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    Efficient Storage of Blockchain in Embedded Device
    2.
    发明申请
    Efficient Storage of Blockchain in Embedded Device 有权

    公开(公告)号：US20220417008A1

    公开(公告)日：2022-12-29

    申请号：US17359545

    申请日：2021-06-26

    Applicant: Redpine Signals, Inc.

    Inventor： Ananya SHRIVASTAVA ,  Mohammed SUMAIR ,  Joydeep Kumar DEVNATH ,  Suyash Kandele ,  Goyardhan Mattela

    IPC: H04L9/08 ,  H04L9/32

    Abstract: A lightweight node in a decentralized network includes stores a blockchain with a plurality of blocks. The lightweight node adds blocks to the blockchain successively. A given block having a header and a body. The header includes a data merkle root generated as a root hash of a data merkle tree with one or more leaf nodes that are one or more hashes. A given hash being a hash of a combination of (1) a public key associated with a lightweight node of the decentralized network and (2) of a validity value associated with the public key indicating whether the public key is a valid public key. The data merkle root being insufficient for restoring the data merkle tree. But with a public key and an intermediate hash the date merkle root is sufficient for at least partly verifying the public key.

    Unit Element for Asynchronous Analog Multiplier Accumulator
    3.
    发明申请
    Unit Element for Asynchronous Analog Multiplier Accumulator 有权

    公开(公告)号：US20220207247A1

    公开(公告)日：2022-06-30

    申请号：US17139226

    申请日：2020-12-31

    Applicant: Redpine Signals, Inc.

    Inventor： Ryan BOESCH ,  Martin KRAEMER ,  Wei XIONG

    IPC: G06G7/16 ,  G06F17/16 ,  G06J1/00

    Abstract: A multiplier-accumulator accepts A and B digital inputs and generates a dot product P by applying the bits of the A input and the bits of the B inputs to unit elements comprised of groups of AND gates coupled to charge transfer lines through a capacitor Cu. The number of bits in the B input is a number of AND-groups and the number of bits in A is the number of AND gates in an AND-group. Each unit element receives one bit of the B input applied to all of the AND gates of the unit element, and each unit element having the bits of A applied to each associated AND gate input of each unit element. The AND gates are coupled to charge transfer lines through a capacitor Cu, and the charge transfer lines couple to binary weighted charge summing capacitors which sum and scale the charges from the charge transfer lines, the charge coupled to an analog to digital converter which forms the dot product output. The charge transfer lines may span multiple unit elements.

    Decompression engine for executable microcontroller code
    6.
    发明授权
    Decompression engine for executable microcontroller code 有权

    公开(公告)号：US10541708B1

    公开(公告)日：2020-01-21

    申请号：US16140526

    申请日：2018-09-24

    Applicant: Redpine Signals, Inc.

    Inventor： Subba Reddy Kallam ,  Sriram Mudulodu

    IPC: H03M7/00 ,  H03M7/30 ,  G06F9/30 ,  G06F9/22 ,  G06F16/901

    Abstract: A code decompression engine reads compressed code from a memory containing a compressed code part and a dictionary part. The compressed code part contains a series of instructions being either an uncompressed instruction preceded by an uncompressed code bit, or a compressed instruction having a compressed code bit followed by a number of segments field followed by segments, followed by a directory index indication a directory location to read. Each segment consists of a mask type, a mask offset, and a mask.

    Encoder and decoder for transmission of coefficients to a neural network
    7.
    发明授权
    Encoder and decoder for transmission of coefficients to a neural network 有权

    公开(公告)号：US10528641B2

    公开(公告)日：2020-01-07

    申请号：US15979257

    申请日：2018-05-14

    Applicant: Redpine Signals, Inc.

    Inventor： Jay A. Chesavage

    IPC: G06F7/00 ,  G06F17/15 ,  G06F7/483 ,  G06N3/04

    Abstract: A method for efficient transmission of coefficients examines a coefficient list, presents the coefficients as binary floating point representation, and transmits the list of coefficients as a header having an exponent prefix, a fractional suffix, and each coefficient value as an exponent suffix and fractional prefix. A method for reception of coefficients receives a header including an exponent prefix, a fractional suffix, thereafter receiving each value as a sign bit, an exponent suffix and a fractional prefix, reconstituting an approximation of the original value, in sequence, as a sign bit, exponent prefix exponent suffix, fraction prefix, and fraction suffix, thereby greatly reducing the amount of information to be transmitted or received.

    Power-save system for detection of Bluetooth Long Range Packets
    8.
    发明申请
    Power-save system for detection of Bluetooth Long Range Packets 审中-公开

    公开(公告)号：US20190364504A1

    公开(公告)日：2019-11-28

    申请号：US16538797

    申请日：2019-08-12

    Applicant: Redpine Signals, Inc.

    Inventor： Partha Sarathy MURALI ,  SuryaNarayana Varma Nallaparaju

    IPC: H04W52/02 ,  H04W4/80

    Abstract: A preamble detector for a Bluetooth Long Range includes a receiver for forming baseband samples from Bluetooth packets and a preamble detect controller for enabling and disabling power to the receiver. Where the preamble duration is Tcyc, the preamble detector turns on for a preamble detect time T1 and turns off for a duration T2, where T2=Tcyc−2*T1. A series of hierarchical decisions is made on sequentially increasing intervals of time based on an accumulated correlation result of correlating the baseband samples against a SYNC sequence to power the receiver back down before the end of the T1 period when the accumulated correlation result is below a threshold and continues to a subsequent correlation interval when the accumulated correlation result is above a threshold, where the threshold is established to have at least a 20% false alarm rate for preamble detection.

    Power-save system for detection of Bluetooth long range packets
    9.
    发明授权
    Power-save system for detection of Bluetooth long range packets 有权

    公开(公告)号：US10425895B2

    公开(公告)日：2019-09-24

    申请号：US16221561

    申请日：2018-12-16

    Applicant: Redpine Signals, Inc.

    Inventor： Partha Sarathy Murali ,  SuryaNarayana Varma Nallajaraju

    IPC: H04W52/02 ,  H04W4/80

    Abstract: A preamble detector for a Bluetooth Long Range includes a receiver for forming baseband samples from Bluetooth packets and a preamble detect controller for enabling and disabling power to the receiver. Where the preamble duration is Tcyc, the preamble detector turns on for a preamble detect time T1 and turns off for a duration T2, where T2=Tcyc−2*T1. A series of hierarchical decisions is made on sequentially increasing intervals of time based on an accumulated correlation result of correlating the baseband samples against a SYNC sequence to power the receiver back down before the end of the T1 period when the accumulated correlation result is below a threshold and continues to a subsequent correlation interval when the accumulated correlation result is above a threshold, where the threshold is established to have at least a 20% false alarm rate for preamble detection.

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