Patents Assigned to MaxLinear, Inc.
  • Patent number: 10404260
    Abstract: Methods and systems for a sampled loop filter in a phase locked loop (PLL) may comprise a phase locked loop (PLL) comprising a phase frequency detector, a sampled loop filter comprising a plurality of capacitors and at least one switch, a plurality of voltage controlled oscillators (VCOs) coupled to said sampled loop filter, and a frequency divider. The PLL generates at least one clock signal, and the sampled loop filter samples an output signal from the phase frequency detector when an average of charge provided to a first of the plurality of capacitors in the sampled loop filter is zero. The frequency divider may be a fractional-N divider. A second switch in said sampled loop filter may have switching times that are non-overlapping with switching times of the at least one switch. Capacitors may be coupled to ground from each terminal of the second switch.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: September 3, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Sangeetha Gopalakrishnan, Sheng Ye, Vamsi Paidi, Raghava Manas Bachu
  • Patent number: 10404497
    Abstract: An electronic receiver may generate a differential detection sequence based on a received symbol sequence and based on a m-symbol delayed version of the received symbol sequence, where in is an integer greater than 1. The particular differential detection sequence may be a result of an element-by-element multiplication of the particular received symbol sequence and the conjugate of an in-symbol delayed version of the particular received symbol sequence. The receiver may calculate differential decision metrics based on the differential detection sequence and based on a set of differential symbol sequences generated from the set of possible transmitted symbol sequences. The receiver may generate a decision as to which of a set of possible transmitted symbol sequences resulted in the received symbol sequence, where the decision is based on the differential decision metrics and the set of possible transmitted symbols sequences.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: September 3, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Ioannis Spyropoulos, Anand Anandakumar
  • 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: 10404503
    Abstract: Aspects of methods and systems for frequency multiplexing suitable for Data Over Cable Service Interface Specification (DOCSIS) are provided. A system for multiplexing signals according to frequency comprises a DOCSIS port interface, an upstream interface, a downstream interface, and a circulator subsystem. The DOCSIS port interface comprises a plurality of channel filters. The upstream interface is operably coupled to a first channel filter of the plurality of channel filters, and the downstream interface is operably coupled to a second channel filter of the plurality of channel filters. The circulator subsystem is able to direct a first signal from the upstream interface to the DOCSIS port interface and is able to direct a second signal from the DOCSIS port interface to the downstream interface.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: September 3, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Paul Chominski, Sridhar Ramesh
  • 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: 10389449
    Abstract: Aspects of a method and system for feedback during optical communications are provided. In one embodiment, a system for optical communications comprises a predistortion module, a feedback subsystem, a transmit optical subsystem, and an external modulator. The predistortion module is operable to receive an input digital signal and modify the input digital signal to produce a digital predistorted signal. The transmit optical subsystem is operable to generate an optical signal from the digital predistorted signal. The modification of the input digital signal is dynamically controlled by the feedback subsystem according to one or more characteristics of the optical signal as determined by the feedback subsystem. The amplitude of the external modulator output is also dynamically controlled by the feedback subsystem.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: August 20, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Curtis Ling, Anand Anandakumar, Ioannis Spyropoulos
  • Patent number: 10389404
    Abstract: Aspects of methods and systems for PAPR reduction in a microwave backhaul outdoor unit are provided.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: August 20, 2019
    Assignee: MAXLINEAR, INC.
    Inventors: Stephane Laurent-Michel, Raghuraman Mariappan
  • Patent number: 10374633
    Abstract: A Low-Density Parity-Check (LDPC) decoder and a method for LDPC decoding are provided. The LDPC decoder receives a soft-decision input codeword block in which the probability of a bit being a “0” or a “1” is represented as a log-likelihood ratio (LLR). During LDPC decoding, a sequence of hardware logic units iteratively updates the soft-decision input codeword block until a valid codeword is found or a maximum number of decoding iterations is reached. Each hardware logic unit comprises a check node (CN) update logic unit and a variable node (VN) update logic unit. The CN update logic units are coupled via a closed CN path, and the VN update logic units are coupled via a closed VN path. Aspects of this LDPC decoder alleviate the global routing and energy efficiency challenges of traditional LDPC decoders, to enable multi-rate, multi-Gb/s decoding without compromising error correction performance in next-generation systems and future CMOS technology nodes.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: August 6, 2019
    Assignee: MAXLINEAR, INC.
    Inventors: Mario Milicevic, Glenn Gulak
  • Patent number: 10374879
    Abstract: Systems and methods for efficiently establishing beacon transmission power, for example in networks in which beacon transmission responsibility can be passed between nodes. As a non-limiting example, various aspects of the present disclosure provide systems and methods for establishing beacon transmission power in a node that has received beacon transmission responsibility in a network, for example by hand-off, failover, etc.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: August 6, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Yoav Hebron, Na Chen, Ronald Lee
  • Patent number: 10367515
    Abstract: A digital-to-analog converter (DAC) controller system may be configured for controlling switching in an associated digital-to-analog converter (DAC), based on a plurality of system inputs that include at least a first system input corresponding to an input applied to the DAC for controlling switching therein, and a second system input that includes a reference control signal. The DAC controller system may include a logic gate circuit that generates a gate output based on two gate inputs that include the first system input and an input set based on the second system input; and a plurality of timing circuits that generate timing outputs for controlling timing of switching in the DAC, which include at least one timing circuit that generates a timing output based on the gate output, with the timing output configured for application in conjunction with and for adjusting a timing output of another timing circuit.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: July 30, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Gaurav Chandra, Tao Zeng, Shantha Murthy Prem Swaroop, Jianyu Zhu
  • Patent number: 10361670
    Abstract: An automatic gain control loop disposed in a receiver is adapted to compensate for varying levels of out of band interference sources by adaptively controlling the gain distribution throughout the receive signal path. One or more intermediate received signal strength indicator (RSSI) detectors are used to determine a corresponding intermediate signal level. The output of each RSSI detector is coupled to an associated comparator that compares the intermediate RSSI value against a corresponding threshold. The take over point (TOP) for gain stages is adjusted based in part on the comparator output values. The TOP for each of a plurality of gain stages may be adjusted in discrete steps or continuously.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: July 23, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Curtis Ling, Madhukar Reddy, John Wetherell
  • Patent number: 10355903
    Abstract: Systems and methods are provided for peak to average power ratio (PAPR) reduction in multichannel transmissions. A plurality of frequency-domain symbols may be generated and assigned to a plurality of subcarriers associated with a multichannel transmission. The subcarriers may be assigned to a plurality of channels used for the multichannel transmission, with a number of the channels being different than a number of the subcarriers. A plurality of time-domain signals corresponding to the plurality of channels may be generated, and an adjustment may be applied to at least one time-domain signal, to generate a corresponding adjusted time-domain signal. The adjustment may be configured based on one or more characteristic associated with at least two of the frequency-domain symbols. Handling related information may be communicated form the transmit-side to the receive-side, such as using spare carriers, to enable handling an output corresponding to the plurality of time-domain signals.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: July 16, 2019
    Assignee: MAXLINEAR, INC.
    Inventor: Sridhar Ramesh
  • Patent number: 10355686
    Abstract: Methods and systems for reliable bootstrapping switches may comprise sampling a received signal with a bootstrapping switch, where the bootstrapping switch comprises a switching metal-oxide semiconductor (MOS) transistor having a pull-down path coupled to a gate terminal of the switching MOS transistor, wherein: source terminals of both a diode-connected transistor and a second MOS transistor are coupled to the gate terminal of the switching MOS transistor; drain terminals of both the diode-connected transistor and the second MOS transistor are coupled to a source terminal of a third MOS transistor, the third MOS transistor coupled in series with a fourth MOS transistor; and a drain terminal of the fourth MOS transistor is coupled to ground. The third and fourth MOS transistors may be in series with the second MOS transistor. A gate terminal of the fourth transistor may be switched from ground to a supply voltage to activate the pull-down path.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: July 16, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Yongjian Tang, Xuefeng Chen
  • Patent number: 10356584
    Abstract: A wireless communication device detects presence of a peer wireless communication device within operating range and pairs with the detected peer wireless communication device. The wireless communication device and the peer wireless communication device are operable to communicate wireless broadband signals at a power level that is below a spurious emissions mask using broadband near field communication with full spectrum capture. The pairing may be controlled based on the determined distance between the wireless communication device and the peer wireless communication device. A determination is made whether to utilize security to enable the pairing based on the determined distance. A range of the communicated wireless broadband signals may be limited to provide secure communication between a plurality of wireless communication devices that communicate utilizing the wireless broadband signals. Content is shared among the plurality of wireless communication devices based on the limiting.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: July 16, 2019
    Assignee: MAXLINEAR, INC.
    Inventors: Curtis Ling, Timothy Gallagher
  • Patent number: 10356585
    Abstract: A wireless communication device (WCD) generates and transmits wireless broadband signals (WBS) at a power level that is below a spurious emissions mask such that the transmitted WBS occupy a designated frequency spectrum band. The WCD transmits duty cycle bursts of the WBS and determines range, position and/or movement based on the transmitted burst of the WBS. A bandwidth of the wireless broadband signals may occupy approximately 800 MHz within a range of 0 Hz to 1 GHz. The transmit power utilized for transmitting the WBS may be spread over a bandwidth of approximately 300 MHz within the 800 MHz bandwidth. The spreading results in a power spectral density of the transmitted WBS approximating thermal noise at a distance of approximately 3 meters. A course range may be determined utilizing wireless signals other than the transmitted bursts and a fine range may be determined utilizing the transmitted bursts.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: July 16, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Curtis Ling, Timothy Gallagher
  • Patent number: 10355725
    Abstract: Systems and methods are provided for handling jitter improvement in transmitters. During processing of input data for serial transmission, it may be determined if jitter may occur, and when jitter occurs one or more adjustments may be determined, based on dummy data, to reduce jitter in an output corresponding to the input data. The one or more adjustments may then be applied during processing of the input data, to reduce jitter in a serial output corresponding to the input data. The dummy data may be generated based on the input data. The dummy data may be configured such that it may generate corresponding dummy current pulses which may be used in controlling supply variations during generation of the serial output. The use of the dummy data may be selectively turned on or off.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: July 16, 2019
    Assignee: MAXLINEAR, INC.
    Inventors: Amir Hadji-Abdolhamid, Sheng Ye
  • Patent number: 10348409
    Abstract: Methods and systems for continuous gain control in a feedback transimpedance amplifier (TIA) may include: in a TIA including a gain stage, a feedback resistance for the gain stage, a current sense resistor, and a feedback current control circuit: receiving an input current at an input of the gain stage: directing a current through the current sense resistor to the feedback current control circuit, and generating an output voltage proportional to the input current and a gain of the TIA. The gain may be configured by providing a proportion (?) of the current through the feedback current control circuit to the input of the gain stage. The proportion ? of the current from the feedback current control circuit to the input of the gain stage may be configured by applying a differential voltage to control terminals of a transistor pair in the feedback current control circuit.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: July 9, 2019
    Assignee: Maxlinear, Inc.
    Inventor: Joseph Palackal Mathew
  • Patent number: 10349112
    Abstract: Methods and systems for multi-path video and network channels may comprise a communication device comprising a wideband tuner (WB) and a narrowband tuner (NB). A video channel and a network channel may be received in the WB when the device is operating in a first stage. A video channel and a network channel may be received in the WB and the network channel may also be received in the NB when the device is operating in a second stage. The network channel may be received in the NB when the device is operating in a third stage. The reception of the network channel from both the WB and NB may enable a continuous reception of the network channel in a transition between the first and third stages. The WB may be operable to receive a plurality of channels and the NB may be operable to receive a single channel.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: July 9, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Anand Anandakumar, Sheng Ye, Curtis Ling
  • Patent number: 10347414
    Abstract: Methods and systems for winding transformers to maximize symmetry of the primary and secondary coils may comprise a transformer with a primary coil and a secondary coil. A first portion of the transformer has at least one turn around a core, and includes twisted pair sections of the primary coil and secondary coil. A second portion of the transformer may include a fractional turn extension of only the primary coil at one end of the first portion, and a third portion of the transformer may include a fractional turn extension of only the secondary coil at an opposite end of the first portion, where the fractional turn extensions area equal in length. A center tap may be coupled to the first portion of the transformer, which may be a balun. The transformer may comprise an off-chip transformer that includes wires wound around a magnetic core.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: July 9, 2019
    Assignee: Maxlinear, Inc.
    Inventor: Paul Chominski
  • Patent number: 10333765
    Abstract: Methods and systems for I/Q mismatch calibration and compensation for wideband communication receivers may comprise receiving a plurality of radio frequency (RF) channels, downconverting the received plurality of received RF channels to baseband frequencies, determining and removing average in-phase (I) and quadrature (Q) gain and phase mismatch of the downconverted channels, determining a phase and amplitude tilt of the downconverted channels with removed average I and Q gain and phase mismatch, and compensating for said phase and amplitude tilt I and Q gain and phase mismatch of the downconverted channels. The determined phase tilt may be compensated utilizing a phase tilt correction filter, which may comprise one or more all-pass filters. The average I and Q gain and phase mismatch may be determined utilizing a blind source separation (BSS) estimation algorithm.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: June 25, 2019
    Assignee: Maxlinear, Inc.
    Inventors: Yongtao Wang, Curtis Ling, Timothy Gallagher