Patents Assigned to Broadcom
  • Patent number: 8873576
    Abstract: A switch device that includes a switch pipeline stage to process packet data may selectively clock multiple pipeline sub-stages within the switch pipeline stage. The switch device may provide a first clock to processing logic of a first sub-stage independently of providing a second clock to a processing logic of second sub-stage within the switch pipeline stage. Clocking logic associated with a current switch pipeline stage may receive an event indication, such as an event indication from a previous pipeline stage responsive to processing of packet data by the previous pipeline stage. In response, the clocking logic associated with the current switch pipeline stage may determine a clocking time to issue a clock to a selected pipeline sub-stage in the current switch pipeline stage. The clocking logic may also issue the clock to the selected pipeline sub-stage at the clocking time.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Sachin P. Kadu, John J. Dull
  • Patent number: 8872586
    Abstract: An amplifier with gain boosting is disclosed according to an aspect of the subject technology. The gain boosting may be used to improve the noise figure of the amplifier, and may be achieved by feeding an input signal to the gates of multiple transistors in the amplifier, where each transistor provides a current gain contributing to the total current gain of the amplifier. The amplifier may also include an output driver stage for increasing the driving capability of the amplifier. The amplifier may also include a feedback resistor and an input resistor to obtain a gain with high linearity.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventor: Ming-Hung Hsieh
  • Patent number: 8874034
    Abstract: Aspects of the invention may comprise managing operations of BLE interfaces and/or other radio interfaces in a wireless device to mitigate interference to communication via the BLE interfaces by the other radio interfaces. Operating parameters may be communicated between the BLE interfaces and the other radio interfaces to enable mitigating the interference to the BLE interfaces, and at least some of the BLE interfaces and/or the other radio interfaces may be configured based on the communicated operating parameters. The operating parameters may comprise adaptive frequency hopping (AFH) maps that may be adjusted to prevent use of common and/or used channels. The communication device may detect energy associated with BLE communication via scan of all or some of channels used for BLE communication. BLE communication may be predicted based on monitoring of frequency bands used during BLE communication, and/or monitoring of events that may trigger and/or occur during BLE communication.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: John S. Walley, Brima Babatunde Ibrahim, Steven Hall, Prasanna Desai, Yuan Zhuang
  • Patent number: 8874049
    Abstract: A configurable transceiver may include a configurable receiver, a configurable transmitter, and a digital signal processor (DSP). One or more components of the configurable receiver and/or the configurable transmitter may be a block that includes an array of components, such as an array of amplifiers, an array of filters, etc. The DSP may determine a configuration of the configurable receiver that satisfies a bit error rate threshold and minimizes power consumption. The DSP may configure the blocks of the configurable receiver in accordance with the determined configuration of the configurable receiver. The DSP may receive an indication of a modulation scheme being used for transmitted data and may determine a configuration of the configurable transmitter for the modulation scheme that satisfies an error vector magnitude threshold and minimizes power consumption. The DSP may configure the blocks of the configurable transmitter in accordance with the determined configuration of the configurable transmitter.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8873375
    Abstract: Hypervisor functions, which may control operations of one or more virtual machines, may be distributed across a plurality of network devices. State information may be stored for the virtual machines on network devices for fault tolerance and resilience. The virtual machines may retrieve stored state information to recover from a fault. The hypervisor may control the storage of the state information. Resources of the network devices may be allocated for fault tolerance and resilience of the virtual machines based on network device parameters, which may include storage capacity, processor usage, access time, communication bandwidth, and/or latency. The state information may include program content, cache content, memory content, and/or register content information, may be stored on a continuous, periodic, or an aperiodic basis, and may be shared among the network devices to enable the processing of data by the virtual machines when a fault occurs, and may be incrementally updated.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Yongbum Kim, Bruce Currivan, Wael Diab, Jeyhan Karaoguz, Kenneth Ma, Michael Johas Teener
  • Patent number: 8873659
    Abstract: A system for reduced pair Ethernet transmission. The system includes an interleaver that is operable to receive sets of four code symbols from a physical channel sub-layer (PCS) encoder, wherein each code symbol of each set of four code symbols is associated with one of four channels, and interleave the sets of four code symbols to generate a plurality of interleaved code symbols. The system further includes a serializer that is operable to serialize the plurality of interleaved code symbols to generate a plurality of interleaved and serialized code symbols. The system further includes a transmitter that is operable to transmit the plurality of interleaved and serialized code symbols over an Ethernet medium comprising a single twisted pair of wires.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Peiqing Wang, Linghsiao Wang
  • Patent number: 8874168
    Abstract: A multiple-subscriber identity module (multi-SIM) multi-standby communication device comprises a single SIM card socket that handles multiple SIM cards each with a unique SIM clock signal. SIM identification information is acquired from each SIM card utilizing corresponding SIM clock signals. The SIM clock signals may be generated in response to corresponding SIM card selections and are assigned to corresponding SIM cards, respectively. Each of the assigned SIM clock signals is signaled to the single SIM card socket at a different time instant to establish connections between the multi-SIM multi-standby communication device and each of the multiple SIM cards, respectively. SIM identification information is received from each SIM card. The received SIM identification information is stored within the multi-SIM multi-standby communication device for concurrently communication with corresponding communication networks.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventor: Hui Luo
  • Patent number: 8873606
    Abstract: Methods, systems, and apparatuses are described for reducing the latency in a transceiver. A transceiver includes a high latency communication channel and a low latency communication channel that is configured to be a bypass channel for the high latency communication channel. The low latency communication channel may be utilized when implementing the transceiver is used in low latency applications. By bypassing the high latency communication channel, the high latency that is introduced therein (due to the many stages of de-serialization used to reduce the data rate for digital processing) can be avoided. An increase in data rate is realized when the low latency communication channel is used to pass data. A delay-locked loop (DLL) may be used to phase align the transmitter clock of the transceiver with the receiver clock of the transceiver to compensate for a limited tolerance of phase offset between these clocks.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Heng Zhang, Mehdi Khanpour, Jun Cao, Chang Liu, Afshin Momtaz
  • Patent number: 8874038
    Abstract: A system, method, and apparatus for negotiating a communication link between first and second near field communication (NFC) devices is disclosed. A third NFC device is placed in close proximity with a first host device operatively containing the first NFC device to determine communication information including at least one of a communication mechanism and a data transfer protocol usable by the first host device. The communication information usable by the first host device is stored in a portable device operatively containing the third NFC device. The third NFC device is momentarily placed in close proximity with the second NFC device. The stored communication information of the first host device is transferred from the portable device to a second host device operatively containing the second NFC device.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: John Waters, Brima Ibrahim, Mohamed Awad
  • Patent number: 8875205
    Abstract: A mobile video device includes a transceiver module that receives navigation data corresponding to a plurality of video programs including at least one unicast video program and at least one multicast video program, that transmits selection data and that receives a video signal in response thereto. An interface module receives interface data in response to actions of a user. A video display device generates a selection display based on selection display data in a video selection mode and that generates a video display in a video display mode based on the video signal. A video application module generates the selection display data based on navigation data, that generates selection data based on user interface data.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Thomas J. Quigley, Jeyhan Karaoguz, Sherman (Xuemin) Chen, Michael Dove, David Rosmann, Stephen E. Gordon
  • Patent number: 8873647
    Abstract: Efficient synchronization techniques that support multiple reference clocks in an EQAM device. Consider a plurality of different modulators in the EQAM device receiving data from a corresponding plurality of different sources having corresponding different timing references (i.e., different source reference clocks). To accommodate this, the modulators all operate using a common system clock, and each modulator is provided with a phase synchronizer. The phase synchronizer synchronizes the modulated symbol phases to the corresponding reference clock.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Binfan Liu, Junyi Xu, Weimin Zhang
  • Patent number: 8873691
    Abstract: Disclosed are various embodiments for circuitry that generates a sync code for wireless transmission. The system generates a sync word according to an identifier of the transmitter, the sync word being unique under a cyclic shift of the sync word. The system inserts a plurality of instances of the sync word into a data stream. The system also transmits, via the transmitter, the data stream to a receiver, the receiver being operable to perform a sliding correlation operation on the sync word.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Robert William Hulvey, Hyungjin Kim, Steven Deane Hall, Nicholas Michael Carbone, Siukai Mak
  • Patent number: 8873371
    Abstract: A technique to receive a Multimedia Broadcast Multicast Service (MBMS) broadcast, in which a plurality of source symbols and repair symbols of a broadcast from a broadcast source are received at a User Equipment or User Device (UE). The source symbols and repair symbols are based on fountain codes, so that not all of the repair symbols are used to recover the originally sourced data. An application layer of the UE recovers the sourced data and places the receiver in a power-save mode following the last repair symbol used to recover the sourced data, so that remaining repair symbols are not received by the receiver and subsequently processed.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Soumen Chakraborty, Erik Stauffer
  • Patent number: 8874057
    Abstract: According to one embodiment, a compact low-power receiver comprises a front-end producing a front-end gain and a back-end producing a back-end gain. The front-end includes a transconductance amplifier providing digital gain control and outputting an amplified receive signal, a mixer for generating a down-converted signal from the amplified receive signal, and a transimpedance amplifier (TIA) including a current mode buffer. The TIA provides gain control for amplifying the down-converted signal to produce a front-end output signal. In one embodiment, the back end includes a second-order low-pass filter to produce a filtered signal from the front-end output signal and an analog-to-digital converter (ADC), wherein the filtered signal is fed directly to the ADC without direct-current (DC) offset cancellation being performed. In various embodiments, the front-end gain is substantially greater than the back-end gain.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Mohyee Mikhemar, Hooman Darabi, Masoud Kahrizi
  • Patent number: 8874167
    Abstract: A communication device comprises a single radio resource unit that is shared by a plurality of virtual modems (VMs), each uniquely associated with a single one of a plurality of SIM cards. Traffic related to the SIM cards are concurrently handled utilizing corresponding VMs. Available radio resource in the single radio resource unit are shared by the VMs based on corresponding VM states, namely, an active state, an idle state and a suspended state. VMs in an idle state concurrently monitor paging events and concurrently perform idle mode procedures such as location updating. VMs not related to an intended traffic are suspended. A VM related to the intended traffic is transitioned from an idle state to an active state to enable the communication for the intended traffic. Once the communication is complete, the suspended VMs are resumed to continue idle mode activities.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Xiaoxin Qiu, Yuan Liu, Yaxin Cao, Zhijun Gong, Yongqian Wang, Stephen Richards
  • Patent number: 8874441
    Abstract: Techniques are described herein that suppress noise using multiple sensors (e.g., microphones) of a communication device. Noise modeling (e.g., estimation of noise basis vectors and noise weighting vectors) is performed with respect to a noise signal during operation of a communication device to provide a noise model. The noise model includes noise basis vectors and noise coefficients that represent noise provided by audio sources other than a user of the communication device. Speech modeling (e.g., estimation of speech basis vectors and speech weighting) is performed to provide a speech model. The speech model includes speech basis vectors and speech coefficients that represent speech of the user. A noisy speech signal is processed using the noise basis vectors, the noise coefficients, the speech basis vectors, and the speech coefficients to provide a clean speech signal.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Xianxian Zhang, Jes Thyssen, Kwan Young Shin
  • Patent number: 8874748
    Abstract: A method and system are provided in which a broadband gateway may receive different content from different sources, may combine the content to produce a combined content, and may communicate the combined content to a device connected to the broadband gateway. The content may be automatically and/or manually synchronized. The synchronization may be based on a clock signal received from the device, a clock signal from another device connected to the broadband gateway, and/or a clock signal received through one or more network access service providers. The content may be video image data and/or audio data. Moreover, user-generated content may be received and combined by the broadband gateway when in a peer-to-peer communication configuration with the source of the content. When more than two different content are received, the broadband gateway may be utilized to select which contents to combine.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: David Garrett, Jeyhan Karaoguz, Xuemin Chen, Wael William Diab, David Lundgren, Rich Prodan
  • Patent number: 8874055
    Abstract: Systems and methods according to embodiments of the present invention are provided for increasing the power efficiency of a communications device by allowing it to support dual-SIM functionality while issuing simultaneous wake ups for each SIM. Embodiments of the present invention leverage time sharing solutions to minimize the amount of circuitry needed in a communications device to issue wake ups while avoiding the drawbacks of other time sharing solutions that result in increased overhead due to requiring multiple transitions from an idle state to an active state.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventor: Jin-Sheng Su
  • Patent number: 8873682
    Abstract: A technique to provide hybrid compensation to correct for drifts in a reference frequency output from a digitally-controlled crystal oscillator (DCXO). A first compensation is provided to the DCXO to adjust for overlap or discontinuity of the reference frequency caused by switching capacitors in the capacitor array that controls drift of the reference frequency output. The second compensation is obtained at a phase-locked loop (PLL) that receives the reference frequency signal from the DCXO. The second compensation adjusts the PLL to adjust for variations of the reference frequency that remain after performing compensation in the DCXO.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Rami Mehio, Masoud Kahrizi, Cobus de Beer, Michael Buyanin
  • Patent number: 8872579
    Abstract: Systems and methods are provided for power control. In some implementations, a power control system includes a first transistor having a drain coupled to a first conductor (e.g., first pair of wires of an Ethernet cable), a second transistor having a drain coupled to a second conductor (e.g., second pair of wires of the Ethernet cable), a current sensor coupled to sources of the first and second transistors, and a current management circuit. The current management circuit may detect drain voltages of the first transistor and the second transistor, and adjust gate voltages of the first transistor and the second transistor to keep the drain voltages of the first transistor and the second transistor approximately equal. The current management circuit may detect a current through the current sensor, and adjust the gate voltages of the first transistor and the second transistor to limit the detected current to a current limit.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: October 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Marius Vladan, Sesha Panguluri