公开(公告)号：US20140337645A1

公开(公告)日：2014-11-13

申请号：US14445516

申请日：2014-07-29

Applicant: Rambus Inc.

Inventor： Frederick A. Ware ,  Jared L. Zerbe ,  Brian S. Leibowitz

IPC: G06F3/06 ,  G06F1/32 ,  G11C7/22

CPC classification number: G06F1/3275 ,  G06F1/324 ,  G06F3/0625 ,  G06F3/0659 ,  G06F3/0673 ,  G06F2213/0038 ,  G11C5/14 ,  G11C5/148 ,  G11C7/04 ,  G11C7/22 ,  G11C7/222 ,  G11C11/4072 ,  G11C11/4076 ,  G11C2207/2227 ,  G11C2207/2254

Abstract: A memory device is transitioned to a low-power mode in which an active-mode resource required to receive memory access commands from a memory controller at a first command-signaling frequency of the memory device is disabled. A first memory access command, transmitted by the memory controller, is received within the memory device using an alternative signaling resource during a transitional interval in which the active-mode resource is re-enabled.

Abstract translation: 存储器件被转换到低功率模式，其中禁用在存储器设备的第一命令信号频率处从存储器控制器接收存储器访问命令所需的活动模式资源。 由存储器控制器发送的第一存储器访问命令在其中重新启用活动模式资源的过渡间隔期间使用备用信令资源在存储器设备内被接收。

公开(公告)号：US20140286389A1

公开(公告)日：2014-09-25

申请号：US14158675

申请日：2014-01-17

Applicant: Rambus Inc.

Inventor： Jared L. Zerbe ,  Bruno W. Garlepp ,  Pak S. Chau ,  Kevin S. Donnelly ,  Mark A. Horowitz ,  Stefanos Sidiropoulos ,  Billy W. Garrett, JR. ,  Carl W. Werner

IPC: H04L25/03

CPC classification number: H04L25/4917 ,  G06F13/1678 ,  G06F13/4068 ,  G11C7/10 ,  G11C7/1051 ,  G11C7/1057 ,  G11C7/106 ,  G11C7/1072 ,  G11C7/1078 ,  G11C7/1084 ,  G11C7/1087 ,  G11C7/22 ,  G11C8/10 ,  G11C11/56 ,  G11C27/02 ,  G11C2207/108 ,  H04L7/0331 ,  H04L7/0332 ,  H04L25/0272 ,  H04L25/0282 ,  H04L25/0296 ,  H04L25/0298 ,  H04L25/03006 ,  H04L25/03057 ,  H04L25/08 ,  H04L25/4902

Abstract: An integrated circuit device includes a sense amplifier with an input to receive a present signal representing a present bit. The sense amplifier is to produce a decision regarding a logic level of the present bit. The integrated circuit device also includes a circuit to precharge the input of the sense amplifier by applying to the input of the sense amplifier a portion of a previous signal representing a previous bit. The integrated circuit device further includes a latch, coupled to the sense amplifier, to output the logic level.

Abstract translation: 集成电路器件包括具有输入端的读出放大器，用于接收表示当前位的当前信号。 读出放大器将产生关于当前位的逻辑电平的判定。 该集成电路器件还包括一个电路，用于通过向读出放大器的输入端施加代表先前位的先前信号的一部分来对读出放大器的输入进行预充电。 集成电路器件还包括耦合到读出放大器以输出逻辑电平的锁存器。

公开(公告)号：US20140169438A1

公开(公告)日：2014-06-19

申请号：US14014047

申请日：2013-08-29

Applicant: Rambus Inc.

Inventor： Qi Lin ,  Brian Leibowitz ,  Hae-Chang Lee ,  Jihong Ren ,  Kyung Suk Oh ,  Jared L. Zerbe

IPC: H04L7/033 ,  H04L25/03

CPC classification number: H04L25/03254 ,  H04L7/0025 ,  H04L7/0054 ,  H04L7/0058 ,  H04L7/0087 ,  H04L7/033 ,  H04L7/0331 ,  H04L25/03057 ,  H04L25/03885 ,  H04L43/028 ,  H04L2025/03617

Abstract: A receiver is equipped with an adaptive phase-offset controller and associated timing-calibration circuitry that together shift the timing for a data sampler and a digital equalizer. The sample and equalizer timing is shifted to a position with less residual inter-symbol interference (ISI) energy relative to the current symbol. The shifted position may be calculated using a measure of signal quality, such as a receiver bit-error rate or a comparison of filter-tap values, to optimize the timing of data recovery.

Abstract translation: 接收器配备有自适应相位偏移控制器和相关联的定时校准电路，其一起移动数据采样器和数字均衡器的定时。 样本和均衡器定时被转移到具有相对于当前符号的残余符号间干扰（ISI）能量较少的位置。 可以使用信号质量的测量（诸如接收机比特错误率或滤波器抽头值的比较）来计算移位的位置，以优化数据恢复的定时。

公开(公告)号：US20140153631A1

公开(公告)日：2014-06-05

申请号：US13911363

申请日：2013-06-06

Applicant: Rambus Inc.

Inventor： Jared L. Zerbe ,  Fariborz Assaderaghi ,  Brian S. Leibowitz ,  Hae-Chang Lee ,  Jihong Ren ,  Qi Lin

IPC: H04L25/03

CPC classification number: H04L25/03343 ,  H04L25/03057 ,  H04L25/0307 ,  H04L25/03885 ,  H04L2025/03356 ,  H04L2025/03433 ,  H04L2025/03617

Abstract: A transceiver architecture supports high-speed communication over a signal lane that extends between a high-performance integrated circuit (IC) and one or more relatively low-performance ICs employing less sophisticated transmitters and receivers. The architecture compensates for performance asymmetry between ICs communicating over a bidirectional lane by instantiating relatively complex transmit and receive equalization circuitry on the higher-performance side of the lane. Both the transmit and receive equalization filter coefficients in the higher-performance IC may be adaptively updated based upon the signal response at the receiver of the higher-performance IC.

Abstract translation: 收发器架构支持在高性能集成电路（IC）和使用较不复杂的发送器和接收器的一个或多个相对低性能的IC之间延伸的信号通道上的高速通信。 该架构通过在车道的较高性能侧实例化相对复杂的发送和接收均衡电路来补偿通过双向通道通信的IC之间的性能不对称性。 基于在高性能IC的接收机处的信号响应，可以自适应地更新高性能IC中的发送和接收均衡滤波器系数。

公开(公告)号：US20250053524A1

公开(公告)日：2025-02-13

申请号：US18807548

申请日：2024-08-16

Applicant: Rambus Inc.

Inventor： Jared L. Zerbe ,  Ian P. Shaeffer ,  John Eble

IPC: G06F13/16 ,  G06F1/04 ,  G06F1/06 ,  G06F1/08 ,  G06F1/10 ,  G11C7/04 ,  G11C7/22 ,  H04L7/033

Abstract: A memory controller includes a clock generator to generate a first clock signal and a timing circuit to generate a second clock signal from the first clock signal. The second clock signal times communications with any of a plurality of memory devices in respective ranks, including a first memory device in a first rank and a second memory device in a second rank. The timing circuit is configured to adjust a phase of the first clock signal, when the memory controller is communicating with the second memory device, based on calibration data associated with the second memory device and timing adjustment data associated with feedback from at least the first memory device.

公开(公告)号：US20250036187A1

公开(公告)日：2025-01-30

申请号：US18795900

申请日：2024-08-06

Applicant: Rambus Inc.

Inventor： Jared L. Zerbe ,  Brian Hing-Kit Tsang ,  Barry William Daly

IPC: G06F1/3237 ,  G06F1/324 ,  G06F1/3287 ,  G06F13/16 ,  G06F13/28

Abstract: The disclosed embodiments relate to a system that supports dynamic bursts to facilitate frequency-agile communication between a memory controller and a memory device. During operation, the system monitors a reference clock signal received at an interface between the memory device and the memory controller. Upon detecting a frequency change in the reference clock signal from a fullrate to a subrate, the interface operates in a burst mode, wherein data is communicated through bursts separated by intervening low-power intervals during which portions of the interface are powered down.

公开(公告)号：US12086010B2

公开(公告)日：2024-09-10

申请号：US17891768

申请日：2022-08-19

Applicant: Rambus Inc.

Inventor： Jared L. Zerbe ,  Brian Hing-Kit Tsang ,  Barry William Daly

IPC: G06F1/3237 ,  G06F1/324 ,  G06F1/3287 ,  G06F13/16 ,  G06F13/28

CPC classification number: G06F1/3237 ,  G06F1/324 ,  G06F1/3287 ,  G06F13/1673 ,  G06F13/1689 ,  G06F13/28 ,  Y02D10/00 ,  Y02D30/50

Abstract: The disclosed embodiments relate to a system that supports dynamic bursts to facilitate frequency-agile communication between a memory controller and a memory device. During operation, the system monitors a reference clock signal received at an interface between the memory device and the memory controller. Upon detecting a frequency change in the reference clock signal from a fullrate to a subrate, the interface operates in a burst mode, wherein data is communicated through bursts separated by intervening low-power intervals during which portions of the interface are powered down.

公开(公告)号：US20240063998A1

公开(公告)日：2024-02-22

申请号：US18237375

申请日：2023-08-23

Applicant: Rambus Inc.

Inventor： Jared L. Zerbe

IPC: H04L7/033 ,  H04L7/00

CPC classification number: H04L7/0332 ,  H04L7/0037 ,  H04L7/0008 ,  H04L7/0033

Abstract: An integrated circuit receiver is disclosed comprising a data receiving circuit responsive to a timing signal to detect a data signal and an edge receiving circuit responsive to the timing signal to detect a transition of the data signal. One of the data or edge receiving circuits comprises an integrating receiver circuit while the other of the data or edge sampling circuits comprises a sampling receiver circuit.

公开(公告)号：US11749336B2

公开(公告)日：2023-09-05

申请号：US17521379

申请日：2021-11-08

Applicant: Rambus Inc.

Inventor： Jared L. Zerbe ,  Frederick A. Ware

IPC: G06F1/04 ,  G11C11/4076 ,  G06F13/42 ,  G11C7/10 ,  G11C7/22 ,  G11C7/04 ,  G11C29/02 ,  H04L7/00

CPC classification number: G11C11/4076 ,  G06F1/04 ,  G06F13/4243 ,  G11C7/1093 ,  G11C7/22 ,  G11C7/222 ,  G11C7/04 ,  G11C7/1078 ,  G11C29/022 ,  G11C29/023 ,  G11C29/028 ,  G11C2207/2254 ,  H04L7/0008 ,  Y02D10/00

Abstract: A method of operating a memory controller is disclosed. The method includes transmitting data signals to a memory device over each one of at least two parallel data links. A timing signal is sent to the memory device on a first dedicated link. The timing signal has a fixed phase relationship with the data signals. A data strobe signal is driven to the memory device on a second dedicated link. Phase information is received from the memory device. The phase information being generated internal to the memory device and based on a comparison between the timing signal and a version of the data strobe signal internally distributed within the memory device. A phase of the data strobe signal is adjusted relative to the timing signal based on the received phase information.

公开(公告)号：US20230140420A1

公开(公告)日：2023-05-04

申请号：US17978468

申请日：2022-11-01

Applicant: Rambus Inc.

Inventor： Vladimir M. Stojanovic ,  Andrew C. Ho ,  Anthony Bessios ,  Bruno W. Garlepp ,  Grace Tsang ,  Mark A. Horowitz ,  Jared L. Zerbe ,  Jason C. Wei

IPC: H04L25/03 ,  H04L25/497 ,  H04L7/027 ,  H04L25/06

Abstract: A signaling system is described. The signaling system comprises a transmit device, a receive device including a partial response receive circuit, and a signaling path coupling the transmit device and the receive device. The receive device observes an equalized signal from the signaling path, and includes circuitry to use feedback from the most recent previously resolved symbol to sample a currently incoming symbol. The transmit device equalizes transmit data to transmit the equalized signal, by applying weighting based on one or more data values not associated with the most recent previously resolved symbol value.