Patents Assigned to Broadcom Corporation
  • Publication number: 20080242249
    Abstract: In an embodiment, a receiver for processing a RF input signal having a variable signal strength includes an RF amplifier, an IF amplifier, and a controller. The RF amplifier is configured to receive and amplify the RF input signal. The IF amplifier is coupled to an output of the RF amplifier. The controller controls gains of the RF amplifier and the IF amplifier during times of falling signal strength. A gain of the IF amplifier is increased as the signal strength falls until a first amplitude threshold is reached for the falling signal strength. If the signal strength falls beyond the first threshold, a gain of the RF amplifier is increased until a second amplitude threshold is reached. The second amplitude threshold is lower than the first amplitude threshold. If the signal strength falls below the second amplitude threshold, the gain of the IF amplifier is further increased.
    Type: Application
    Filed: September 13, 2007
    Publication date: October 2, 2008
    Applicant: Broadcom Corporation
    Inventors: Ramon Alejandro Gomez, Stephen Krafft, Tommy Yu
  • Publication number: 20080242349
    Abstract: A circuit for use in a wireless communication device includes a on-chip gyrating circuit that generates a motion parameter based on motion of the circuit. A GPS receiver receives a GPS signal and that generates GPS position data based on the GPS signal. A processing module processes the motion parameter to produce motion data and generates position information based on the GPS position data and the motion data. A wireless telephone transceiver generates an outbound RF signal that includes outbound voice data and position information and that generates voice inbound data from an inbound RF signal.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 2, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080238626
    Abstract: A far field radio frequency identification (RFID) reader includes a baseband processing module, a transmitter section, and a receiver section. The receiver section includes a low noise amplifier module, a down conversion module, and a current mode blocking circuit. The low noise amplifier module amplifies an inbound RF signal to produce an amplified inbound RF signal. The down conversion module converts the amplified inbound RF signal into the inbound baseband signal. The current mode blocking circuit substantial compensates for a blocking current component of the baseband inbound signal and passes, substantially unattenuated, a signal current component of the baseband inbound signal.
    Type: Application
    Filed: March 14, 2008
    Publication date: October 2, 2008
    Applicant: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran
  • Publication number: 20080238629
    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 a 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: March 29, 2007
    Publication date: October 2, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Mark Gonikberg
  • Publication number: 20080242354
    Abstract: A device includes an on-chip gyrating circuit that generates a motion parameter based on motion of the device. An RF transceiver generates an outbound RF signal from an outbound symbol stream, transmits the outbound RF signal to a remote station of a wireless network, and generates an inbound symbol stream from an inbound RF signal received from the at least one remote station. A processing module is coupled to process the motion parameter to produce motion data, to convert outbound data into the outbound symbol stream, and to convert the inbound symbol stream into inbound data, wherein the outbound data includes the motion data.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 2, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza Reza Rofougaran
  • Publication number: 20080242240
    Abstract: A wireless communication device includes an integrated circuit (IC) and an antenna system. The IC includes a baseband processing module, a network processing module, a calibration processing module, a receiver section and a transmitter section. The network processing module establishes a wireless communication protocol and operational parameters based on the wireless communication protocol. The calibration processing module generates RF receiver calibration information based on the operational parameters and RF receive feedback and generates RF transmitter calibration information based on the operational parameters and RF transmit feedback. The receiver section provides the RF receive feedback and converts an inbound RF signal into an inbound symbol stream. The transmitter section provides the RF transmit feedback and converts an outbound symbol stream into an outbound RF signal.
    Type: Application
    Filed: March 28, 2007
    Publication date: October 2, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Ahmadreza Reza Rofougaran, Maryam Rofougaran
  • Publication number: 20080238203
    Abstract: Traditionally, system loads are placed in parallel with the battery. This simple topology wastes the available power if the USB power and/or wall adapter is present. Recent topologies have made some improvements by powering the load by the maximum available voltage. Thus, if a USB power source or wall adapter is present, the load is powered by them rather than the battery, thus improving the system efficiency. However, since the USB power and wall adapter power are current limited, if the load requires higher current than the current limited USB or adapter, then the entire system is powered at voltage of the battery. The present invention further improves the system efficiency by distinguishing the load and powering the constant power loads by the maximum voltage and placing the constant current loads in parallel with the battery.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 2, 2008
    Applicant: Broadcom Corporation
    Inventors: Sridhar Kotikalapoodi, Farzan Roohparvar, Tivadar Szabo, Manisha Pandya
  • Publication number: 20080242346
    Abstract: A wireless communication device includes an integrated circuit (IC) and an antenna system. The IC includes a processing module and a transceiver section. The processing module establishes a wireless communication protocol, converts outbound data into an outbound symbol stream, converts an inbound symbol stream into inbound data, and establishes operational parameters. The transceiver section converts an inbound RF signal into the inbound symbol stream and converts the outbound symbol stream into an outbound RF signal. The antenna system provides a plurality of antenna structures corresponding to the plurality of operational modes of the wireless communication device, wherein the antenna system provides one of the plurality of antenna structures in accordance with the operational parameters to transceive the inbound and outbound RF signals.
    Type: Application
    Filed: March 28, 2007
    Publication date: October 2, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran
  • Publication number: 20080238703
    Abstract: An integrated circuit includes an on-chip gyrating circuit that generates a motion parameter based on motion of the IC. An RF transceiver generates an outbound RF signal from outbound data and that generates inbound data from an inbound RF signal. A processing module processes the motion parameter, generates the outbound data, and receives the inbound data.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 2, 2008
    Applicant: Broadcom Corporation, a Californica Corporation
    Inventor: Ahmadraza (Reza) Rofougaran
  • Publication number: 20080238625
    Abstract: A near field communication front-end includes an up conversion module, a plurality of coils, and a down conversion module. The up conversion module is coupled to convert an outbound symbol stream into a plurality of outbound signals based on a frequency-space encoding scheme. The plurality of coils is coupled to electromagnetically transmit the plurality of outbound signals and to electromagnetically receive a plurality of inbound signals in accordance with the frequency-space encoding scheme. The down conversion module is coupled to convert the plurality of inbound signals into an inbound symbol stream in accordance with the frequency-space encoding scheme.
    Type: Application
    Filed: March 14, 2008
    Publication date: October 2, 2008
    Applicant: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Amin Shameli
  • Patent number: 7430438
    Abstract: A method for an antenna architecture that handles US band cellular and broadcast channels may be provided. The method may comprise receiving at a first radio frequency integrated circuit (RFIC) integrated within a mobile terminal, first signals via a first antenna, where the first signals comprise signals within a 1900 MHz band. The method may further comprise receiving at a second RFIC integrated within the mobile terminal, second signals via the first antenna, where the second signals comprise signals within at least one of a 1900 MHz band and a 850 MHz band and receiving at a third RFIC integrated within the mobile terminal, third signals via the first antenna, where the third signals comprise signals within a VHF/UHF broadcast band.
    Type: Grant
    Filed: December 13, 2004
    Date of Patent: September 30, 2008
    Assignee: Broadcom Corporation
    Inventor: Pieter Gert Wessel van Rooyen
  • Patent number: 7430211
    Abstract: Systems and methods that provide receive queue provisioning are provided. In one embodiment, a communications system may include, for example, a first queue pair (QP), a second QP, a general pool and a resource manager. The first QP may be associated with a first connection and with at least one of a first limit value and an out-of-order threshold. The first QP may include, for example, a first send queue (SQ). The second QP may be associated with a second connection and with a second limit value. The second QP may include, for example, a second SQ. The general pool may include, for example, a shared receive queue (SRQ) that is shared by the first QP and the second QP. The resource manager may provide, for example, provisioning for the SRQ and may manage the first limit value and the second limit value.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: September 30, 2008
    Assignee: Broadcom Corporation
    Inventor: Uri Elzur
  • Patent number: 7429992
    Abstract: Providing accelerated video processing in a communication device may comprise receiving video data from a video source on a chip, determining a first format for at least a portion of the received video data, and determining a second format of at least a remaining portion of the received video data. At least a portion of the received video data having the first format may be routed to a first device for processing and at least a remaining portion of the received video data having the second format may be routed to a second device for processing. The portion of the received video data with the first format may comprise RGB format, while the remaining portion of the received video data with the second format comprises YUV format. The received video data comprises images with alternating video formats, which are accordingly routed to the first or second device for processing.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: September 30, 2008
    Assignee: Broadcom Corporation
    Inventor: Joy Li
  • Patent number: 7429891
    Abstract: Methods and systems for processing a plurality of signals are disclosed herein. Aspects of the method may comprise amplifying an input signal. The amplified input signal may be bandpass filtered. Amplification of the input signal may be adjusted based on only narrowband received signal strength indication of the bandpass filtered amplified input signal. The amplified input signal may be downconverted and a blocker signal may be bandpass filtered from the amplified input signal. Signal strength of a desired signal from the amplified input signal may be measured. The amplification of the input signal may be adjusted utilizing a triple well (TW) NMOS transistor. A control signal may be generated based on the narrowband received signal strength indication of the bandpass filtered amplified input signal. The amplification of the input signal may be adjusted based on at least one of the generated control signals.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: September 30, 2008
    Assignee: Broadcom Corporation
    Inventors: Hooman Darabi, Henrik T. Jensen, Brima Ibrahim
  • Patent number: 7430240
    Abstract: An automatic polarity swap is implemented in a communications system. Two or more transceivers having differential inputs and outputs are coupled together through an interface, such as a backplane to form a communications system. In such a configuration, it is possible to cross-connect the differential data lines or signals at the interface, which will cause invalid data words to received at the second transceiver. Accordingly, the present invention includes an error check and correction module that detects invalid data words after parallel-to-serial conversion. More specifically, an error check determines if the parallel differential signal represents a valid data word. This can be done, for example, by storing and comparing valid data words in a memory such as RAM. If the received data word is valid, then no corrective action is taken.
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: September 30, 2008
    Assignee: Broadcom Corporation
    Inventor: Vasudevan Parthasarathy
  • Patent number: 7430680
    Abstract: A system and method use an aligning device to align clock signals of two logic devices before data transfer between them. In this example, the aligning device aligns a clock signal of a sequencer with a clock signal of a storage device before the sequencer transfers data to the storage device. The aligning device includes a phase detector that receives a first reference clock signal, which is used to control the storage device, and a delayed signal, which is used to control the sequencer, and generates a comparison clock signal. The comparison clock signal is filtered before being used to control a phase of a second reference clock signal, which is related to the first reference clock signal. The phase controlled second clock signal is an aligning clock signal that is feed back to a delay device to produce one or more subsequent delay device clock signals that are aligned to the storage device clock or first reference clock signal.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: September 30, 2008
    Assignee: Broadcom Corporation
    Inventors: Lionel J. D'Luna, Thomas A. Hughes, Sathish Kumar Radhakrishnan
  • Patent number: 7430171
    Abstract: A switch, switched architecture and process for transferring data through an FCAL switch is disclosed. The switch uses multiple switch control circuits each coupled to one FCAL network and all connected to a crossbar switch. The switch control circuits are coupled together by a protocol bus for coordination purposes. Local conversations can occur on each FCAL loop and crossing conversations through the switch can occur concurrently. The OPN primitive is used to establish the connection before any data is transferred thereby eliminating the need for buffer memory in the switch control circuits. The destination address of each OPN is used to address a lookup table in each switch control circuit to determine if the destination node is local. If not, the destination is looked up and a connection request made on the protocol bus. If the remote port is not busy, it sends a reply which causes both ports to establish a data path through the backplane crossbar switch.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: September 30, 2008
    Assignee: Broadcom Corporation
    Inventors: Alistair D. Black, Kurt Chan
  • Publication number: 20080235523
    Abstract: In a Power over Ethernet (POE) system, a power source equipment (PSE) device configured to deliver power to one or more powered devices (PDs) over a plurality of Ethernet transmission lines. The PSE interface includes a multi-port transmission line connector capable connecting to multiple Ethernet transmission lines, and a power source equipment (PSE) controller module integrated with the multi-port transmission line connector. The PSE controller module is capable of high power operation beyond that specified by IEEE standard 802.3af™ for powered devices. More specifically, the PSE controller is configured to deliver over 15.4 Watts, and up to 36 Watts of power, to meet the needs of high powered devices such as IP Phones, and access points. Further, the PSE controllers can utilize, currently unused, class 4 of IEEE standard 802.3af™ to identify, initiate, and classify the high power operation mode.
    Type: Application
    Filed: March 20, 2008
    Publication date: September 25, 2008
    Applicant: Broadcom Corporation
    Inventor: Asif HUSSAIN
  • Publication number: 20080233998
    Abstract: The wide bandwidth transceiver includes a receiver section, a transmitter section, and a local oscillation module. The local oscillation module generates a first and a second local oscillation. The transmitter section converts an outbound baseband signal and/or a low intermediate frequency (IF) signal into a first outbound radio frequency (RF) signal based on the second local oscillation when the wide bandwidth transceiver is in a second wireless standard mode and converts the outbound baseband and/or the low IF signal into a second outbound RF signal based on the first and second local oscillations when the wide bandwidth transceiver is in a first wireless standard mode.
    Type: Application
    Filed: May 29, 2008
    Publication date: September 25, 2008
    Applicant: Broadcom Corporation
    Inventor: AHMADREZA (REZA) ROFOUGARAN
  • Patent number: 7428247
    Abstract: A method and computer program product for providing RTP suppression across a DOCSIS network. An index number and a set of rules are sent to a receiver. The index number indicates the type of header suppression technique (i.e., RTP header suppression) to be performed, and the set of rules define how to recreate the RTP packets on the receiving end. At least one complete RTP packet is transmitted upstream for enabling a receiver to learn the RTP header. Subsequent RTP packets are transmitted upstream for reconstruction at the receiving end. The subsequent RTP packets are comprised of delta values representing fields that dynamically change from packet to packet in an RTP header.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: September 23, 2008
    Assignee: Broadcom Corporation
    Inventors: Fred A. Bunn, Thomas L. Johnson, Joel Danzig