Patents by Inventor Raja Pullela

Raja Pullela has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10681412
    Abstract: An electronic device may be operable to sample a signal during an analog-to-digital conversion using an analog-to-digital converter in the electronic device, and the signal may comprise a wide bandwidth and a plurality of channels. The electronic device may adaptively change a sample rate of the sampling to move aliasing out of a region of one or more desired channels of the plurality of channels. The electronic device may change the sample rate using a variable oscillator in the electronic device. The change of the sample rate may comprise, for example, increasing or decreasing the sample rate by a particular percentage. In response to the change of the sample rate, the electronic device may perform, using a variable rate interpolator in the electronic device, variable rate interpolation. The variable rate interpolator may comprise, for example, a finite impulse response filter.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: June 9, 2020
    Assignee: MaxLinear, Inc.
    Inventors: Raja Pullela, Glenn Chang
  • Patent number: 10404304
    Abstract: Methods and systems for a baseband cross-bar may comprise receiving one or more radio frequency (RF) signals in a wireless communication device via antennas coupled to a plurality of receiver paths in the wireless device. The received RF signals may be converted to baseband frequencies. One or more of the down-converted signals may be coupled to receiver paths utilizing a baseband cross-bar. The baseband cross-bar may comprise a plurality of switches, which may comprise CMOS transistors. In-phase and quadrature signals may be processed in the one or more of the plurality of receiver paths. The one or more RF signals comprise cellular signals and/or global navigation satellite signals. A single-ended received RF signal may be converted to a differential signal in one or more of the plurality of receiver paths. The baseband cross-bar may be controlled utilizing a reduced instruction set computing (RISC) processor.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: September 3, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Raja Pullela, Sheng Ye, Morten Damgaard
  • Patent number: 10396850
    Abstract: A microwave backhaul system may comprise a monolithic integrated circuit comprising an on-chip transceiver, digital baseband processing circuitry, and auxiliary interface circuitry. The on-chip transceiver may process a microwave signal from an antenna element to generate a first pair of quadrature baseband signals and convey the first pair of phase-quadrature baseband signals to the digital baseband processing circuitry. The auxiliary interface circuitry may receive one or more auxiliary signals from a source that is external to the monolithic integrated circuit and convey the one or more auxiliary signals to the digital baseband processing circuitry. The digital baseband processing circuitry may be operable to process signals to generate one or more second pairs of phase-quadrature digital baseband signals.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: August 27, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Kishore Seendripu, Raja Pullela, Madhukar Reddy, Timothy Gallagher
  • Patent number: 10326414
    Abstract: Systems and methods are provided for dynamically biasing power amplifiers. A power amplifier (PA) that amplifies an input signal may be controlled based on processing of the input signal. The controlling may include adjusting biasing applied to the power amplifier (PA). The processing of the input signal may include applying clipping to the input signal and determining one or more parameters of the input signal. The biasing applied to the power amplifier (PA) may be adjusted based on the one or more parameters of the input signal. The clipping may be configured such that signals applied to positive and negative sides of the power amplifier (PA) are not differential.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: June 18, 2019
    Assignee: MAXLINEAR, INC.
    Inventors: Rahul Bhatia, Timothy Gallagher, Raja Pullela, Sridhar Ramesh
  • Patent number: 10277955
    Abstract: A signal receiver chip may be configured to receive a satellite signal, and when the satellite signal is partially-processed off-chip, to bypass at least a portion of processing functions applied in the signal receiver chip during processing of satellite signals. The bypassed processing functions may comprise or correspond to signal band conversions. The satellite signal chip may generate an output signal, corresponding to the satellite signal, with the output signal being configured for communication to a peer device (e.g., satellite STB). The output signal may be generated and/or configured such that to enable distributing content carried in the output signal to a plurality of client devices in a local network serviced by the peer device. The signal receiver chip may combine a plurality of portions, corresponding to a plurality of satellite signals, into the output signal.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: April 30, 2019
    Assignee: MAXLINEAR, INC.
    Inventors: Raja Pullela, Glenn Chang, Curtis Ling
  • Patent number: 10263632
    Abstract: Methods and systems are provided for gain control during communications. A first electronic device may communicated data to a second electronic device; may monitor conditions and/or parameters affecting estimated reception performance at the second electronic device; and may communicated to the second electronic device, via a connection separate from and different than a connection used in communicating the data, information relating to the monitored conditions, to enable adjusting functions relating to reception of the data at the second electronic device. Based on the received information, at least one reception related function in the second electronic device may be controlled. The controlling may include determining, based on the received information, adjustments to the at least one reception related function or to a related parameter. The at least one reception related function may include applying gain to at least a portion of signals received by the second electronic device.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: April 16, 2019
    Assignee: MAXLINEAR, INC.
    Inventors: Raja Pullela, Curtis Ling
  • Patent number: 10256898
    Abstract: Methods and systems are provided for guard band detection and frequency offset detection. For each of a plurality of downconverted signals, frequency related information associated with one or more corresponding circuits used in obtaining the plurality of downconverted signals may be determined; and based on the determined frequency related information, one or both of a band stacking operation and a channel stacking operation may be performed. During the band stacking operation, frequency bands are not stacked on each other or stacked frequency bands do not overlap. During the channel stacking operation, channels are not stacked on each other or stacked channels do not overlap. The frequency related information may be determined based on predefined frequency related parameters associated with the corresponding circuits. Frequency corrections may be performed, on output signals corresponding to the band stacking operation and/or the channel stacking operation, based on the frequency related information.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: April 9, 2019
    Assignee: MAXLINEAR, INC.
    Inventors: Raja Pullela, Glenn Chang, Sridhar Ramesh
  • Patent number: 10230424
    Abstract: A monolithic integrated circuit for use in a microwave backhaul system may comprise a plurality of microwave transceivers and outdoor-unit to indoor-unit (ODU/IDU) interface circuitry. The monolithic integrated circuit may be configurable into an all-outdoor configuration in which the ODU/IDU interface circuitry is disabled. The monolithic integrated circuit may be configurable into a split-indoor-and-outdoor configuration in which the ODU/IDU interface circuitry is enabled to communicate signals between an outdoor unit of the microwave backhaul system and an indoor unit of the microwave backhaul system. While the monolithic integrated circuit is configured in the split-indoor-and-outdoor configuration, the ODU/IDU interface circuitry may be configurable to operate in at least a non-stacking mode and a stacking mode.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: March 12, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Curtis Ling, Kishore Seendripu, Raja Pullela, Madhukar Reddy, Timothy Gallagher
  • Patent number: 10224948
    Abstract: Aspects of a method and system for a successive approximation analog-to-digital converter with dynamic search algorithms are provided. In some embodiments, a successive approximation analog-to-digital converter includes a digital-to-analog converter, a comparator, and a search and decode logice modules which cooperate to generate a digital output code representative of the analog input voltage based on a dynamic search algorithm. The dynamic search algorithms may alter a sequence of reference voltages used to successively approximate the analog input voltage based on one or more characteristics of the analog input voltage.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: March 5, 2019
    Assignee: MAXLINEAR, INC.
    Inventors: Raja Pullela, Curtis Ling
  • Publication number: 20190068227
    Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.
    Type: Application
    Filed: October 26, 2018
    Publication date: February 28, 2019
    Inventors: Subramanian Anantharaman Chandrasekarapuram, Anand Anandakumar, Stephane Laurent-Michel, Sheng Ye, Raja Pullela, Glenn Chang, Vamsi Paidi
  • Patent number: 10211936
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: February 19, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shantha Murthy Prem Swaroop, Curtis Ling, Vamsi Paidi, Wenjian Chen
  • Patent number: 10187096
    Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: January 22, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Subramanian Anantharaman Chandrasekarapuram, Anand Anandakumar, Stephane Laurent-Michel, Sheng Ye, Raja Pullela, Glenn Chang, Vamsi Paidi
  • Patent number: 10181869
    Abstract: Methods and systems for a configurable low-noise amplifier with programmable band-selection filters may comprise a receiver with a low-noise amplifier (LNA) with first and second input terminals and differential output terminals; a low pass filter operably coupled to the LNA; a high pass filter operably coupled to the second input terminal of the LNA; and a signal source input coupled to the low pass filter and the high pass filter. The LNA may be operable to receive signals in a pass band of the high pass filter and a pass band of the low pass filter. The receiver may be operable to amplify input signals in the pass band of a first filter but not signals in the pass band of the second filter by operably coupling the second to ground.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: January 15, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Raja Pullela, Wenjian Chen, Vamsi Paidi
  • Publication number: 20180367178
    Abstract: Methods and systems for a baseband cross-bar may comprise receiving one or more radio frequency (RF) signals in a wireless communication device via antennas coupled to a plurality of receiver paths in the wireless device. The received RF signals may be converted to baseband frequencies. One or more of the down-converted signals may be coupled to receiver paths utilizing a baseband cross-bar. The baseband cross-bar may comprise a plurality of switches, which may comprise CMOS transistors. In-phase and quadrature signals may be processed in the one or more of the plurality of receiver paths. The one or more RF signals comprise cellular signals and/or global navigation satellite signals. A single-ended received RF signal may be converted to a differential signal in one or more of the plurality of receiver paths. The baseband cross-bar may be controlled utilizing a reduced instruction set computing (RISC) processor.
    Type: Application
    Filed: August 23, 2018
    Publication date: December 20, 2018
    Inventors: Raja Pullela, Sheng Ye, Morten Damgaard
  • Patent number: 10148300
    Abstract: Methods and systems for a configurable low-noise amplifier with programmable band-selection filters may comprise a receiver with a low-noise amplifier (LNA) with first and second input terminals and differential output terminals; a low pass filter operably coupled to the LNA; a high pass filter operably coupled to the second input terminal of the LNA; and a signal source input coupled to the low pass filter and the high pass filter. The LNA may be operable to receive signals in a pass band of the high pass filter and a pass band of the low pass filter. The receiver may be operable to amplify input signals in the pass band of a first filter but not signals in the pass band of the second filter by operably coupling the second to ground.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: December 4, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Raja Pullela, Wenjian Chen, Vamsi Paidi
  • Publication number: 20180248561
    Abstract: Aspects of a method and system for a successive approximation analog-to-digital converter with dynamic search algorithms are provided. In some embodiments, a successive approximation analog-to-digital converter includes a digital-to-analog converter, a comparator, and a search and decode logice modules which cooperate to generate a digital output code representative of the analog input voltage based on a dynamic search algorithm. The dynamic search algorithms may alter a sequence of reference voltages used to successively approximate the analog input voltage based on one or more characteristics of the analog input voltage.
    Type: Application
    Filed: April 27, 2018
    Publication date: August 30, 2018
    Inventors: Raja Pullela, Curtis Ling
  • Patent number: 10063266
    Abstract: Methods and systems for a baseband cross-bar may comprise receiving one or more radio frequency (RF) signals in a wireless communication device via antennas coupled to a plurality of receiver paths in the wireless device. The received RF signals may be converted to baseband frequencies. One or more of the down-converted signals may be coupled to receiver paths utilizing a baseband cross-bar. The baseband cross-bar may comprise a plurality of switches, which may comprise CMOS transistors. In-phase and quadrature signals may be processed in the one or more of the plurality of receiver paths. The one or more RF signals comprise cellular signals and/or global navigation satellite signals. A single-ended received RF signal may be converted to a differential signal in one or more of the plurality of receiver paths. The baseband cross-bar may be controlled utilizing a reduced instruction set computing (RISC) processor.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: August 28, 2018
    Assignee: Maxlinear, Inc.
    Inventors: Raja Pullela, Sheng Ye, Morten Damgaard
  • Publication number: 20180191452
    Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
    Type: Application
    Filed: February 28, 2018
    Publication date: July 5, 2018
    Inventors: Glenn Chang, Raja Pullela, Madhukar Reddy, Timothy Gallagher, Shantha Murthy Prem Swaroop, Curtis Ling, Vamsi Paidi, Wenjian Chen
  • Publication number: 20180183492
    Abstract: A microwave backhaul system may comprise a monolithic integrated circuit comprising an on-chip transceiver, digital baseband processing circuitry, and auxiliary interface circuitry. The on-chip transceiver may process a microwave signal from an antenna element to generate a first pair of quadrature baseband signals and convey the first pair of phase-quadrature baseband signals to the digital baseband processing circuitry. The auxiliary interface circuitry may receive one or more auxiliary signals from a source that is external to the monolithic integrated circuit and convey the one or more auxiliary signals to the digital baseband processing circuitry. The digital baseband processing circuitry may be operable to process signals to generate one or more second pairs of phase-quadrature digital baseband signals.
    Type: Application
    Filed: February 26, 2018
    Publication date: June 28, 2018
    Inventors: Kishore Seendripu, Raja Pullela, Madhukar Reddy, Timothy Gallagher
  • Publication number: 20180159572
    Abstract: Methods and systems for a configurable low-noise amplifier with programmable band-selection filters may comprise a receiver with a low-noise amplifier (LNA) with first and second input terminals and differential output terminals; a low pass filter operably coupled to the LNA; a high pass filter operably coupled to the second input terminal of the LNA; and a signal source input coupled to the low pass filter and the high pass filter. The LNA may be operable to receive signals in a pass band of the high pass filter and a pass band of the low pass filter. The receiver may be operable to amplify input signals in the pass band of a first filter but not signals in the pass band of the second filter by operably coupling the second to ground.
    Type: Application
    Filed: February 2, 2018
    Publication date: June 7, 2018
    Inventors: Raja Pullela, Wenjian Chen, Vamsi Paidi