Patents Assigned to Broadcom
  • Publication number: 20120093039
    Abstract: A portable computing device includes a radio frequency (RF) wired link, a data wired link, a core module, a plurality of multi-mode RF units, and a plurality of data modules. The core module is operable to communicate control information with one or more of the plurality of multi-mode RF units in a first frequency band via the RF wired link. The core module is further operable to communicate data of a wireless communication with one or more of the plurality of multi-mode RF units in a second frequency band via the RF wired link. The core module is further operable to communicate clock information to the plurality of multi-mode RF units in a third frequency band via the RF wired link.
    Type: Application
    Filed: December 23, 2011
    Publication date: April 19, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Brima B. Ibrahim, Hooman Darabi
  • Publication number: 20120091525
    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: December 28, 2011
    Publication date: April 19, 2012
    Applicant: Broadcom Corporation
    Inventor: Akira Ito
  • Patent number: 8160244
    Abstract: Stateless hardware security modules facilitate securing data transfers between devices in a data communication system. The stateless hardware security module may communicate with other devices via a secure communication channel to securely transfer information between the client device and another device. As a result, sensitive information such as cryptographic keys and data may be securely routed between the client device and another device. The stateless hardware security module may support a limited set of key management operations to facilitate routing of information between the client device and another device. However, the stateless hardware security module does not need to maintain state information for the keys it maintains and/or uses. As a result, the stateless hardware security module may be advantageously integrated into a variety of client devices.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Mark Buer
  • Patent number: 8161092
    Abstract: System and method for processing symbols in a communication system are disclosed and may include in a processor that receives symbols to be coded for transmission over a wireless medium, grouping elements of an input matrix across a second dimension of the input matrix to form groups of matrix elements while multiplying the input matrix and an input vector. The input vector may include the symbols to be coded for transmission over the wireless medium. The method may also include pre-computing possible permutations of partial results for each of the groups of matrix elements, and assigning the partial results from each of the groups of matrix elements to each of a corresponding index of a first dimension of the input matrix to form a matrix of assigned partial results.
    Type: Grant
    Filed: January 21, 2008
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Yung-Hsiang Lee
  • Patent number: 8160525
    Abstract: Aspects of a method and system for compensating for using a transmitter to calibrate a receiver for channel equalization are provided. Various embodiments of the invention may be applicable wireless devices in TDM systems, Bluetooth, and/or WLAN applications, for example. Transmit tones may be generated by a transmitter PLL and the baseband response may be measured for each of the injected tones. The tones may be swept over a frequency range and a corresponding oscillator signal may be mixed with the received signal to determine the response of, for example, the receiver filters. Adjusting any of a plurality of receiver and/or transmitter parameters based on baseband measurements may provide appropriate channel compensation or calibration. Accordingly, the baseband circuitry may generate equalization signals, which may be utilized to adjust receiver and/or transmitter circuitry. This approach may be provide I/Q balancing and transmit filtering calibration after receiver calibration is completed.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8160506
    Abstract: Aspects of a method and system for transmission and/or reception of signals up to EHF utilizing a delay circuit are provided. In this regard, a transceiver may comprise at least one delay circuit which may, in turn, comprise a plurality of delay elements and a variable capacitance. The delay circuit may be enabled to delay a first signal, via at least a portion of the delay elements and via the variable capacitance, to generate a second signal that is 90° phase shifted relative to said first signal. Additionally, the delay circuit may be enabled to mix the first signal with the second signal to generate a third signal that is twice a frequency of the first signal. The third signal may be utilized for up-conversion and/or down-conversion of signals to and/or from baseband, intermediate frequencies, and/or RF frequencies of up to EHF.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8159895
    Abstract: Methods and systems for split threshold voltage programmable bitcells are disclosed and may include selectively programming bitcells in a memory device by applying a high voltage to a gate terminal of the bitcells, where the programming burns a conductive hole in an oxide layer above a higher threshold voltage layer in a memory device. The bitcells may comprise an oxide layer and a doped channel, which may comprise a plurality of different threshold voltage layers. The plurality of different threshold voltage layers may comprise at least one layer with a higher threshold voltage and at least one layer with a lower threshold voltage. The oxide may comprise a gate oxide. The bitcell may comprise an anti-fuse device. The layer with a higher threshold voltage may be separated from an output terminal of the bitcell by the at least one layer with a lower threshold voltage.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Jonathan Schmitt
  • Patent number: 8160097
    Abstract: A mobile communications device includes one or more antennas and a plurality of wireless transceivers that are each configured to transmit and receive transmissions via the one or more antennas according to at least one of several associated communications protocols. The device includes a control processor operatively coupled to the transceivers and antenna(s), which is configured to select and utilize one or more of the wireless transceivers and associated communications protocols in order to transact particular transmissions, where the selection is based on characteristics of the particular transmissions, and to allocate bandwidth to multiple transmissions within a single communications protocol, where the allocation is based on characteristics of the transmissions. The device also includes a power source coupled to the transceivers and adapted to supply power to the transceivers.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Kevin Cadieux
  • Patent number: 8161217
    Abstract: Methods and systems for a RFIC master are disclosed. Aspects of one method may include configuring an on-chip programmable device that may function as a master on a bus that has at least one device interface, for example, RFIC interface, coupled to the bus. The on-chip programmable device may generate at least one signal to control at least one device coupled to at least one device interface. The on-chip programmable device may communicate the generated signal via the bus upon receiving an input timer signal and may be configured by writing at least one event data and an index-sample data to the on-chip programmable device. The index-sample data may comprise at least a count value and an event data index. When the count value equals a value of the timer signal, event data may be fetched and executed starting with the one specified by the event data index.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventors: Frederic Hayem, Andrew du Preez, Louis Botha, Johan (Hendrik) Conroy
  • Patent number: 8161197
    Abstract: Method and system for efficient buffer management for layer 2 through layer 5 network interface controller applications are provided. Aspects of the method may comprise determining whether an active NIC connection is an L2 type, an L4 type, or an L5 type. At least one buffer descriptor may be cached locally on a network interface controller (NIC) managed by a NIC application. The buffer descriptor is associated with the determined type of the active NIC connection. If the at least one active NIC connection is of the L2 or L4 type, the buffer descriptor may comprise at least one of a receive (RX) buffer descriptor and a transmit (TX) buffer descriptor. If the NIC connection is of the L5 type, the buffer descriptor may comprise at least one of a upper translation page table (TPT) entry and a lower TPT entry.
    Type: Grant
    Filed: October 22, 2004
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventors: Scott McDaniel, Kan Fan
  • Patent number: 8160030
    Abstract: The present invention provides a data rate controller system for determining the coder used, and hence the data rate, for a plurality of channels in an associated network. Each channel provides statistical information about an associated signal to a central controller (or call/resource manager). The controller considers the information and sends control instructions to each channel for selecting an appropriate coder and/or data rate. The statistical information might include lost-frame rate, jitter, call event discrimination, and system resource utilization. By considering each channel from a centralized standpoint, the network can be optimized according to network capabilities and channel resource capabilities. A profile might also be used where each channel autonomously chooses a coder based upon background noise derived from the source signal.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Wilfred LeBlanc
  • Patent number: 8160500
    Abstract: A method for processing signals in a wireless communication system includes determining at a receiver, a maximum one of a plurality of signal-to-interference-plus-noise ratio (SINR) values for a received wireless signal. The plurality of SINR values may be calculated using a corresponding plurality of weight values. A particular one of the corresponding plurality of weight values may be fed back to a transmitter of the received wireless signal. The particular one of the corresponding plurality of weight values may be associated with the determined maximum one of the calculated plurality of SINR values. The particular one of the corresponding plurality of weight values may be communicated to the transmitter via at least one uplink communication channel. The at least one uplink communication channel may include a high-speed dedicated physical control channel (HS-DPCCH). Each of the plurality of SINR values may include at least one inter-path interference (IPI) value.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventors: Severine Catreux-Erceg, Vinko Erceg
  • Patent number: 8160168
    Abstract: A first oscillating signal may be generated via a first direct digital frequency synthesizer of a communication device. One or more second oscillating signals may be generated via one or more second direct digital frequency synthesizers of the communication device. Signals received via a plurality of antennas may be processed utilizing the first oscillating signal. Signals to be transmitted via the plurality of antennas may be processed utilizing the first oscillating signal and the one or more second oscillating signals. The communication device may comprise a plurality of receive channels, a plurality of transmit channels, and a multiplexer. The first oscillating signal may be coupled, via the multiplexer, to the plurality of receive paths and one of the transmit paths. During time intervals in which the communication device is configured to receive signals via the plurality of antennas, the multiplexer may route the first oscillating signal to the first one or more direct digital frequency synthesizers.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8160498
    Abstract: Aspects of a method and system for portable data storage with an integrated 60 GHz radio may include establishing a microwave communication link between a wireless portable storage device and a wireless transmitter and/or wireless receiver. Beamforming parameters of a first antenna array coupled to said wireless portable storage device and a second antenna array coupled to said wireless transmitter and/or wireless receiver may be adjusted automatically and/or dynamically. The wireless portable storage and the wireless transmitter and/or wireless receiver may exchange data via said first antenna array and said second antenna array. A secondary wireless communication link may be established to initialize the establishing of the microwave communication link. The secondary wireless communication link may be established via Bluetooth protocol. The wireless portable storage and the wireless transmitter and/or wireless receiver may receive and transmit in the 60 GHz frequency band.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8159931
    Abstract: A method, system and apparatus for communication in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is provided. The method includes allocating a plurality of sequences to a plurality of sectors in the OFDMA communication system. The plurality of sequences are orthogonal to each other. The method further includes communicating one or more OFDM tiles between one or more MSs in one or more sectors of the plurality of sectors and one or more BSs of the one or more sectors. The one or more OFDM tiles include one or more sequences of the plurality of sequences allocated to the one or more sectors.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventors: Rajesh Raja Manakkal, Leena Zacharias, Louay Jalloul
  • Patent number: 8160109
    Abstract: Aspects of the invention provide a method and system for synchronizing a transceiver and a framer in an optical transmission network. Subsequent to achieving synchronization of an inbound data stream, an internal framer may be adapted to inform a downstream device such as a full framer, that synchronization has already been attained. Accordingly, the downstream device may not need to perform resynchronization of the inbound data and can immediately start processing the inbound data. Advantageously, the internal framer may provide expedited error checking, handling and reporting prior to receipt of the data by the downstream device.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventors: Jay Proano, Sheila Oiu, Tim Chan, Hongtao Jiang
  • Patent number: 8160188
    Abstract: Method and system for wireless communication in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is disclosed. The method involves receiving a plurality of receive-signals over a first set of antennas. Further, one or more of the plurality of receive-signals are cyclically delayed to generate one or more cyclically delayed receive-signal. Subsequently, one or more of the plurality of receive-signals are combined with one or more of the cyclically delayed receive-signals. In other words, the method involves performing receive Cyclic Delay Diversity (CDD).
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventors: Sriram Mudulodu, Louay Jalloul
  • Patent number: 8161126
    Abstract: Systems and methods for remote direct memory access (RDMA) queue pair (QP) state split between a RDMA aware network interface card (RNIC) and a host software or application are provided. If a QP state associated with a specific QP comprises a RTS state, the QP state may be processed by an RNIC coupled to a host. If the QP state comprises an “idle” state, a “terminate” state, an “error” state, and/or a “closing” state, the QP state may be offloaded to the host for processing. If the QP state comprises a RTS state, ownership of the QP may be transferred from the host to the RNIC. If the QP state comprises an “idle” state, a “terminate” state, an “error” state, and/or a “closing” state, ownership of the QP may be transferred from the RNIC to the host.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Kan F. Fan
  • Patent number: 8160248
    Abstract: Methods and systems for authenticated mode control in controlled devices are disclosed. A method for changing a mode in a controlled device from a current mode includes selecting one of several available key derivation functions based on a target mode, generating a target mode specific root key using a global root key and the selected key derivation function, and the use of that root key to affect a change of the controlled device to a target mode. Corresponding devices and systems are also disclosed. In one embodiment, the methods are applicable to a cable television distribution system and the changing of the operating mode of a set top box from one conditional access provider to another.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventor: Andrew Dellow
  • Patent number: 8160127
    Abstract: An apparatus is disclosed to compensate for non-linear effects resulting from the transmitter, the receiver, and/or the communication channel in a communication system. A receiver of the communication system contains an image cancellation module that compensates for images generated during the modulation and/or demodulation process. The image cancellation module includes a fine carrier correction loop to correct for frequency offsets between the transmitter and receiver. The image cancellation module includes a coarse acquisition mode and a decision directed mode. The decision directed mode allows for a larger signal-to-noise ratio for the receiver when compared against the coarse acquisition mode.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: April 17, 2012
    Assignee: Broadcom Corporation
    Inventors: Bruce J. Currivan, Loke Kun Tan, Thomas Joseph Kolze, Hanli Zou, Lin He