Patents Assigned to Broadcom
  • Patent number: 7414410
    Abstract: A system and method are used to determine connectivity and/or cable faults of a cable. A signal transmitting and receiving system is coupled to the cable. An analog-to-digital converter (ADC) coupled to the signal transmitting and receiving system. A TDR system coupled to the ADC and a memory, and a controlling system coupled to at least one of the ADC, the TDR system, and the signal receiving and transmitting system. The controlling system includes a controller and one or more state machines that are used to control the TDR system.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: August 19, 2008
    Assignee: Broadcom Corporation
    Inventors: Art Pharn, Peiqing Wang, Siavash Fallahi
  • Patent number: 7415548
    Abstract: An apparatus and a method for routing data in a radio data communication system having one or more host computers, one or more intermediate base stations, and one or more RF terminals organizes the intermediate base stations into an optimal spanning-tree network to control the routing of data to and from the RF terminals and the host computer efficiently and dynamically. Communication between the host computer and the RF terminals is achieved by using the network of intermediate base stations to transmit the data.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: August 19, 2008
    Assignee: Broadcom Corporation
    Inventors: Ronald L. Mahany, Robert C. Meier, Ronald E. Luse
  • Publication number: 20080194219
    Abstract: An FM receiver including an FM antenna that receives continuous wavelength signals, where the FM receiver is coupled to the FM antenna and operable to alter a center frequency of a gain profile of the FM antenna. The FM receiver includes a low noise amplifier module that is coupled to amplify the continuous wavelength signal to produce an amplified RF signal therefrom. A down conversion module is coupled to mix the amplified RF signal with a local oscillation to produce an information signal. A filter module is coupled to filter the information signal to produce a filtered information signal. A demodulation module is coupled to capture audio information from the filtered information signal. A signal monitoring module is coupled to monitor the FM signal quality of a received continuous wavelength signal. The signal monitoring module produces a signal quality indication therefrom.
    Type: Application
    Filed: August 8, 2007
    Publication date: August 14, 2008
    Applicant: Broadcom Corporation
    Inventors: Jesus Alfonso Castaneda, Seema B. Anand, Maryam Rofougaran, Ahmadreza (Reza) Rofougaran
  • Publication number: 20080194216
    Abstract: A voice data and RF integrated circuit (IC) includes an RF transmitter, that generates an RF signal to a power amplifier module. A memory module stores a least one application as a plurality of operational instructions, the at least one application having a plurality of modes that each correspond to one of a plurality of use characteristics. A processing module executes the plurality of operational instructions and determines a selected one of the plurality of modes based on current use characteristics of the at least one application, and generates at least one control signal based on the selected one of the plurality of modes. A bias control generator generates a bias control signal in response to the at least one control signal, to control the biasing of the power amplifier module.
    Type: Application
    Filed: February 8, 2007
    Publication date: August 14, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080192378
    Abstract: A data-dependent noise predictive (DDNP) adaptation module operable to support Viterbi branch metric calculations within a hard disk drive (HDD) controller is provided. This DDNP adaptation module includes a DDNP filter tap coefficient adaptation module, a DDNP filter gain scaling module, and a DDNP bias compensation module. The combination of the DDNP filter tap coefficient adaptation module, the DDNP filter gain scaling module, and the DDNP bias compensation module is operable to receive an error signal and a NRZ pattern and produce tap coefficients. A whitened error signal calculation module coupled to the DDNP filter tap coefficient adaptation module, the DDNP filter gain scaling module, and the DDNP bias compensation module, the whitened error signal calculation module operable to calculate a whitened error signal based on the error signal, NRZ pattern, and tap coefficients. This whitened error signal is used to support the Viterbi branch metric calculations.
    Type: Application
    Filed: January 31, 2008
    Publication date: August 14, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: William Gene Bliss, Xiaotong Lin
  • Publication number: 20080192816
    Abstract: An equalizer is disclosed that compensates for non-linear effects resulting from a transmitter, a receiver, and/or a communication channel in a communication system. A non-linear decision feedback equalizer compensates for the non-linear effects impressed onto a received symbol by selecting between equalization coefficients based upon a previous received symbol. The received symbol may be represented in form of logic signals based on the binary number system. The two symbols most commonly chosen to represent the two logic values taken on by binary symbols are binary zero and binary one. When the previous received symbol is a binary zero, the non-linear decision feedback equalizer selects an equalization coefficient corresponding to binary zero to compensate for the non-linear effects impressed onto the received symbol.
    Type: Application
    Filed: March 29, 2007
    Publication date: August 14, 2008
    Applicant: Broadcom Corporation
    Inventor: Afshin Momtaz
  • Publication number: 20080191313
    Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.
    Type: Application
    Filed: March 25, 2008
    Publication date: August 14, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran, Shahla Khorram
  • Publication number: 20080194302
    Abstract: A mobile phone with a FM antenna structure having improved FM performance in a mobile phone. The mobile phone includes a printed FM antenna having a planar structure less than a planar area of the mobile phone, a conductive layer providing a ground plane to the printed FM antenna, the conductive adjacent the printed FM antenna in an electrostatic field relation; and a battery having a planar surface positioned adjacent an opposite side of the conductive layer. The planar structure of the printed FM antenna and the planar surface of the battery are substantially parallel to each other in a spaced-apart relation improving the FM performance of the printed FM antenna.
    Type: Application
    Filed: May 16, 2007
    Publication date: August 14, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Jesus Alfonso Castaneda, Seema B. Anand
  • Publication number: 20080195749
    Abstract: Methods, systems and computer program products to implement extensions of the Media Transport Protocol (MTP) are provided herein. The methods include opening a session between an initiator and a responder, exchanging one or more of device and system information and sending one of an operation or event based on control and status information. The operation includes one or more of a dataset, response code, operation parameter and response parameter. The methods also include sending or receiving one of an operation or event based on remote URL information. The operation includes one or more of a dataset, response code, operation parameter and response parameter. These extensions may be in the form of one or more of an operation, an event, a dataset or property code.
    Type: Application
    Filed: January 30, 2008
    Publication date: August 14, 2008
    Applicant: Broadcom Corporation
    Inventor: Scott Krig
  • Publication number: 20080192807
    Abstract: An FM receiver including an FM antenna that receives continuous wavelength signals, where the FM receiver is coupled to the FM antenna and operable to alter a center frequency of a gain profile of the FM antenna. The FM receiver includes a low noise amplifier module that is coupled to amplify the continuous wavelength signal to produce an amplified RF signal therefrom. A down conversion module is coupled to mix the amplified RF signal with a local oscillation to produce an information signal. A filter module is coupled to filter the information signal to produce a filtered information signal. A demodulation module is coupled to capture audio information from the filtered information signal. A signal monitoring module is coupled to monitor the FM signal quality of a received continuous wavelength signal. The signal monitoring module produces a signal quality indication therefrom.
    Type: Application
    Filed: September 21, 2007
    Publication date: August 14, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Jesus Alfonso Castaneda, Seema B. Anand, Maryam Rofougaran, Ahmadreza (Reza) Rofougaran
  • Publication number: 20080194288
    Abstract: An integrated circuit and/or device is provided that supports wireless communications. The integrated circuit includes wireless communication circuitry, frequency modulated (FM) receiver circuitry, and FM antenna control circuitry. The communication circuitry is coupled to convert an inbound radio frequency (RF) signal into an inbound data signal and to convert an outbound data signal into an outbound RF signal. The integrated circuit also includes FM receiver circuitry that is coupled to convert an inbound continuous wavelength signal into an inbound FM data signal. FM antenna control circuitry is coupled to the FM receiver circuitry for producing control signals to control a center frequency of a gain profile of an FM antenna.
    Type: Application
    Filed: May 16, 2007
    Publication date: August 14, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Jesus Alfonso Castaneda, Seema B. Anand, Maryam Rofougaran, Ahmadreza (Reza) Rofougaran
  • Publication number: 20080194212
    Abstract: A voice, data and RF integrated circuit (IC) includes an RF transmitter that generates a transmit signal from outbound data. An RF receiver that generates inbound data from a received signal. A processing module generates a control signal to select either a receive mode or a transmit mode for the RF transmitter and the RF receiver, the control signal having a first value when the receive mode is selected and a second value when the transmit mode is selected. A transmit/receive switch couples the transmit signal to an antenna when the control signal has a second value, and produces the received signal based on an inbound RF signal to the antenna when the control signal has a first value, wherein the transmit/receive switch includes an on-chip microelectromechanical switch.
    Type: Application
    Filed: February 8, 2007
    Publication date: August 14, 2008
    Applicant: Broadcom Corporation a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080194300
    Abstract: A voice data and RF integrated circuit (IC) receives at least one power status signal indicating an inductive power status of an off-chip inductive power module, the inductive power status including an inductive power ready state, and the at least one power status signal further indicating a battery power status of a battery. A selected one of a plurality of power modes is determined based on the at least one power status signal. A power mode signal is generated based on the selected one of the plurality of power modes. A plurality of power supply signals are generated based on the power mode signal.
    Type: Application
    Filed: February 8, 2007
    Publication date: August 14, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080195311
    Abstract: A wireless terminal displays its location and navigation information (map segment) on its display. The wireless terminal accesses a Global Positioning System (GPS) receiver of the wireless terminal to determine its location coordinates. The wireless terminal determines a maximum data size for navigation information to be downloaded. The wireless terminal sends a navigation information download request to a map server via a supporting wireless network infrastructure that includes the location coordinates and the maximum data size. The wireless terminal receives navigation information that has a data size no greater than the maximum data size and displays the navigation information on the display. The wireless terminal may display a map segment and an icon representing the wireless terminal at a location corresponding to the location coordinates of the wireless terminal with respect to the map segment. The wireless terminal may download a premises map from a premises map server.
    Type: Application
    Filed: April 16, 2008
    Publication date: August 14, 2008
    Applicant: BROADCOM CORPORATION
    Inventors: Jeyhan Karaoguz, James D. Bennett
  • Patent number: 7411959
    Abstract: Aspects of the invention may be found in a method and system for handling out-of-order frames. In one embodiment, a method includes, for example, one or more of the following: receiving an out-of-order frame via a network interface card (NIC); placing data of the out-of-order frame in a host memory; and managing information relating to one or more holes in a receive window.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: August 12, 2008
    Assignee: Broadcom Corporation
    Inventor: Uri Elzur
  • Patent number: 7412096
    Abstract: A system and method that determines the direction of an edge in a video image using a gradient of the edge in a first direction and a gradient of the edge in a second direction. The system uses the sign of the product of the gradient in the first direction and the gradient in the second direction along with a ratio of multiples of the two gradients to determine the direction of the edge. The direction may correspond to an angle range, where the ratio of the gradients corresponds to a trigonometric function of the angle of the edge.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: August 12, 2008
    Assignee: Broadcom Corporation
    Inventors: Darren Neuman, Patrick Law
  • Patent number: 7411523
    Abstract: Disclosed herein is a method and system to reduce the area and power dissipation in digital filters or multipliers Compared to radix-4 Booth coding the proposed method reduces the number of partial products by one, if the input signal has certain limits on its range. One exemplary application is echo cancellation in a full duplex pulse amplitude modulation system with 10 levels (PAM-10). Echo cancellation may be achieved by calculating a digital replica of the echo from the transmission channel. The replica signal may be calculated in a finite impulse response (FIR) filter, which multiplies the transmitted signal with estimates of the echo coefficients of the transmission channel The replica signal may be subtracted from the received signal to create an echo-free receive signal. The disclosed method may reduce the number of partial products between the PAM-10 transmit signal and each echo coefficient from three, when radix-4 Booth coding is used, to two.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: August 12, 2008
    Assignee: Broadcom Corporation
    Inventor: Christian Lutkemeyer
  • Patent number: 7412222
    Abstract: A direct conversion radio frequency (RF) tuner includes a mixer generating I and Q quadrature components. A phase detection circuit generates a phase error measurement between the I quadrature component and the Q quadrature component. A phase correction circuit corrects a phase of the Q component based on the phase error measurement, and outputs a phase-corrected Q quadrature component. An I quadrature component gain control circuit receives the I quadrature component and outputting an amplitude corrected I quadrature component. A Q quadrature component gain control circuit receives the phase corrected Q quadrature component and outputs an amplitude corrected Q quadrature component.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: August 12, 2008
    Assignee: Broadcom Corporation
    Inventor: Ramon A Gomez
  • Patent number: 7411846
    Abstract: In a memory module having a designated group of memory cells assigned to represent a logical portion of the memory structure, a memory redundancy circuit having a redundant group of memory cells; and a redundancy controller coupled with the designated group and the redundant group. The redundancy controller, which can include a redundancy decoder, assigns the redundant group to the logical portion of the memory structure in response to a preselected memory group condition, e.g., a “FAILED” memory group condition. The redundancy controller also can include selectable switches, for example, fuses, which can encode the preselected memory group condition. The designated group of memory cells and the redundant group of memory cells can be a memory row, a memory column, a preselected portion of a memory module, a selectable portion of a memory module, a memory module, or a combination thereof.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: August 12, 2008
    Assignee: Broadcom Corporation
    Inventor: Esin Terzioglu
  • Patent number: 7411381
    Abstract: According to one general aspect, an apparatus includes a first resistor in a first current path of a resistor-capacitor (RC) circuit, the resistor connected to a power source. A variable capacitor is included in a second current path of the RC circuit and operably connected to the power source and a virtual ground generator. A comparison circuit is configured to make a determination regarding a voltage VR across the resistor to a ground relative to a voltage VC across the capacitor to a virtual ground from the virtual ground generator. A control circuit is configured to make an adjustment of a value of the variable capacitor, based on the determination.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: August 12, 2008
    Assignee: Broadcom Corporation
    Inventors: Yuyu Chang, Hooman Darabi