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    MEMORY COMPONENTS AND CONTROLLERS THAT CALIBRATE MULTIPHASE SYNCHRONOUS TIMING REFERENCES
    1.
    发明申请
    MEMORY COMPONENTS AND CONTROLLERS THAT CALIBRATE MULTIPHASE SYNCHRONOUS TIMING REFERENCES 审中-公开

    公开(公告)号：US20200258557A1

    公开(公告)日：2020-08-13

    申请号：US16793638

    申请日：2020-02-18

    Applicant: Rambus Inc.

    Inventor： Thomas GIOVANNINI ,  Scott C. BEST ,  Lei LUO ,  Ian SHAEFFER

    IPC: G11C7/22 ,  G11C29/02 ,  G11C29/50 ,  G11C29/56

    Abstract: A first timing reference signal and a second timing reference signal are sent to a memory device. The second timing reference signal has approximately a quadrature phase relationship with respect to the first timing reference signal. A plurality of serial data patterns are received from the memory device. The transitions of the first timing reference and the second timing reference determining when transitions occur between the bits of the plurality of data patterns. Timing indicators associated with when received transitions occur between the bits of the plurality of data patterns are received from the memory device. The timing indicators are each measured using a single sampler. Based on the timing indicators, a first duty cycle adjustment for the first timing reference signal, a second duty cycle adjustment for the second timing reference signal, and a quadrature phase adjustment are determined and applied.

    MODULE AUTHENTICATION
    2.
    发明公开
    MODULE AUTHENTICATION 审中-公开

    公开(公告)号：US20240146546A1

    公开(公告)日：2024-05-02

    申请号：US18278374

    申请日：2022-02-25

    Applicant: Rambus Inc.

    Inventor： Scott C. BEST ,  Thomas VOGELSANG ,  Michael Alexander HAMBURG ,  Mark Evan MARSON ,  Helena HANDSCHUH ,  HAMPEL E. Craig ,  Kenneth Lee WRIGHT

    IPC: H04L9/32 ,  G06F21/73

    CPC classification number: H04L9/3268 ,  G06F21/73

    Abstract: An asymmetric key cryptographic system is used to generate a cryptographic certificate for authenticating a memory module. This certificate is generated based on information, readable by the authenticator (e.g., host system), from at least one device on the memory module that is not read in order to obtain the certificate. For example, the certificate for authenticating a module may be stored in the nonvolatile memory of a serial presence detect device. The certificate itself, however, is based at least in part on information read from at least one other device on the memory module. Examples of this other device include a registering clock driver, DRAM device(s), and/or data buffer device(s). In an embodiment, the information read from a device (e.g., DRAM) may be based on one or more device fingerprint(s) derived from physical variations that occur naturally, and inevitably, during integrated circuit manufacturing.

    FORWARDING SIGNAL SUPPLY VOLTAGE IN DATA TRANSMISSION SYSTEM
    4.
    发明申请
    FORWARDING SIGNAL SUPPLY VOLTAGE IN DATA TRANSMISSION SYSTEM 有权

    公开(公告)号：US20210090614A1

    公开(公告)日：2021-03-25

    申请号：US17068505

    申请日：2020-10-12

    Applicant: Rambus Inc.

    Inventor： Scott C. BEST ,  John W. POULTON

    IPC: G11C5/14 ,  H04L25/02 ,  G06F13/40 ,  H04L1/20 ,  H04L25/08 ,  G06F11/07

    Abstract: In a data transmission system, one or more signal supply voltages for generating the signaling voltage of a signal to be transmitted are generated in a first circuit and forwarded from the first circuit to a second circuit. The second circuit may use the forwarded signal supply voltages to generate another signal to be transmitted back from the second circuit to the first circuit, thereby obviating the need to generate signal supply voltages separately in the second circuit. The first circuit may also adjust the signal supply voltages based on the signal transmitted back from the second circuit to the first circuit. The data transmission system may employ a single-ended signaling system in which the signaling voltage is referenced to a reference voltage that is a power supply voltage such as ground, shared by the first circuit and the second circuit.

    FORWARDING SIGNAL SUPPLY VOLTAGE IN DATA TRANSMISSION SYSTEM
    8.
    发明申请
    FORWARDING SIGNAL SUPPLY VOLTAGE IN DATA TRANSMISSION SYSTEM 有权

    公开(公告)号：US20220343953A1

    公开(公告)日：2022-10-27

    申请号：US17668606

    申请日：2022-02-10

    Applicant: Rambus Inc.

    Inventor： Scott C. BEST ,  John W. POULTON

    IPC: G11C5/14 ,  H04L25/02 ,  G06F13/40 ,  H04L1/20 ,  H04L25/08 ,  G06F11/07

    Abstract: In a data transmission system, one or more signal supply voltages for generating the signaling voltage of a signal to be transmitted are generated in a first circuit and forwarded from the first circuit to a second circuit. The second circuit may use the forwarded signal supply voltages to generate another signal to be transmitted back from the second circuit to the first circuit, thereby obviating the need to generate signal supply voltages separately in the second circuit. The first circuit may also adjust the signal supply voltages based on the signal transmitted back from the second circuit to the first circuit. The data transmission system may employ a single-ended signaling system in which the signaling voltage is referenced to a reference voltage that is a power supply voltage such as ground, shared by the first circuit and the second circuit.

    MEMORY MODULE REGISTER ACCESS
    9.
    发明申请
    MEMORY MODULE REGISTER ACCESS 有权

    公开(公告)号：US20210303383A1

    公开(公告)日：2021-09-30

    申请号：US17236445

    申请日：2021-04-21

    Applicant: Rambus Inc.

    Inventor： Thomas J. GIOVANNINI ,  Catherine CHEN ,  Scott C. BEST ,  John Eric LINSTADT ,  Frederick A. WARE

    IPC: G06F11/07 ,  G11C29/44 ,  G06F13/00 ,  G11C5/04 ,  G11C7/20 ,  G11C8/12 ,  G11C29/26

    Abstract: During system initialization, each data buffer device and/or memory device on a memory module is configured with a unique (at least to the module) device identification number. In order to access a single device (rather than multiple buffers and/or memory devices), a target identification number is written to all of the devices using a command bus connected to all of the data buffer devices or memory devices, respectively. The devices whose respective device identification numbers do not match the target identification number are configured to ignore future command bus transactions (at least until the debug mode is turned off.) The selected device that is configured with a device identification number matching the target identification number is configured to respond to command bus transactions.

    FORWARDING SIGNAL SUPPLY VOLTAGE IN DATA TRANSMISSION SYSTEM
    10.
    发明申请
    FORWARDING SIGNAL SUPPLY VOLTAGE IN DATA TRANSMISSION SYSTEM 审中-公开

    公开(公告)号：US20200185009A1

    公开(公告)日：2020-06-11

    申请号：US16696780

    申请日：2019-11-26

    Applicant: Rambus Inc.

    Inventor： Scott C. BEST ,  John W. POULTON

    IPC: G11C5/14 ,  G06F11/07 ,  H04L25/08 ,  H04L1/20 ,  G06F13/40 ,  H04L25/02

    Abstract: In a data transmission system, one or more signal supply voltages for generating the signaling voltage of a signal to be transmitted are generated in a first circuit and forwarded from the first circuit to a second circuit. The second circuit may use the forwarded signal supply voltages to generate another signal to be transmitted back from the second circuit to the first circuit, thereby obviating the need to generate signal supply voltages separately in the second circuit. The first circuit may also adjust the signal supply voltages based on the signal transmitted back from the second circuit to the first circuit. The data transmission system may employ a single-ended signaling system in which the signaling voltage is referenced to a reference voltage that is a power supply voltage such as ground, shared by the first circuit and the second circuit.

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