Patents Assigned to Broadcom
  • Patent number: 8190388
    Abstract: Aspects of a method and system for detecting Bluetooth signals utilizing a wideband receiver are provided. In this regard, a portion of a frequency band may be scanned multiple times, where each scan comprises receiving signals present in the scanned portion of the frequency band. Based on results of a Fast Fourier Transform performed on the received signals, presence of one or more Bluetooth transmissions in the received signals may be detected. In instances that a Bluetooth transmission is detected, a type of the Bluetooth transmission may be determined based on a number of the scans in which the Bluetooth transmission was detected. In instances that a detected Bluetooth transmission is a page, a Bluetooth transceiver in the wireless communication device may be powered up and/or enter a page scanning mode. The scans may be performed by a wireless local area networking receiver within the wireless communication device.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: May 29, 2012
    Assignee: Broadcom Corporation
    Inventors: Brima Babatunde Ibrahim, Steven Deane Hall
  • Patent number: 8190161
    Abstract: A system and method for utilizing multiple communication pathways for communication hand-off (e.g., in a MIMO system). Various aspects of the present invention may comprise an access point communicating with a communication system utilizing a first number of transceivers. After determining to perform a hand-off of the communication system to a second access point, simultaneously, a second number of communication system transceivers may be utilized to communicate with the first access point and a third number of communication system transceivers may be utilized to communicate with the second access point. Various aspects of the present invention may also comprise an access point initially communicating with a communication system utilizing a first number of transceivers. After determining to hand-off the communication system, the access point may communicate with the communication system utilizing a second number of transceivers that is different from the first number of transceivers.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: May 29, 2012
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, Nambirajan Seshadri, James D. Bennett
  • Patent number: 8190176
    Abstract: A circuit includes a package substrate that supports an on-chip gyrating circuit that generates a motion parameter based on motion of the circuit. The package substrate further supports a die that supports a processing module that processes the motion parameter to produce motion data, wherein the processing module further generates a receive control signal and a transmit control signal in accordance with the motion data. The die further supports a wireless local area network transceiver that generates an outbound RF signal that includes outbound data and that generates voice inbound data from an inbound RF signal, wherein the wireless local area network transceiver is further operable to adjust a receive parameter based on the receive control signal and to adjust a transmit parameter in response to the transmit control signal.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: May 29, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20120126612
    Abstract: An external power supply unit (PSU) for an appliance includes rectification circuitry operable to convert an AC voltage from mains power lines to a DC voltage output, decoupling circuitry operable to decouple a broadband data signal from the mains power lines, timing circuitry operable to provide a signal representative of the mains AC voltage timing, and conveyance circuitry operable to convey the DC voltage output, a ground reference signal, the signal representative of the mains AC voltage timing, and the broadband data signal to the appliance, wherein the conveyance circuitry has no more than four conductors. The timing circuitry may be further operable to modulate the signal representative of the mains AC voltage timing onto either the DC voltage output or the broadband data signal. The timing circuitry may be a zero-crossing detector.
    Type: Application
    Filed: November 18, 2011
    Publication date: May 24, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Jonathan Ephraim David Hurwitz, Iain Barnett
  • Publication number: 20120131358
    Abstract: A primary computing device and a secondary computing device couple with an internal storage component of the primary device powered by, and data accessed by either the first or secondary computing device. The internal storage component includes multiple connectors for connecting internal buses and external buses over which data can be accessed, internally or externally. It includes an internal storage unit (in general, at least one storage unit, and multiple storage units are supported) to which data can be written and from which data can be read. It also includes arbitration and isolation circuitry that makes it possible to access the internal storage unit (for read/write data access, etc.) over one of the buses. The arbitration and an isolation circuitry also facilitates powering the internal storage component employing power supplied by an internal power source, or via an external power source, such as power from an USB connection.
    Type: Application
    Filed: January 31, 2012
    Publication date: May 24, 2012
    Applicant: Broadcom Corporation
    Inventor: James D. Bennett
  • Publication number: 20120128063
    Abstract: A video transmission system includes a transceiver module that transmits a video signal to a remote device over at least one communications channel wherein the video signal is transmitted as at least one separate video layer stream chosen from, an independent video layer stream and at least one dependent video layer streams that require the independent video layer for decoding. A control module determines at least one channel characteristic of the at least one channel and chooses the at least one separate video layer stream based on the at least one channel characteristic of the at least one channel.
    Type: Application
    Filed: January 30, 2012
    Publication date: May 24, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Stephen E. Gordon, Sherman (Xuemin) Chen, Michael Dove, David Rosmann, Thomas J. Quigley, Jeyhan Karaoguz
  • Publication number: 20120127885
    Abstract: A system and method for utilizing multiple independent communication pathways for communication. Various aspects of the present invention may comprise receiving a first signal directly from a first communication network, where the first signal communicates a first representation of a unit of information. A second signal may be received from a second communication network, where the second signal communicates a second representation of the unit of information. The received first and second signals may be processed to determine the first and second representations of the unit of information respectively. An indication of reliability may be determined from the second signal. The indication of reliability and the second representation of the unit of information may be used to re-determine the first representation of the unit of information.
    Type: Application
    Filed: February 2, 2012
    Publication date: May 24, 2012
    Applicant: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, Nambirajan Seshadri, James D. Bennett
  • Publication number: 20120127852
    Abstract: A circuit includes a transceiver coupled to transmit an outbound signal in accordance with a plurality of transmit parameters to at least one remote station and receive an inbound signal from the at least one remote station. The transceiver detects a packet transmission failure, selects one of a plurality of transmission failure causes, and adjusts at least one of a plurality of transmit parameters, based on the selected one of the plurality of transmission failure causes.
    Type: Application
    Filed: January 27, 2012
    Publication date: May 24, 2012
    Applicant: BROADCOM CORPORATION
    Inventor: Mark Gonikberg
  • Publication number: 20120128108
    Abstract: Aspects of a method and system for a sliding window phase estimator for wideband code division multiple access (WCDMA) automatic frequency correction are presented. Aspects of the system may include one or more circuits that enable adjustment of a current demodulation frequency for receiving at least one subsequent symbol based on a computed weighted sum of a plurality of computed frequency error values. Each of the plurality of computed frequency error values may be derived from a current symbol, a corresponding previous symbol, and/or a previous frequency error value. The current symbol may include a current received symbol segment and one or more previously received symbol segments.
    Type: Application
    Filed: November 22, 2011
    Publication date: May 24, 2012
    Applicant: Broadcom Corporation
    Inventors: Hendrik Johannes Conroy, Joseph Boccuzzi
  • Publication number: 20120127962
    Abstract: Systems and methods are disclosed for detecting and mitigating temporary high-level impairments, in a communications channel, and subsequently, mitigating the deleterious effects of the dynamic impairments. The system includes a transmitter and a receiver. The transmitter is adapted to transmit at least one set of modulated signals. The receiver is adapted to receive the at least one set of modulated signals and mitigate temporary high-level impairment in the at least one set of modulated signals using at least one error vector received during the temporary high-level impairment.
    Type: Application
    Filed: January 27, 2012
    Publication date: May 24, 2012
    Applicant: BROADCOM CORPORATION
    Inventor: Thomas J. Kolze
  • Publication number: 20120126396
    Abstract: Methods and apparatuses for a die down device with a thermal connector are provided. In an embodiment, an integrated circuit (IC) device includes an IC die having opposing first and second surfaces, a thermal connector coupled to the first surface of the IC die, and a substrate. The second surface of the IC die is coupled to the substrate. The thermal connector is configured to be coupled to a circuit board.
    Type: Application
    Filed: November 19, 2010
    Publication date: May 24, 2012
    Applicant: Broadcom Corporation
    Inventors: Sam Ziqun Zhao, Rezaur Rahman Khan
  • Publication number: 20120129573
    Abstract: A mobile communication device includes a first wireless transceiver that receives a first inbound RF signal and that transmits a first outbound RF signal based on a first power supply signal. A second wireless transceiver receives a second inbound RF signal and that transmits a second outbound RF signal based on a second power supply signal. A processing module generates at least one power mode signal based on first transmit power control data received via the first inbound RF signal. A power management circuit adjusts a first power consumption parameter of the first power supply signal and a second power consumption parameter of the second power supply signal based on the at least one power mode signal.
    Type: Application
    Filed: January 25, 2012
    Publication date: May 24, 2012
    Applicant: BROADCOM CORPORATION
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20120129533
    Abstract: A method and system supporting handoff of a multimedia call session using background network scanning is disclosed. A mobile multimedia handset may engage in the exchange of a multimedia information stream via a first wireless network, and may sniff a portion of radio frequency spectrum for a second wireless network. Information about available services and network quality of service for the second network may be received by querying the second wireless network or from advertising by the second wireless network. Hand-off between the two networks may be based upon the results of the comparison and one or more user-defined criteria, and the handoff may be synchronized according to predefined events in the stream of multimedia information.
    Type: Application
    Filed: January 26, 2012
    Publication date: May 24, 2012
    Applicant: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, James D. Bennett, Nambirajan Seshadri
  • Publication number: 20120128008
    Abstract: Presented herein are system(s) for demultiplexing, merging, and duplicating packetized elementary stream/program stream/elementary stream data. In one embodiment, there is presented a system for processing data. The system comprises a first circuit and a memory. The first circuit receives transport packets carrying the data. The memory stores data and comprises at least one context. The first circuit maps the data associated with at least one channel to the at least one context.
    Type: Application
    Filed: January 31, 2012
    Publication date: May 24, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Stephane W. Rodgers, Daniel Z. Simon
  • Publication number: 20120129606
    Abstract: A mobile communication device includes a motion sensor for generating motion signals in response to motion of the mobile communication device. A motion data generation module generates motion data based on the motion signals. At least one transceiver sends the motion data to a game device in a gaming mode of operation and transceives wireless telephony data with a wireless telephony network in a telephony mode of operation.
    Type: Application
    Filed: January 30, 2012
    Publication date: May 24, 2012
    Applicant: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Nambirajan Seshadri, Brima B. Ibrahim, John Walley, Jeyhan Karaoguz
  • Patent number: 8184135
    Abstract: Determining pixel behavior type of a pixel or a group of pixels of a LCD and triggering adjustment in drive power of the pixel or the group of pixels based on the pixel behavior type. The pixel behavior type indicates relative motion of areas on the LCD in a video. A pixel behavior determination module is one or combination of a software and a hardware and directs one or more selected pixels of the LCD to be driven relative slower or faster based upon content of video that the selected pixels display. The module independently or in conjunction with another module identifies an active window from a plurality of windows corresponding to a plurality of applications running on the host device and sets the drive power of those pixels that correspond to the active window based on speed of a video displayed on the active window. The module may also adapt LCD drive power on a pixel by pixel basis based upon user input and/or remaining battery life.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: May 22, 2012
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, James D. Bennett
  • Patent number: 8184551
    Abstract: A system and method of throughput-based transmission rate adaptation for wireless transmissions is provided. An adapted transmission rate is determined based on transmission feedback from previous wireless frame transmissions. The adapted transmission rate is determined by comparing nominal throughputs derived from packet success rate (PSR) estimates at the current rate and other rates, such that the adapted transmission rate chosen is one that maximizes the nominal throughput. The PSR estimates can include those associated with the current rate, a fallback rate, and other rates. The PSR estimates are updated after each frame transmission. The PSR estimates can be saved and used for calculating future estimates, and they can also be time-stamped so as not to use them if they are older than a predetermined age.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: May 22, 2012
    Assignee: Broadcom Corporation
    Inventors: Chunyu Hu, George Kondylis, Simeon Furrer
  • Patent number: 8185099
    Abstract: A service aggregator allocates network resources to a plurality of multiservice communication devices capable of communicating via a plurality of networks. The service aggregator includes a communication device interface for facilitating a bidirectional data communication with the plurality of multiservice communication devices via a wireless control channel, the bidirectional data communication including outbound control data sent to at least one of the plurality of multiservice communication devices and inbound control data received from at least one of the plurality of multiservice communication devices, wherein the wireless control channel is separate from the communication between the plurality of multiservice communication devices and the plurality of networks. A network interface receives network resource data from the plurality of networks.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: May 22, 2012
    Assignee: Broadcom Corporation
    Inventors: Vinko Erceg, John Walley, Arya Reza Behzad, David Rosmann, Brima B. Ibrahim, Jeyhan Karaoguz
  • Patent number: 8183680
    Abstract: Methods and apparatus for improved thermal performance and electromagnetic interference (EMI) shielding in integrated circuit (IC) packages are described. A die-up or die-down package includes an IC die, a die attach pad, a heat spreader cap coupled to the die attach pad defining a cavity, and one or more peripheral rows of leads surrounding the die attach pad. The leads do not protrude substantially from the footprint of the encasing structure. The die attach pad and the heat spreader cap defines an encasing structure that substantially encloses the IC die, and shields EMI emanating from and radiating towards the IC die. The encasing structure also dissipates heat generated by the IC die during operation.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: May 22, 2012
    Assignee: Broadcom Corporation
    Inventors: Sam Ziqun Zhao, Rezaur Rahman Khan
  • Patent number: 8183885
    Abstract: In one embodiment, a circuit for providing a tail current for a line driver includes an adjustable current source. The adjustable current source includes a number of current source cells coupled together in a parallel configuration, where the current source cells are configured to provide the tail current for the line driver in response to a digital control signal. The circuit can further include a digital core coupled to the adjustable current source, where the digital core provides the digital control signal. The digital control signal provides a number of bits, where each bit controls one of the current source cells. In one embodiment, a current source cell can comprise a number of current source sub-cells. The current source cells can be configured to provide the tail current for the line driver in response to the digital control signal when the line driver is operating in a class AB mode.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: May 22, 2012
    Assignee: Broadcom Corporation
    Inventors: Joseph Aziz, Andrew Chen, Ark-Chew Wong, Derek Tam