Patents Assigned to Marvell International Ltd.
  • Patent number: 10705797
    Abstract: Disclosed is a parallel prefix adder structure with a carry bit generation circuit that generates primary carry bits for only some bit pairs and a sum circuit with ripple carry adders that use these primary carry bits to generate secondary carry bits and sum bits for a final sum. The carry bit generation circuit has different sections, which process different sequential sets of bit pairs and which have different sparsity configurations. As a result, generation of the primary carry bits is non-uniform. That is, in the different sections the primary carry bits are generated at different carry bit-to-bit pair ratios (e.g., the carry bit-to-bit pair ratios for the different sections can be 1:2, 1:4, and 1:2, respectively). For optimal performance, the specific bit pairs for which these primary carry bits are generated varies depending upon whether the maximum operand size is an odd number of bits or an even number.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: July 7, 2020
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventors: Ranjan B. Lokappa, Igor Arsovski
  • Patent number: 10707845
    Abstract: The present disclosure relates to a structure which includes a voltage level shifter circuit which includes a first current mirror leg circuit and a second current mirror leg circuit, the first current mirror leg circuit receives an input signal on a low voltage power supply and level shifts the input signal to a high voltage power supply which is at a greater voltage than the low voltage power supply, and the high voltage power supply is output from the second current mirror leg circuit.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: July 7, 2020
    Assignee: Marvell International Ltd.
    Inventors: Eric D. Hunt-Schroeder, John A. Fifield
  • Patent number: 10707411
    Abstract: A semiconductor device comprises a first conductive material, a contact, an a magnetic tunneling junction positioned between the first conductive material and the contact. The semiconductor device further comprises a spacer that is positioned between the first conductive material and the contact and surrounds at least a portion of the magnetic tunneling junction. The spacer comprises spacer material that has at least some etch selectivity compared to a dielectric material that surrounds at least a portion of the first conductive material.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: July 7, 2020
    Assignee: Marvell International Ltd.
    Inventors: Zining Wu, Winston Lee, Runzi Chang
  • Patent number: 10701002
    Abstract: A method for deallocating memory in a first network device is described. A multicast packet is received and stored in memory cells. Egress descriptors corresponding to the multicast packet are generated for transmission of the multicast packet. A final count of the egress descriptors is determined. The egress descriptors are processed for transmission of the multicast packet and a value of a signed reference counter corresponding to the multicast packet is updated in a first direction before the final count has been determined and after a copy of the multicast packet has been received by an egress port of the first network device. The value of the signed reference counter is updated in a second direction opposite the first direction by the final count after determination of the final count. The memory cells are deallocated when cumulative first direction updates are equal to the second direction update.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: June 30, 2020
    Assignee: Marvell International Ltd.
    Inventor: Jacob Jul Schroder
  • Patent number: 10701632
    Abstract: A first communication device generates and transmits a wakeup packet configured to cause a wakeup radio of a second communication device to prompt a wireless local area network (WLAN) network interface device of the second communication device to transition from a low power state to an active state. The wakeup packet is generated to include i) a WLAN legacy preamble, ii) a wakeup radio (WUR) preamble, and iii) a data portion. The data portion comprises a plurality of time segments, each time segment corresponds to a respective information bit. The data portion is generated to include a respective prefix inserted prior to each time segment corresponding to the respective bit to mitigate intersymbol interference at a receiver caused at least by multipath effects.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: June 30, 2020
    Assignee: Marvell International Ltd.
    Inventors: Hua Mu, Rui Cao, Xiayu Zheng, Hongyuan Zhang
  • Patent number: 10699763
    Abstract: The present disclosure relates to a structure which includes a merged write driver circuit with a first device next to a first memory array and a second device next to a second memory array, and the merged write driver circuit being configured to share a write driver line between the first device and the second device.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: June 30, 2020
    Assignee: Marvell International Ltd.
    Inventors: Wuyang Hao, Jack T. Wong, Chunsung Chiang
  • Patent number: 10694491
    Abstract: This disclosure describes systems and methods for detecting motion based on channel correlation in wireless communication signals. A receiver at a first wireless communication device is capable of wirelessly communicating with a second wireless communication device. The first wireless communication device is configured to receive from the second wireless communication device via two or more subcarriers a first packet and a channel correlation for the first packet across the two or more subcarriers. Control circuitry is configured to estimate a channel energy difference for the receiver based on the channel correlation for the first packet. A motion detection decision is then made based on the estimated channel energy difference.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: June 23, 2020
    Assignee: Marvell International Ltd.
    Inventors: Xiayu Zheng, Xilin Cheng, Zhipei Chi
  • Patent number: 10694523
    Abstract: A first communication device in a first wireless network determines a transmit power for transmitting a first packet during a spatial reuse opportunity corresponding to a transmission in a second wireless network. Determining the transmit power includes using a spatial reuse parameter, indicative of an acceptable interference level in the second wireless network, included in a second packet transmitted by a second communication device in the second wireless network. The first communication device generates the first packet to include information to indicate to a third communication device, that is an intended receiver of the first packet, to not transmit an acknowledgment of the first packet according to a normal acknowledgment procedure during the spatial reuse opportunity.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: June 23, 2020
    Assignee: Marvell International Ltd.
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10686427
    Abstract: During operation of an analog filter having one or more filter stages is configured to operate in a first configuration. Configuring the analog filter to operate in the first filter configuration includes configuring one or both of i) a filter response of the analog filter and ii) a filter bandwidth of the analog filter. A first set of one or more direct current (DC) offset correction codes corresponding to the first filter configuration are retrieved from a memory. The one or more DC offset correction codes in the first set are converted to one or more first analog DC offset correction signals. While operating the analog filter configured in the first configuration, the one or more first analog DC offset correction signals are applied to the one or more filter stages of the analog filter.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: June 16, 2020
    Assignee: Marvell International Ltd.
    Inventors: Manisha Gambhir, Ahmed Hesham Mostafa, Jingren Gu
  • Patent number: 10681625
    Abstract: In aspects of acknowledgement options for downlink multi-user transmission, a wireless network system includes an access point that can communicate a downlink multi-user transmission soliciting acknowledgement from one or more station devices. The access point can receive an association request or an operation mode change request frame from one or more of the station devices, and determine an acknowledgement option for each of the station devices that communicate the request to the access point. The access point can then use a multi-user transmission mode or a single user transmission mode for each of the station devices based on the acknowledgement option determined for each of the respective station devices.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: June 9, 2020
    Assignee: Marvell International Ltd.
    Inventors: Jinjing Jiang, Liwen Chu, Lei Wang, Yakun Sun, Hongyuan Zhang
  • Patent number: 10672861
    Abstract: Techniques create a semiconductor layout comprising a resistor structure having a defined baseline sheet resistance. The semiconductor layout includes a resistor marker layer over the resistor structure. A sheet resistance matching estimate is performed to ascertain a difference between the baseline sheet resistance and a resultant sheet resistance if the resistor structure were to be manufactured using a manufacturing process. A mask generating algorithm is generated based on the difference effective to achieve a sheet resistance of the resistor structure that is closer to the baseline sheet resistance rather than the resultant sheet resistance. The mask generating algorithm enables one or more masks to be generated to modify the resistor structure relative to the resistor marker layer.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: June 2, 2020
    Assignee: Marvell International LTD.
    Inventor: Runzi Chang
  • Patent number: 10673994
    Abstract: A media content converter, for converting media content into network packets, includes logic circuitry, a header generator and a multiplexer. The logic circuitry is configured to partition the media content into payloads for the network packets. The header generator configured to generate packet headers for the network packets, by populating with data a plurality of header fields according to a predefined header format. The multiplexer is configured to stream a sequence of the network packets for transmission over a communication network, by combining the generated packet headers from the header generator with the corresponding payloads from the logic circuitry.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: June 2, 2020
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventors: Lukas Reinbold, Thomas Kniplitsch
  • Patent number: 10665378
    Abstract: Embodiments described herein provide circuitry employing an inductor having enhanced circuit area usage. The circuitry includes an inductor having a first loop and a second loop adjoining the first loop to form a figure-eight configuration. The circuitry further includes a circuit component disposed at least partially inside an area defined by at least one of the first loop and the second loop. The inductor has an intersection portion between the first loop and the second loop. An input node is located proximate to the intersection portion, the input node having a first extension disposed inside the first loop. An output node is located proximate to the intersection portion. The output node has a second extension disposed inside the second loop. At least a first capacitor is coupled to the input node and the second extension, and at least a second capacitor coupled to the output node and the first extension.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: May 26, 2020
    Assignee: Marvell International Ltd.
    Inventors: Cao-Thong Tu, Konstantinos Manetakis, Xiang Gao
  • Patent number: 10660128
    Abstract: Systems and methods for carrier sensing and symbol timing in a multiple-antenna communication system are provided. A wireless receiver receives two or more signals from two or more antennas, respectively. A set of column vectors comprising time samples obtained from each of the received signals at the two or more antennas are generated. A multiple-antenna eigen-combining (MAEC) vector is computed based on the set of column vectors. The respective received signals are multiplied with a corresponding combining coefficient of the MAEC vector to obtain a respective weighted signal. A combined signal is generated by adding the respective weighted signals and carrier sensing and symbol timing is performed on the two or more received signals based on the combined signal.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: May 19, 2020
    Assignee: Marvell International Ltd.
    Inventors: Rui Cao, Xiayu Zheng
  • Patent number: 10659442
    Abstract: Provided is a method in a device under configuration (DUC) for communicating with a remote device over a wireless local area network. The method comprises transmitting a beacon to a remote device, providing a first security key to the remote device using first security measures, authenticating the remote device using second security measures, receiving encrypted secrets from the remote device, and obtaining network access using the secrets. Also, provided is a method of providing network access information over a wireless network. The method comprises identifying a device under configuration (DUC) from information contained in a beacon transmitted by the DUC, retrieving a public KEY from the DUC, authenticating the DUC using first security measures, encrypting secrets, and transmitting encrypted commands to the DUC.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: May 19, 2020
    Assignee: Marvell International Ltd.
    Inventors: Frank Huang, Timothy J. Donovan
  • Patent number: 10658003
    Abstract: A receiver device receives a signal via a communication channel, the signal (i) having been transmitted by a transmitter device, and (ii) corresponding to a pseudorandom bit sequence (PRBS). The receiver device correlates the received signal with a known signal to generate a correlation signal. The known signal includes the PRBS. The receiver device identifies one or more characteristics of the correlation signal, and determines one or more parameters of the communication channel using the identified one or more characteristics of the correlation signal. The receiver device i) uses the one or more parameters corresponding to the communication channel to process subsequent signals received via the communication channel, and/or ii) communicates the one or more parameters to the transmitter device to prompt the transmitter device to preprocess subsequent signals to be transmitted via the communication channel by the transmitter device.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: May 19, 2020
    Assignee: Marvell International Ltd.
    Inventors: Ke Du, Hongxin Song, Jun Gao
  • Patent number: 10659017
    Abstract: Disclosed are scan flip-flops (SFFs) that reduce the dynamic power consumption of a system-on-chip (SOC) that incorporates them. Each SFF includes a master latch and a slave latch, each having a driver, a feed-forward path and a feedback path. Each SFF further includes at least one shared clock-gated power supply transistor, which is controlled by either a clock signal or an inverted clock signal to selectively and simultaneously connect a voltage rail to both the driver from one latch and the feedback path of the other latch. The different SFF embodiments have different numbers of shared clock-gated power supply transistors and various other different features designed for optimal power and/or performance. For example, the different SFF embodiments have different types of slave latch drivers; different types of transistors; and/or different types of master latch drivers (e.g., a single-stage, multiple clock phase-dependent driver or a multi-stage, single clock phase-dependent driver).
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: May 19, 2020
    Assignee: Marvell International Ltd.
    Inventors: Krishnan S. Rengarajan, Alok Chandra, Chethan Ramanna
  • Patent number: 10644834
    Abstract: A method for communication, including, in a Physical Layer (PHY) transceiver, selecting a transmission bitrate from a plurality of transmission bitrates, for transmitting over a media interface bits received from an external device. The received bits are processed by generating, using a framing and encoding scheme that depends on at least the selected transmission bitrate, frames having a common frame length among the framing and encoding schemes. The frames are encoded to produce code words of a predefined Forward Error Correction Code (FEC) code, using a single FEC encoder that accepts a number of bits for encoding equal to the frame length. Sub-units of the code words are mapped into symbols using one of at least two mapping schemes that employ different voltage amplitude levels to define a transmission symbol, the mapping scheme being selected according to the selected transmission bitrate. The symbols are transmitted over the media interface.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: May 5, 2020
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventors: Brett Anthony McClellan, Ming-Tak Leung, Xing Wu
  • Patent number: 10631187
    Abstract: Aspects of the disclosure provide an apparatus that includes a transceiver circuit and a processing circuit. The transceiver circuit is configured to transmit and receive wireless signals. The processing circuit is configured to generate a request frame using an extended control frame format to indicate an enhanced fine timing measurement (EFTM) based range measurement to a second apparatus, cause the transceiver circuit to transmit, when a transmission opportunity (TXOP) is granted to the apparatus, wireless signals carrying the request frame to start the EFTM based range measurement that exchanges null data packets with the second apparatus, and determine a round trip time based on departure and arrival timing information of the null data packets.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: April 21, 2020
    Assignee: Marvell International Ltd.
    Inventors: Liwen Chu, Sagar A. Tamhane, Christian R. Berger, Niranjan Grandhe, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10630340
    Abstract: Embodiments described herein provide echo cancellation power saving management at a cable transceiver. An echo response signal having a first number of signal components is obtained, via an echo cancellation filter. At a first iteration for calculating a first accumulative echo power, a respective echo tap that corresponds to the first iteration is identified. The first accumulative echo power is calculated for the respective iteration by summing powers of outputs from a last echo tap to the respective echo tap. It is then determined whether the first accumulative echo power, exceeds a pre-determined echo power threshold. If the first accumulative echo power exceeds the pre-determined echo power threshold, a first turn-off indication is sent to the echo cancellation filter to turn off all echo taps including and between the last echo tap to the first echo tap.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: April 21, 2020
    Assignee: Marvell International Ltd.
    Inventors: Shaoan Dai, Kok-Wui Cheong, Zhenzhong Gu