Patents Assigned to Broadcom
  • Patent number: 7843370
    Abstract: In an embodiment, an apparatus and method reduces a calibration settling time in an analog-to-digital converter (ADC). The ADC has a reference voltage supply. The reference voltage supply has an output. A filter capacitor is coupled to the reference voltage supply output. An isolation transistor is series-coupled between the filter capacitor and ground. The isolation transistor isolates the filter capacitor during calibration of the ADC.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: November 30, 2010
    Assignee: Broadcom Corporation
    Inventor: Chun-Ying Chen
  • Patent number: 7843955
    Abstract: A system and method is presented that uses hardware at a central node to determine if bandwidth being provided to a remote node in accordance with an unsolicited grant service (UGS) flow requires adjustment. In one embodiment, the hardware performs this function by comparing information in two consecutively-received UGS extended headers from the same remote device. If the information in the current and previous UGS extended headers differ, then an indication is provided to software of the central node that the bandwidth being provided to the remote node requires adjustment.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: November 30, 2010
    Assignee: Broadcom Corporation
    Inventors: Niki Pantelias, Kenneth G. Zaleski, II, Gale Shallow, Lisa Denney
  • Publication number: 20100296573
    Abstract: Systems and methods for digital upconversion of digital signals are provided. In one embodiment, the system includes a digital frequency adjustment system and a digital to analog conversion system. In a feature of the embodiment, the digital frequency adjustment system consists of set of digital upconversion and upsample elements that shift upwards the frequency of baseband signals. In a further feature of the embodiment, a tree structure of sets of upsample and upconversion elements is used. In another embodiment, the system includes digital and analog frequency adjustment systems in which the frequencies of the input signals are partially upshifted within both the digital and analog domains. Methods for digital upconversion of digital signals are also provided.
    Type: Application
    Filed: August 2, 2010
    Publication date: November 25, 2010
    Applicant: Broadcom Corporation
    Inventors: Ramon A. Gomez, Donald McMullin
  • Publication number: 20100297962
    Abstract: A wireless transceiver includes a programmable antenna, that is configurable to a selected one of a plurality of antenna configurations, based on a control signal. An antenna interface is coupled to the programmable antenna. An RF transceiver section can include at least one power amplifier having a output section that includes a first plurality of tunable inductors that impedance match the output section to the antenna interface. The RF transceiver section can further include at least one low noise amplifier having an input section that includes a first plurality of tunable inductors that impedance match the input section to the antenna interface.
    Type: Application
    Filed: May 19, 2009
    Publication date: November 25, 2010
    Applicant: BROADCOM CORPORATION
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20100295126
    Abstract: An apparatus is disclosed to increase a breakdown voltage of a semiconductor device. The semiconductor device includes a first heavily doped region to represent a source region. A second heavily doped region represents a drain region of the semiconductor device. A metal region represents a gate region of the semiconductor device. The semiconductor device includes a gate oxide positioned between the source region and the drain region, below the gate region. The semiconductor device uses a high dielectric constant (high-? dielectric) material.
    Type: Application
    Filed: June 19, 2009
    Publication date: November 25, 2010
    Applicant: Broadcom Corporation
    Inventor: Akira Ito
  • Publication number: 20100297953
    Abstract: A wireless transceiver includes at least one RF transceiver section that generates an outbound RF signal based on outbound data and that generates inbound data based on an inbound RF signal. A configuration controller configures the wireless transceiver, by configuring the wireless transceiver to identify a plurality of communication paths to a remote station, the plurality of communication paths including at least one indirect communication path through at least one intermediate station; configuring the wireless transceiver to communicate with the remote station based on a first path of the plurality of communication paths; and configuring the wireless transceiver to communicate with the remote station based on a second path of the plurality of communication paths.
    Type: Application
    Filed: May 19, 2009
    Publication date: November 25, 2010
    Applicant: BROADCOM CORPORATION
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20100296511
    Abstract: Embodiments herein provide systems and methods of transferring data in a communication system. An embodiment transfers data by assigning a portion of data among groups of channels coupled to a remote node, such assigning being based on the respective flows to which the portion is associated. The portion of data across is at least two channels in the assigned group of channels, and the split portions are transferred substantially simultaneously among the channels to which they are assigned.
    Type: Application
    Filed: July 30, 2010
    Publication date: November 25, 2010
    Applicant: Broadcom Corporation
    Inventors: Richard S. Prodan, Joel Danzig, Thomas J. Quigley, Niki R. Pantelias
  • Publication number: 20100295125
    Abstract: An apparatus is disclosed to increase a breakdown voltage of a semiconductor device. The semiconductor device includes a first heavily doped region to represent a source region. A second heavily doped region represents a drain region of the semiconductor device. A third heavily doped region represents a gate region of the semiconductor device. The semiconductor device includes a gate oxide positioned between the source region and the drain region, below the gate region. The semiconductor device uses a split gate oxide architecture to form the gate oxide. The gate oxide includes a first gate oxide having a first thickness and a second gate oxide having a second thickness.
    Type: Application
    Filed: June 19, 2009
    Publication date: November 25, 2010
    Applicant: Broadcom Corporation
    Inventor: Akira Ito
  • Publication number: 20100295598
    Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.
    Type: Application
    Filed: May 18, 2010
    Publication date: November 25, 2010
    Applicant: BROADCOM CORPORATION
    Inventors: Hooman Darabi, Ahmadreza Rofougaran, Maryam Rofougaran
  • Publication number: 20100297947
    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.
    Type: Application
    Filed: May 19, 2009
    Publication date: November 25, 2010
    Applicant: BROADCOM CORPORATION
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20100297957
    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. 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.
    Type: Application
    Filed: May 19, 2009
    Publication date: November 25, 2010
    Applicant: BROADCOM CORPORATION
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20100297952
    Abstract: An antenna includes a planar antenna section. A resonator grid includes a plurality of resonators in a planar array to electromagnetically enhance the performance of the plan antenna section.
    Type: Application
    Filed: May 19, 2009
    Publication date: November 25, 2010
    Applicant: BROADCOM CORPORATION
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 7839842
    Abstract: Various aspects of a method and a system for a range reduction scheme for user selection in a multiuser MIMO downlink transmission are presented. Aspects of a system for range reduction may comprise a range reduction processor that determines a plurality of channel measurements corresponding to a plurality of signals. The range reduction processor may compute a plurality of channel capacities based on the channel measurements corresponding to a subset of the plurality of signals having channel gain that is greater than a remaining portion of the plurality of signals. Aspects of a method may comprise determining a plurality of channel measurements corresponding to a plurality of signals, and computing a plurality of channel capacities based on said channel measurements corresponding to a subset of the plurality of signals having a channel gain that is greater than a remaining portion of the plurality of signals.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: November 23, 2010
    Assignee: Broadcom Corporation
    Inventors: Chengjin Zhang, Jun Zheng, Vinko Erceg, Severine Catreux-Erceg, Pieter Roux, Pieter van Rooyen
  • Patent number: 7839785
    Abstract: A method and system for dropping lower priority packets for transmission over a communication medium is provided. A cable modem termination system receives one or more packets to be transferred to one or more data providers, each packet having a priority. Then, based on the priority, a media access controller stores each of the packets in one or more priority queues in a fixed shared memory space in such a way as to maintain the order in which the packets were received in each of the priority queues. The media access controller monitors the number of packets in each of the priority queues and signals an interrupt when a packet threshold is exceeded in one or more of the priority queues. The media access controller then drops lower priority packets in the fixed shared memory space based on the order received to guarantee that there is enough memory to store higher priority packets in the fixed shared memory space.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: November 23, 2010
    Assignee: Broadcom Corporation
    Inventors: Shane Lansing, Niki Pantelias, Young Vu, Francisco J Gomez
  • Patent number: 7839334
    Abstract: An integrated circuit (IC) includes a package substrate, a die, and an antenna structure. The die includes a functional circuit module and a radio frequency (RF) transceiver that processes inbound and outbound RF signals. The antenna structure is coupled to the RF transceiver and is on the die and/or the package substrate. The antenna structure receives the inbound RF signal within a frequency band of approximately 55 GHz to 64 GHz and transmits the outbound RF signal within the frequency band.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: November 23, 2010
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 7840985
    Abstract: A system and method that provide reduced latency in a video signal processing system. Various aspects of the present invention may comprise transmitting a first video information stream representative of a unit of video information. For example, the transmitted first video information stream may correspond to a video channel. A second video information stream representative of the unit of video information may be transmitted simultaneously with the first video information stream. The second video information stream may also, for example, correspond to the video channel. Various aspects of the present invention may comprise receiving a plurality of simultaneously transmitted video information streams. A video information stream of the plurality of received video information streams may be identified that, when processed, is expected to result in the lowest latency in presenting the unit of video information to the user. The identified video information stream may then be so processed.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: November 23, 2010
    Assignee: Broadcom Corporation
    Inventor: Alexander G. MacInnis
  • Patent number: 7840235
    Abstract: Systems and methods that provide channel-adaptive antenna selection in multi-antenna-element communication systems are provided. In one embodiment, a method that selects a subset of receive antennas of a receiver to receive a transmitted RF signal may include, for example, one or more of the following: establishing possible subsets of the receive antennas; determining sets of channel parameter statistics corresponding to the possible subsets of the receive antennas; computing output bit error rates of the receiver, each output bit error rate being computed based on at least one set of channel parameter statistics; selecting a particular possible subset of the receive antennas based upon a criterion predicated on the computed output bit error rates; and connecting one or more RF chains of the receiver to the receive antennas of the selected particular possible subset.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: November 23, 2010
    Assignee: Broadcom Corporation
    Inventors: Severine Catreux-Erceg, Vinko Erceg, Pieter Roux, Pieter Van Rooyen, Jack Winters
  • Patent number: 7839161
    Abstract: According to one general aspect, an apparatus may include a clock channel, a shielding tunnel, and clock repeaters. In various embodiments, the clock channel may be configured to carry the clock signal, and may include a portion of a metal layer of an integrated circuit. In some embodiments, the shielding tunnel may be configured to shield, in at least four directions, the clock channel from other signals, and may include portions of a at least three metal layers of the integrated circuit. The shielding tunnel may be connected to the positive and negative supplies in order to provide the required power for the clock repeaters.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: November 23, 2010
    Assignee: Broadcom Corporation
    Inventor: Afshin Momtaz
  • Patent number: 7839921
    Abstract: A baseband processing module of a Radio Frequency receiver produces time domain equalizer coefficients and calculates a power threshold based upon a total power of a plurality of taps of the time domain equalizer coefficients. The baseband processing module then performs a plurality of iterations, during each of which it identifies at least one minimum power tap and determines a total power figure based upon zeroing the at least one minimum power tap. When the total power figure compares favorably to the power threshold, the baseband processing module modifies the plurality of taps by zeroing the at least one minimum power tap and continuing iterating. When the total power figure compares unfavorably to the power threshold, the baseband processing module ceases iterating without modifying the plurality of taps by zeroing the at least one minimum power tap and then produces modified time domain equalizer coefficients.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: November 23, 2010
    Assignee: Broadcom Corporation
    Inventor: Junqiang Li
  • Patent number: 7839778
    Abstract: The system and method for adaptive flow control transmits pause off packets to network nodes after a calculated time based on switch resource usage thereby alleviating congestion is a network switching system.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: November 23, 2010
    Assignee: Broadcom Corporation
    Inventor: Jiann-Jyh James Lay