Patents Assigned to Broadcom
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Patent number: 7908420Abstract: A processing system includes a plurality of first circuit modules and a wired data bus, connected to the plurality of first circuit modules. A plurality of second circuit modules are coupled to an RF data bus via a millimeter wave communication path. A millimeter wave modem receives first data from at least one of the plurality of first circuit modules via the wired data bus, and transmits the first data over the RF data bus to at least one of the plurality of second circuit modules.Type: GrantFiled: July 31, 2007Date of Patent: March 15, 2011Assignee: Broadcom CorporationInventor: Ahmadreza (Reza) Rofougaran
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Patent number: 7907907Abstract: RF communications received by a wireless terminal from a servicing base station are used to determine the downlink quality report and implement link adaptation decisions. This involves first implementing an initial transmission scheme between the servicing base station and the wireless terminal. Next, a current downlink quality report corresponding to the initial transmission scheme is generated by the wireless terminal and received at the servicing base station. This downlink quality report is based in whole or in part on a bit-error probability (BEP). The current downlink quality report that corresponds to the initial transmission scheme is then compared to link adaptation thresholds.Type: GrantFiled: July 27, 2006Date of Patent: March 15, 2011Assignee: Broadcom CorporationInventor: Xiaoxin Qiu
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Publication number: 20110057731Abstract: Embodiments of the present invention enable a feedback-based VCO linearization technique. Embodiments include a frequency locked loop formed by feeding back a VCO's output into the VCO's input in negative phase by means of a frequency-to-voltage (F/V) converter. Embodiments enable constant VCO gain over a wide input tuning range and across PVT variations. Further, embodiments can be nested within a PLL, for example, with negligible area and power consumption overhead.Type: ApplicationFiled: September 10, 2009Publication date: March 10, 2011Applicant: Broadcom CorporationInventors: Michael YOUSSEF, Ahmad Mirzaei, Hooman Darabi
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Publication number: 20110058540Abstract: A system and method is provided for supporting data transfer protocols that extend beyond standard protocols used in conventional data over cable systems. A subscriber station in accordance with the invention determines, during registration, whether a base station with which it communicates is capable of supporting an extended protocol, and if it is, transfers data to the base station in accordance with the extended protocol. Additionally, a base station in accordance with the invention is notified during registration whether or not a subscriber station supports an extended protocol and stores this information. When a request for transmission opportunity is subsequently received from the subscriber station, the base station accesses the stored information to determine if the cable modem supports the extended protocol.Type: ApplicationFiled: November 10, 2010Publication date: March 10, 2011Applicant: Broadcom CorporationInventors: Fred A. Bunn, Thomas L. Johnson
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Publication number: 20110057604Abstract: Disclosed is a method for use by a device to distinguish between a Charging Downstream Port (“CDP”) and a Dedicated Charging Port (“DCP”). The method comprises detecting that the device is attached to a charging port, and determining whether the charging port is the CDP or the DCP without causing a host coupled to the CDP to be able to detect the device if the charging port is the CDP.Type: ApplicationFiled: March 25, 2010Publication date: March 10, 2011Applicant: BROADCOM CORPORATIONInventor: Sebastian Joseph Capella
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Publication number: 20110058054Abstract: A radio transmitter integrated circuit includes a photodiode array circuit, a digital conversion module, and a transmit baseband processing module. The photodiode array circuit converts received light into electrical image signals. The digital conversion module converts the electrical image signals into digital image signals. The transmit baseband processing module converts the digital image signals into digital transmit baseband or low IF signals.Type: ApplicationFiled: November 15, 2010Publication date: March 10, 2011Applicant: BROADCOM CORPORATIONInventor: Ahmadreza (Reza) Rofougaran
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Publication number: 20110057744Abstract: A balun that includes a first conductor, a second conductor, and a third conductor. The first conductor has a first length. The first conductor also has a first end connected to a first balanced power amplifier output port. The second conductor has substantially the same first length. The second conductor also includes a first end connected to a second balanced power amplifier output port and a second end connected to a second end of the first conductor. The third conductor has substantially the same first length. The third conductor has a first end connected to an antenna port and a second end connected to a ground potential.Type: ApplicationFiled: November 12, 2010Publication date: March 10, 2011Applicant: Broadcom CorporationInventors: Tom McKay, Vas Postoyalko, Edwin Li
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Publication number: 20110058477Abstract: Apparatus and methods for intelligent congestion feedback are disclosed. An example apparatus includes a data interface configured to receive data packets from a source endpoint via an intermediate node. The data packets include a field indicating whether data congestion for data being sent to the destination endpoint is occurring. The example apparatus also includes a timer. The example apparatus further includes a feedback loop interface configured to selectively enable a feedback loop to the source endpoint and to transmit congestion notification (CN) messages to the source endpoint over the feedback loop. Upon receiving a data packet indicating that congestion has occurred due to the data packets from the source endpoint to the destination endpoint, the destination endpoint is configured to set the timer to a preset time value; start the timer reverse counting from the preset time value to zero, enable the feedback loop and transmit the CN messages.Type: ApplicationFiled: November 12, 2010Publication date: March 10, 2011Applicant: BROADCOM CORPORATIONInventors: Bruce Kwan, Puneet Agarwal
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Publication number: 20110058813Abstract: Embodiments of the present invention exploit the existing capabilities of the Ethernet Passive Optical Network (EPON) MAC layer, designed for fiber optics communications, to provide a low cost MAC layer with upper layer connectivity over a hybrid fiber coaxial (HFC) network. In particular, embodiments allow for the EPON MAC to be used end-to-end (i.e., from an optical line terminal (OLT) to a coaxial network unit (CNU)) in a HFC network, thereby fully leveraging the packet processing capabilities, QoS functions, and management features of the EPON MAC. Furthermore, embodiments enable unified provisioning and management for both fiber and coaxial network units in a HFC network.Type: ApplicationFiled: September 9, 2010Publication date: March 10, 2011Applicant: Broadcom CorporationInventors: Edward Wayne BOYD, Sanjay Goswami
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Publication number: 20110057271Abstract: Optimization of the implantation structure of a metal oxide silicon field effect transistor (MOSFET) device fabricated using conventional complementary metal oxide silicon (CMOS) logic foundry technology to increase the breakdown voltage. The techniques used to optimize the implantation structure involve lightly implanting the gate region, displacing the drain region from the gate region, and implanting P-well and N-well regions adjacent to one another without an isolation region in between.Type: ApplicationFiled: November 10, 2010Publication date: March 10, 2011Applicant: Broadcom CorporationInventors: Akira ITO, Henry Kuo-Shun CHEN
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Patent number: 7904645Abstract: Formatting disk drive data using format field elements (FFEs). A processing module (which can be a general purpose processor or a RISC (Reduced Instruction Set Computer) processor) is employed to generate FFEs that are employed to govern operation of the various data formatting modules within a formatting system within a HDD. The determination of when a data formatting module stops operating in accordance with a first FFE and begins operating in accordance with a second FFE can be a predetermined period of time, a number of operations being performed, the meeting of some condition, or some other means. Each FFE can be viewed as being a multi-dimensional instruction that not only includes a configuration for a data formatting module, but also includes the conditions by which the configuration is to be governed by a subsequent FFE, among other things.Type: GrantFiled: January 11, 2008Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventor: John P. Mead
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Patent number: 7904042Abstract: Fast image rejection. Dual down conversion processing of a received signal by performing both low side injection and high side injection thereby generating a first down converted signal and a second down converted signal. Analysis of one or both of the first and second down converted signals, including the signal and image components thereof, is performed to determine which of the first down converted signal and the second down converted signal is appropriate to be selected for subsequent baseband processing. For example, if a signal strength of an image within the first down converted signal is less than a signal strength of a signal component within the first down converted signal, then the first down converted signal is most likely the appropriate signal to undergo baseband processing. Alternatively, if the converse is true, then the second down converted signal may be the appropriate signal to undergo baseband processing.Type: GrantFiled: February 8, 2008Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventor: Hooman Darabi
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Patent number: 7904049Abstract: A baseband processing module for use within a Radio Frequency (RF) transceiver includes a downlink/uplink interface, TX processing components, a processor, memory, RX processing components, and a turbo decoding module. The RX processing components receive a baseband RX signal from the RF front end, produce a set of IR samples from the baseband RX signal, and transfer the set of IR samples to the memory. The turbo decoding module receives a set of IR samples from the memory, forms a turbo code word from the set of IR samples, turbo decodes the turbo code word to produce inbound data, and outputs the inbound data to the downlink/uplink interface. The turbo decoding module performs metric normalization based upon a chosen metric, performs de-rate matching on the set of IR samples, performs error detection operations, and extracts information from a MAC packet that it produces.Type: GrantFiled: February 2, 2010Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventors: Mark David Hahm, Li Fung Chang
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Patent number: 7904074Abstract: A system and method for the remote configuration and control of a access devices via a broadband access gateway is disclosed. The broadband access gateway may comprise a wireless interface and a broadband network connection for exchanging information via, for example, a digital subscriber loop, a cable connection, a T1 connection, and T3 network connection. A user using any of a plurality of access devices may communicate with the broadband access gateway via the wireless interface or the broadband network connection to make remote requests of another of the access devices. Such requests may comprise, for example, accessing, recording, playing, exchanging, transmitting, receiving, converting, translating of multimedia information. The remote requests may include enabling, disabling, configuring, monitoring, administering, and scheduling of smart appliances and premise systems such as, for example, security, heating, and cooling systems.Type: GrantFiled: March 30, 2005Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventors: Jeyhan Karaoguz, Marc Abrams, Nambirajan Seshadri
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Patent number: 7904624Abstract: A system includes a first bus segment and a second bus segment. The first bus segment is operatively coupled to one or more first bus agents, where the first bus agents are configured for writing messages to the first bus segment and reading messages from the first bus segment and the second bus segment, which is separate from the first bus segment, is operatively coupled to one or more second bus agents. The first bus agents are configured for writing messages to the first bus segment and reading messages from the first bus segment. The system also includes first electrical circuitry operably coupled to the first bus segment and the second bus segment and configured to read messages written on the first bus segment and to write the messages onto the second bus segment and second electrical circuitry operably coupled to the first bus segment and the second bus segment and configured to read messages written on the second bus segment and to write the messages onto the first bus segment.Type: GrantFiled: January 5, 2009Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventors: Fong Pong, Leif O'Donnell
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Patent number: 7904750Abstract: A system and method identifies and masks physical sectors where the errors encountered during the defect scan exceed a predetermined level. This avoids the need to read and process all the data written to an individual sector during the initial defect scan. This method first writes a predetermined pattern such as a 2-T pattern to the magnetic media available for user data. This written pattern is then read. As the pattern is read, an error result increments or decrements a counter based on the error. The counter reaching a predetermined level signifies that there are too many errors in this physical sector. This sector may then be added to the primary defect list and masked out without reading the remaining written pattern within the sector. This will result significant time savings as physical sectors containing multiple errors are identified without process all the information written to the physical sector.Type: GrantFiled: June 27, 2006Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventors: Bobby Ray Southerland, John P. Mead
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Patent number: 7903724Abstract: A radio frequency (RF) transceiver device includes a processing module, memory, a baseband processing module, an RF section, an RF bus, and an RF bus controller. The processing module and the memory include an RF bus transceiver. The baseband processing module is coupled to convert outbound data into an outbound symbol stream and to convert an inbound symbol stream into inbound data. The RF section is coupled to convert the outbound symbol stream into an outbound RF signal and to convert an inbound RF signal into the inbound symbol stream. The RF bus controller is coupled to control access to an RF bus for providing the outbound data as an RF bus outbound data signal from the processing module RF bus transceiver or from the memory RF bus transceiver and to control access to the RF bus for providing the inbound data as an RF bus inbound data signal to the processing module RF bus transceiver or to the memory RF bus transceiver.Type: GrantFiled: January 31, 2007Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventor: Ahmadreza (Reza) Rofougaran
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Patent number: 7902917Abstract: Embodiments of the present invention relate generally to reconstruction filtering. In particular, embodiments enable highly linear, highly programmable, and easily reconfigurable reconstruction filters. Further, embodiments provide substantial power consumption, area, and cost savings compared to conventional solutions. For example, embodiments use all-passive filtering and substantially reduce active elements compared to conventional solutions. As a result, significant reductions in required area, noise, and power consumption can be achieved. In addition, embodiments perform filtering solely in the current domain, thereby eliminating the non-linear voltage-to-current conversion used in conventional circuits and enabling highly linear filtering. Furthermore, embodiments are highly programmable and easily reconfigurable without the use of tunable capacitors. As such, embodiments are very suitable solutions for multi-band multi-mode wireless transmitters.Type: GrantFiled: July 17, 2009Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventors: Ahmad Mirzaei, Hooman Darabi
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Patent number: 7903598Abstract: An apparatus and method is disclosed to calculate the actual received desired channel power from the downstream transmit power of a Cable Modem Termination System (CMTS) when operating at the nominal line voltage and/or at the normal room temperature as per the DOCSIS specification. A Set-top Device produces a Downstream Power Management (DPM) gain measurement signal having a known power level. The Set-top Device embeds the DPM gain measurement signal onto a received downstream multi-channel communication signal. After embedding the DPM gain measurement signal onto the downstream multi-channel communication signal, the Set-top Device downconverts the combined DPM gain measurement signal and downstream multi-channel communication signal to recover one or more communication channels containing information of a broadcast.Type: GrantFiled: June 7, 2010Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventors: Dongsoo Daniel Koh, Ramon Alejandro Gomez, Francesco Gatta, Harold Raymond Whitehead, Donald G. McMullin
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Patent number: 7904108Abstract: Double transformer balun for maximum PA (Power Amplifier) power. A novel approach is presented herein by which conversion from a differential signal to single-ended signal may be achieved using a double transformer balun design. The secondary coils of the double transformer balun also operate as a choke for the PA supply voltage. The secondary coils can operate as an RF (Radio Frequency) trap or choke to keep any AC (Alternating Current) signal components and to pass any DC (Direct Current) components. By using a double transformer balun design, relatively thinner tracks may be employed thereby ensuring a high degree of electromagnetic coupling efficiency and high performance. Also, these relatively thinner tracks consume a relatively small amount of space on the die. The double transformer balun design also includes a matching Z (impedance) block that is operable to math the Z of an antenna or line that the PA is driving.Type: GrantFiled: April 7, 2004Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventors: Jesus Alfonso Castaneda, Qiang Li, Ahmadreza (Reza) Rofougaran