公开(公告)号：US20170012623A1

公开(公告)日：2017-01-12

申请号：US15191840

申请日：2016-06-24

Applicant: Rambus Inc.

Inventor： Huy M. Nguyen ,  Vijay Gadde ,  Benedict Lau

IPC: H03K19/00 ,  H03K21/08 ,  H03K5/24

CPC classification number: H03K19/0005 ,  H03K5/24 ,  H03K19/01 ,  H03K21/08 ,  H04L25/0278 ,  H04L25/0298

Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.

Abstract translation: 描述了用于通过一个或多个信号传输线路互连的驱动器管芯和接收器管芯之间的高速通信的管芯端接（ODT）系统和方法。 根据一个实施例的ODT控制系统校准并维持终端电阻和驱动电流以产生最佳输出摆幅电压。 用于校准参考电阻的比较电路也用于校准驱动电流。 一些实施例中的终端元件被分成两个可调节的电阻部分，它们都被设计成最小化容性负载。 一部分被优化以产生相对较高的调节范围，而另一部分被优化用于微调和无故障切换。

公开(公告)号：US20130290766A1

公开(公告)日：2013-10-31

申请号：US13867954

申请日：2013-04-22

Applicant: RAMBUS INC.

Inventor： Huy Nguyen ,  Vijay Gadde ,  Kambiz Kaviani ,  Thomas Giovannini ,  Todd Bystrom

IPC: G06F1/12

CPC classification number: G06F1/12

Abstract: A source-synchronous communication system in which a first integrated circuit (IC) conveys a data signal and concomitant strobe signal to a second IC. One or both ICs support hysteresis for the strobe channel that allows the second IC to distinguish between strobe preambles and noise, and thus prevent the false triggering of data capture. Hysteresis may also be employed to quickly settle the strobe channel to an inactive level after receipt of a strobe postamble.

Abstract translation: 一种源同步通信系统，其中第一集成电路（IC）向第二IC传送数据信号和伴随选通信号。 一个或两个IC支持选通通道的滞后，允许第二IC区分选通前导和噪声，从而防止数据捕获的错误触发。 还可以采用迟滞来在接收到选通后同步码之后快速地将频闪通道置于非活动状态。