Abstract: The motherboard comprises a CPU and a memory component; further at least one video data processing chip mounted to the motherboard wherein the video data processing chip is programmable; and further at least one additional memory component provided to store a software that is executable by the video data processing chip.
Abstract: Provided is a method and system for estimating distortion in a communications channel including an adaptive equalizer. The method includes determining one or more adaptive filter coefficients associated with a signal passed through the equalizer. The method also includes estimating un-equalized channel distortion based upon the determined adaptive filter coefficients.
Abstract: Bias circuitry that may be used within a communications or other device includes a first current mirror having first and second transistors with sources coupled to ground and operable to receive a reference current at a drain of first transistor. A second current mirror has first and second transistors with drains coupled to a battery voltage supply. A third current mirror has first and second transistors with drains coupled to sources of the first and second transistors of the second current mirror, respectively. A biasing transistor couples between the second transistor of the first current mirror and the first transistor of the third current mirror and operable to receive a tuning input voltage at its gate. A resistive element coupled between the second transistor of the third current mirror and ground produces a bias voltage produced at a connection of the resistive element and the second transistor of the third current mirror.
Type:
Grant
Filed:
April 27, 2009
Date of Patent:
December 6, 2011
Assignee:
Broadcom Corporation
Inventors:
Ali Afsahi, Arya Reza Behzad, Vijay Ramachandra Reddy
Abstract: An integrated Ethernet PHY/MAC apparatus having a single link partner capability register shared between a PHY and a corresponding MAC, which implements IEEE Standard 302.3, including IEEE Standards 802.3u and 802.3x. Apparatus also includes plural PHYs, each having a corresponding MAC integrably coupled therewith such that an integrated multi-port Ethernet device is realized. A network consists of at least one integrated Ethernet PHY/MAC device having a single link partner capability register.
Abstract: Certain aspects of a method and system for RC-CR quadrature generation with wideband coverage and process compensation may include determining an amplitude mismatch between an in-phase (I) component and a quadrature (Q) component of a signal generated in a radio frequency (RF) transmitter or receiver. A variation in resistance of a quadrature network associated with the I component and Q component may be determined. The determined amplitude mismatch and the determined variation in the resistance of the quadrature network may be compensated by adjusting a resistance of a portion of the quadrature network associated with the I component and a resistance of a portion of the quadrature network associated with the Q component.
Type:
Grant
Filed:
December 29, 2006
Date of Patent:
December 6, 2011
Assignee:
Broadcom Corporation
Inventors:
Qiang Li, Razieh Roufoogaran, Keith Carter, Arya Behzad
Abstract: A device and method support dialup modem access over a wireless local area and/or personal area network such as, for example, an IEEE 802.11a/b/g/n and/or IEEE 802.15.3a network. A representative embodiment permits a user of a conventional Internet web browser application to access a dialup information provider via a switched telephone network, using the wireless network. A terminal adapter comprising a wired network interface and a wireless network interface receives messaging containing dialing information from a user of a personal computer, via the wireless network. The terminal adapter establishes a dialup connection to the information provider, and exchanges information between the personal computer and the information provider via the wired and wireless interfaces.
Abstract: An Internet infrastructure with network devices and end point devices containing service module manager and service modules, that supports packet routing and vectoring based on payload comparison with spatially related templates. The network device that supports packet content analysis on arriving packet, consists of a plurality of packet switched interface circuitries, user interface circuitry, local storage comprising the service module manager software and a plurality of local service modules, and processing circuitry communicatively coupled to each of the packet switched interfaces, local storage and user interface circuit. The processing circuitry executes service module manager and thus analyzes the packet content and applies one or more selected local service module processing using the packet. The service module manager contains, for comparisons, header templates, spatially related payload trigger templates and spatially related payload supplemental templates.
Abstract: A calibration circuit measures the variation in a filter resistor within the analog domain of the envelope path of a polar transmitter and produces a digital value representative of that variation. A digital processor determines a digital control signal from the digital value that is used to compensate, in the digital domain of the envelope path, for the variation in the filter resistor in the analog domain.
Type:
Grant
Filed:
January 2, 2008
Date of Patent:
December 6, 2011
Assignee:
Broadcom Corporation
Inventors:
Alireza Zolfaghari, Hooman Darabi, Henrik T. Jensen
Abstract: A baseband processing module for use within a Radio Frequency (RF) transceiver includes a downlink/uplink interface, TX processing components, a processor, memory, RX processing components, and a turbo decoding module. The RX processing components receive a baseband RX signal from the RF front end, produce a set of IR samples from the baseband RX signal, and transfer the set of IR samples to the memory. The turbo decoding module receives at least one set of IR samples from the memory, forms a turbo code word from the at least one set of IR samples, turbo decodes the turbo code word to produce inbound data, and outputs the inbound data to the downlink/uplink interface. The turbo decoding module performs metric normalization based upon a chosen metric, performs de-rate matching, performs error detection operations, and extracts information from a MAC packet that it produces.
Type:
Grant
Filed:
May 7, 2009
Date of Patent:
December 6, 2011
Assignee:
Broadcom Corporation
Inventors:
Mark David Hahm, Li Fung Chang, Michiel Petrus Lotter
Abstract: Methods and systems for dynamically changing poll timing based on Bluetooth activity are disclosed. Aspects of one method may include determining synchronous Bluetooth activity between a Bluetooth master device and at least one Bluetooth slave device. The synchronous Bluetooth activity may comprise, for example, transmission of packets by the Bluetooth master device via a SCO link and/or a eSCO link. The Bluetooth master device may dynamically adjust a polling period based on the synchronous Bluetooth activity. For example, the polling period may be less when there is synchronous activity than when there is no synchronous activity. The polling periods for when there is synchronous activity and when there is no synchronous activity may be default values. The default polling periods may be changed to different values, for example, by the user.
Abstract: Various example embodiments are disclosed. According to one example embodiment, an integrated circuit may include a mode block, a plurality of data blocks, and a reset node. The mode block may be configured to output a test mode signal, a scan mode signal, and a trigger signal based on a received data input. The plurality of data blocks may each include registers configured to store data, each of the plurality of data blocks being configured to write over at least some of the data stored in their respective registers in response to receiving a write-over instruction. The reset node may be configured to reset the registers based on receiving either a first reset input or a second reset input. The integrated circuit may be configured to enter a test mode, enter a scan mode, and exit the test mode.
Abstract: An antenna configuration controller configures a programmable antenna via a configuration procedure. The configuration procedure includes evaluating first candidate antenna configurations, based on quality data corresponding to each configuration, wherein the quality data includes mode interference data. A selected antenna configuration is identified when the quality data corresponding to the selected antenna configuration compares favorably to a quality threshold. A first proper subset of the first candidate antenna configurations is selected when the quality data corresponding to the first candidate antenna configurations compares unfavorably to the quality threshold; and second candidate antenna configurations are generated, based on the first proper subset.
Abstract: Various aspects of a method and system for transmission control protocol (TCP) traffic smoothing are presented. Traffic smoothing may comprise a method for controlling data transmission in a communications system that further comprises scheduling the timing of transmission of information from a TCP offload engine (TOE) based on a traffic profile. Traffic smoothing may comprise transmitting information from a TOE at a rate that is either greater than, approximately equal to, or less than, the rate at which the information was generated. Some conventional network interface cards (NIC) that utilize TOEs may not provide a mechanism that enables traffic shaping. By not providing a mechanism for traffic shaping, there may be a greater probability of lost packets in the network.
Abstract: According to one general aspect, a distributed threshold adjuster (DTA) may be interspersed between stages of a multistage amplifier to adjust the DC voltage of an input signal. The DTA may include an input signal terminal configured to receive the input signal. The DTA may also include a plurality of current sources configured to produce an adjustment current signal whose amperage is configured to be increased or decreased by fixed steps in order to adjust the DC voltage of the input signal. The DTA may include a control unit configured to selectively turn on or off the individual current sources of the plurality of current sources to select the amperage of the adjustment current signal. The DTA may further include an output terminal configured to produce an output signal, comprising a combination of the input signal and the adjustment current signal, to a stage of a multistage amplifier.
Abstract: A system and method for providing connectivity between mobile devices and access points of a network without redundant solicitation of communication by the mobile device at each access point is described. The method involves receiving a data packet at a first access point in a control group; transmitting the data packet from the first access point to the mobile device; determining if the mobile device acknowledges receipt of the data packet; responsive to determining that the mobile device failed to acknowledge receipt of the data packet, forwarding the data packet to a second access point; and transmitting the data packet from the second access point to the mobile device.
Abstract: In one embodiment of a communications network, the predetermined encoding scheme and symbol constellation configurations are chosen so that the range in channel qualities that the encoding scheme and symbol constellation configurations are designed to be utilized within overlap with each other. This overlapping provides hysteresis, which reduces the frequency with which a subscriber must alter encoding scheme and symbol constellations. Reducing the frequency of changing encoding scheme and/or symbol constellation eliminates the communication overhead associated with these changes and increases throughput by enabling the subscriber to spend more time transmitting data.
Abstract: A method for generating a preamble of a frame for a wide-bandwidth channel wireless communication begins by generating a legacy carrier detect field. The method continues by generating a channel sounding field, wherein the channel sounding field includes a plurality of tones within the wide-bandwidth channel, wherein a first set of the plurality of tones corresponds to tones of a legacy channel sounding field. The method continues by generating a legacy signal field, wherein, in time, the legacy signal field follows the channel sounding field, which follows the legacy carrier detect field.
Type:
Application
Filed:
July 10, 2007
Publication date:
December 1, 2011
Applicant:
Broadcom Corporation, a California Corporation
Inventors:
Christopher J. Hansen, Jason A. Trachewsky, R. Tushar Moorti
Abstract: A method and apparatus is disclosed to restrict access services to a communication device. The services may be restricted based upon hardware characteristics, geographic characteristics, user specifications of the communication device and/or specified rules. The method and apparatus may restrict its service to only specific applications suitable for the environment and the time. Upon a request for a service that is now restricted, the method and apparatus may notify an end user that the service was requested. Further, the method and apparatus may notify an originator of the request that the service is not available and may ask for a short message to be delivered to the end user.
Abstract: Provided are systems and methods for managing distribution of three dimensional visual media to a plurality of displays. For example, there is a content server for managing distribution of three dimensional (3D) visual media to a client over a network, where the client has a display. The content server comprises a server processor configured to determine a plurality of supported 3D modes of the client, enable one the plurality of supported 3D modes, and provide the 3D visual media to the client for presentation on the display of the client.
Abstract: A balun that includes a first conductor, a second conductor, and a third conductor. The first conductor has a first length. The first conductor also has a first end connected to a first balanced power amplifier output port. The second conductor has substantially the same first length. The second conductor also includes a first end connected to a second balanced power amplifier output port and a second end connected to a second end of the first conductor. The third conductor has substantially the same first length. The third conductor has a first end connected to an antenna port and a second end connected to a ground potential.