, the information is converted into RF bus signal, access to the RF bus is secured, and after access to the RF bus is secured, the RF bus signal is transmitted via the RF bus.
    Type: Application
    Filed: April 24, 2012
    Publication date: August 16, 2012
    Applicant: BROADCOM CORPORATION
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20120210376
    Abstract: Processing a video stream using upon Program Clock References (PCRs) contained therein in preparation for transmission to a wireless device. Operation includes receiving video frames of the video stream, buffering the video frames, and extracting PCRs from at least some of the video frames of the video stream. Operation further includes, based upon at least the values of the PCRs, determining transmission parameters, and transmitting video frames of the video stream to the wireless device according to the transmission parameters. Operation may further include determining a round trip delay of transmissions to the wireless device and acknowledgements from the wireless device, adjusting PCRs of at least some video frames of the video stream based upon the round trip delay, and transmitting the video frames of the video stream to the wireless device.
    Type: Application
    Filed: April 25, 2012
    Publication date: August 16, 2012
    Applicant: Broadcom Corporation
    Inventors: Thomas J. Quigley, Jeyhan Karaoguz, Sherman (Xuemin) Chen, Michael Dove, David Rosmann, Stephen E. Gordon
  • Publication number: 20120210186
    Abstract: Method and system for data-rate control by randomized bit-puncturing in communication systems. An encoder encodes at least one information bit thereby generating a group of encoded bits or an encoded frame. The encoder may be any type of encoder including a turbo encoder, an LDPC (Low Density Parity Check) encoder, a RS (Reed-Solomon) encoder, or other type of encoder. Any sub-portion of an encoded frame generated by such an encoder can be viewed as being a group of encoded bits. If the encoded frame is sub-divided into multiple groups of bits, each group can under processing in accordance with the means presented herein to effectuate rate matching. Based on a number of bits to be punctured from the group or frame generated by the encoder, a set of pointers and random-generated displacements is used to generate addresses for bits in the group or frame to be transmitted or punctured.
    Type: Application
    Filed: April 26, 2012
    Publication date: August 16, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Uri M. Landau, Mark Kent