Patents Assigned to Broadcom
  • Patent number: 8761598
    Abstract: A communication device may be operable to determine, in an optical module, a signal quality associated with each of one or more host transmitter filters in a host circuit. The signal quality may be communicated from the optical module to the host circuit via a management interface. The communication device may control, in the host circuit, configuration of each of the host transmitter filters based on the signal quality. The communication device may be operable to determine, in the host circuit, a signal quality associated with each of one or more module transmitter filters in the optical module. The signal quality associated with each of the module transmitter filters may be communicated from the host circuit to the optical module via the management interface. The communication device may control, in the optical module, configuration of each of the module transmitter filters based on the signal quality.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: June 24, 2014
    Assignee: Broadcom Corporation
    Inventors: Sudeep Bhoja, Ali Ghiasi
  • Patent number: 8761694
    Abstract: Embodiments for at least one method and apparatus of a multiple antenna transceiver are disclosed. One embodiment of the multiple antenna transceiver includes a multiport network having a plurality of first ports and a plurality of second ports, wherein at least one of the second ports is responsive to at least two of the first ports. The multiple antenna transceiver further includes a plurality of antennas, an antenna connected to each of the plurality of second ports. Another embodiment includes a multiple antenna subscriber unit architecture.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: June 24, 2014
    Assignee: Broadcom Corporation
    Inventors: Robert G. Lorenz, Bertrand M. Hochwald
  • Patent number: 8761138
    Abstract: There is provided a method, including detecting, by a user terminal connected to a public land mobile net-work, PLMN, via a first radio access technology and having requested a circuit switched fallback service procedure, that a network controlled radio access technology change related to the circuit switched fallback service procedure is not performed; and selecting a second radio access technology to be applied on the basis of stored information, wherein the second radio access technology to be applied is capable to provide circuit switched services and the stored information associates at least one PLMN with at least one radio access technology.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: June 24, 2014
    Assignee: Broadcom Corporation
    Inventors: Matti Moisanen, Petri Pelkonen
  • Patent number: 8761193
    Abstract: A wireless communication device is disclosed that is capable of utilizing bandwidth outside of its allocated bandwidth in order to maximize frequency coverage. The allocated band is separate from a neighboring band by a guard band. The device performs a scan of the neighboring band in order to determine an activity level within the neighboring band. Based on the determined activity level, the device expands its communication frequency range to include the guard band and/or the neighboring band. Once expanded, the device periodically rescans the neighboring band in order to determine whether the device must contract its frequency band out of the expanded area. The device can also receive activity level information of the neighboring band from a server via a common network infrastructure, and can coordinate expansion with other devices.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: June 24, 2014
    Assignee: Broadcom Corporation
    Inventors: James Bennett, Jeyhan Karaoguz
  • Patent number: 8761300
    Abstract: According to one embodiment, a peak detector having extended dynamic range comprises a first differential output coupled to a supply voltage of the peak detector by a first load and coupled to ground by first and second switching devices, and a second differential output coupled to the supply voltage by a second load and coupled to ground by third and fourth switching devices. The control terminals of the first, second, third, and fourth switching devices receive a common bias voltage, and the respective first and second control terminals are configured as differential inputs of the peak detector. In some embodiments, corresponding first power terminals of the first and second switching devices share a first common node further shared by the first differential output, and corresponding first power terminals of the third and fourth switching devices share a second common node further shared by the second differential output.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: June 24, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmad Mirzaei, Hooman Darabi
  • Patent number: 8762846
    Abstract: A 2D and/or 3D video processing device comprising a camera and a display captures images of a viewer as the viewer observes displayed 2D and/or 3D video content in a viewport. Face and/or eye tracking of viewer images is utilized to generate a different viewport. Current and different viewports may comprise 2D and/or 3D video content from a single source or from different sources. The sources of 2D and/or 3D content may be scrolled, zoomed and/or navigated through for generating the different viewport. Content for the different viewport may be processed. Images of a viewer's positions, angles and/or movements of face, facial expression, eyes and/or physical gestures are captured by the camera and interpreted by face and/or eye tracking. The different viewport may be generated for navigating through 3D content and/or for rotating a 3D object. The 2D and/or 3D video processing device communicates via wire, wireless and/or optical interfaces.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: June 24, 2014
    Assignee: Broadcom Corporation
    Inventors: Marcus Kellerman, Xuemin Chen, Samir Hulyalkar, Ilya Klebanov
  • Patent number: 8761200
    Abstract: A home network, in one embodiment including a home wiring system; a demarcation point unit in electrical communication with the home wiring system; and a home network module in electrical communication with the home wiring system. The home network module is adapted for connection to a home electronic device. The demarcation point unit passes data to and receives data from the home electronic device through the home network module.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: June 24, 2014
    Assignee: Broadcom Corporation
    Inventors: Avi Kliger, Rami Kopelman, Nachum Avishay, Alon Shtern, Amir Wassermann
  • Patent number: 8761829
    Abstract: Method and apparatuses for power and handoff management in a multiple wireless technology communication device are disclosed. One method includes a wireless device communicating using a first technology, and detecting availability of a second technology. Logic control of the wireless device receives a power level indicator of communication signals of the first technology, and determining an acceptable power level of communication signals of the second technology based on the power level indicator. The logic control determines a requested power level of communication signals of the second technology based on a request from a base station. The logic control provides a modified link quality representation to the base station if the requested power level is greater than the acceptable power level. The wireless device transmits to the base station with the second technology at the acceptable power level.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: June 24, 2014
    Assignee: Broadcom Corporation
    Inventor: Kameswara Medepalli
  • Patent number: 8762719
    Abstract: Aspects of a method and system for command authentication to achieve a secure interface are provided. Command authentication between a host and a slave device in a multimedia system may be achieved by on-the-fly pairing or by an automatic one-time-programming via a security processor. In an on-the-fly pairing scheme, the host may generate a host key based on a host root key and host control words while the slave may generate slave key based the host key, a slave root key and slave control words. The slave key may be stored and later retrieved by the slave device to obtain the host key for authenticating host commands. The host may be disabled from generating and/or passing the host key to the slave. In an automatic one-time programming scheme, the security processor may burn a random number onto a onetime-programmable memory in the host and slave devices for command authentication.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: June 24, 2014
    Assignee: Broadcom Corporation
    Inventors: Stephane Rodgers, Xuemin Chen
  • Patent number: 8762758
    Abstract: In Gigibit Ethernet Systems, the Trusted Platform Module (TPM) is designed to provide trust and security to a platform through integrity measurement, protected storage, and other cryptographic functions. The present invention relates to a TPM-LAN chip with separate TPM and LAN power management. The TPM-LAN chip is designed such a way that power is reduced significantly in different power management modes compared to the legacy devices. This is accomplished by turning off certain clocks during certain operating modes.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: June 24, 2014
    Assignee: Broadcom Corporation
    Inventors: Wei Wang, Andrew Hwang, Thanh Tran
  • Patent number: 8761696
    Abstract: A method and system for wireless communication is provided and may include mitigating blocker signals in transmitted RF signals in a wireless device including a transmitter front end. The mitigation may include up-converting a baseband signal, mixing the up-converted baseband signal with a feedback signal, and amplifying the mixed up-converted baseband signal and the feedback signal to generate an output signal. The feedback signal may be generated by down-converting the output signal, low-pass filtering the down-converted output signal, and up-converting the filtered down-converted signal for the summing. The blocker signals may correspond to receive frequencies for the wireless device and may be converted to DC via the down-converting. The wireless devices may operate in accordance with at least a CDMA standard.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: June 24, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmad Mirzaei, Hooman Darabi
  • Publication number: 20140167851
    Abstract: Disclosed are various embodiments of a current-mode line driver that may facilitate transmitting signals to a load. The current-mode line driver may comprise a common-mode current sense element that provides a signal corresponding to the common-mode output current of the line driver. A transconductance element receives the signal from the common-mode current sense element and provides a compensating current that is based at least in part on the signal. The compensating current may reduce the common-mode output current of the line driver.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 19, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Hui Pan, Yuan Yao, Mostafa Hammad, Karim Vincent Abdelhalim, Junhua Tan, Ichiro Fujimori
  • Publication number: 20140171006
    Abstract: A radio frequency (RF) noise-cancelling receiver includes first transconductance cells configured to produce respective weighted current signals proportional to an input voltage signal. The RF receiver includes frequency conversion cells coupled to the first transconductance cells and configured to mix the weighted current signals with a plurality of non-overlapping local oscillator (LO) signals to produce downconverted current signals. The RF receiver includes transimpedance amplifiers coupled to the frequency conversion cells and configured to produce output voltage signals proportional to the downconverted current signals. The transimpedance amplifiers include second transconductance cells.
    Type: Application
    Filed: January 8, 2013
    Publication date: June 19, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: David MURPHY, Hooman DARABI
  • Publication number: 20140169231
    Abstract: A circuit for a low-loss electrical balance duplexer (EBD) with noise cancellation may include an EBD circuit. The EBD circuit may be coupled to one or more output nodes of a transmit (TX) path, an antenna, and a one or more input nodes of a receive (RX) path. The EBD circuit may be configured to isolate the TX path from the RX path, and to provide low-loss signal paths between the one or more output nodes of the TX path and the antenna. A balancing network may be coupled to the EBD circuit and configured to provide an impedance that matches an impedance associated with the antenna. A noise cancellation circuit may be configured to sense a noise signal generated by the balancing network, and to use the sensed noise signal to improve a signal-to-noise ratio (SNR) of the RX path.
    Type: Application
    Filed: December 18, 2012
    Publication date: June 19, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Mohyee MIKHEMAR, Hooman DARABI
  • Publication number: 20140167989
    Abstract: A multi-lane analog-to-digital converter (ADC) is disclosed that is capable of compensating for one or more of its impairments such that its digital output accurately represents its analog input. The multi-lane ADC can compensate for unwanted phase offsets between multiple phases of a sampling clock used by the multi-lane ADC, unwanted bandwidth mismatches between lanes in the multi-lane ADC, and/or unwanted gain mismatches between the lanes in the multi-lane ADC to provide some examples.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 19, 2014
    Applicant: Broadcom Corporation
    Inventors: Frank van der GOES, Christopher Ward, Klaas Bult
  • Publication number: 20140169386
    Abstract: A system and method for enhanced auto-negotiation for NGBASE-T. Link partners can be configured to exchange advanced NGBASE-T configuration information such as type, profile, capability and mode information of the PHY in one or more next page messages. Determined cabling parameters that are reflective of communication channel characteristics can be used in the auto-negotiation selection of a configuration for NGBASE-T operation.
    Type: Application
    Filed: September 18, 2013
    Publication date: June 19, 2014
    Applicant: Broadcom Corporation
    Inventor: Wael William Diab
  • Publication number: 20140169424
    Abstract: A communication device is configured to perform interleaving of a modulation symbol sequence to generate an OFDM symbol. Some modulation symbols within the modulation symbol sequence that are separated by an interleaver depth may be transmitted via adjacently located sub-carriers, while other modulation symbols within the modulation sequence that are separated by more than the interleaver depth may also be transmitted via adjacently located sub-carriers. First adjacently located sub-carriers transmit first and second modulation symbols that are separated by the interleaver depth within the modulation sequence while second adjacently located sub-carriers transmit third and fourth modulation symbol that are separated by more than the interleaver depth within the modulation sequence. A communication device may be configured to adapt and switch between different operational parameters used for interleaving and/or deinterleaving at different times based on any desired considerations.
    Type: Application
    Filed: December 6, 2013
    Publication date: June 19, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Thomas J. Kolze, Tak K. Lee, Ba-Zhong Shen, Richard S. Prodan
  • Publication number: 20140169510
    Abstract: A circuit for a receiver with reconfigurable low-power or wideband operation may comprise one or more main signal paths each coupled to a first port and including a low-noise amplifier (LNA) configured to provide a radio frequency (RF) signal to a main mixer circuit. An auxiliary signal path may be coupled to a second port. The auxiliary signal path may include an auxiliary mixer configured to provide an on-chip matching input impedance that may match an impedance of the antenna. The first port may be coupled to an RF antenna through an off-chip matching circuit, when a low-power operation is desired. The first port may be coupled to the second port and to the RF antenna, when a wideband operation is desired.
    Type: Application
    Filed: December 18, 2012
    Publication date: June 19, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Mohyee MIKHEMAR, Hooman DARABI
  • Publication number: 20140169454
    Abstract: A video transmitter comprising a plurality of encoders may be operable to determine, for a transport stream, a constant overall number of bits per time interval corresponding to a frame in the transport stream. For each time interval corresponding to a start and an end of encoding of each of frames using each of the encoders, the video transmitter may allocate a target number of bits to each of the frames to achieve the constant overall number of bits. The allocation of the target number of bits may be based on frame types of the frames and CODEC types of the encoders, where the allocated target number of bits for each of the frames meets buffer overflow/underflow requirements associated with each of the encoders. A quantization parameter (QP) may be calculated and adjusted at each of one or more layers for generating an actual number of bits during encoding.
    Type: Application
    Filed: February 21, 2014
    Publication date: June 19, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Gheorghe BERBECEL, Xuemin CHEN
  • Publication number: 20140173384
    Abstract: Aspects of a method and system for encoding in 100G-KR networking are described. In one example embodiment, a coding method uses certain forward error correcting codes based on a given transcoding method and delivers the codes according to burst interleaving. In another example, a coding method includes receiving source data from a plurality of physical lanes, combining data from the physical lanes to generate a block, transcoding the block, and encoding a data stream including the transcoded block.
    Type: Application
    Filed: February 21, 2014
    Publication date: June 19, 2014
    Applicant: Broadcom Corporation
    Inventors: Zhongfeng Wang, Hongtao Jiang, Chung-Jue Chen, Kang Xiao