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    CIRCUITS AND METHODS FOR SELF-ADAPTIVE DECISION-FEEDBACK EQUALIZATION IN A MEMORY SYSTEM
    1.
    发明公开
    CIRCUITS AND METHODS FOR SELF-ADAPTIVE DECISION-FEEDBACK EQUALIZATION IN A MEMORY SYSTEM 审中-公开

    公开(公告)号：US20240168873A1

    公开(公告)日：2024-05-23

    申请号：US18162824

    申请日：2021-08-06

    申请人： Rambus Inc.

    发明人： Andrew M. Fuller ,  Barry William Daly ,  Thomas J. Giovannini ,  Lei Luo ,  Masum Hossain

    IPC分类号： G06F12/02 ,  G11C11/408

    CPC分类号： G06F12/0223 ,  G11C11/4082

    摘要： Described are integrated circuits for equalizing parallel write-data and address signals from a memory controller. The integrated circuits each include a set of decision-feedback equalizers, one equalizer for each received signal. Each equalizer in a set has a main sampler and a monitor sampler, each of which samples the respective input signal on edges of a timing-reference signal (e.g. a clock or strobe) that is common to the set. The main sampler samples the input signal relative to a reference. The monitor sampler samples the input signal relative to an adjustable threshold calibrated to monitor one or more levels of the input signal. A feedback network adjusts the respective input signal responsive to one or more tap values that can be adjusted to equalize the signal. An adaptive tap-value generator for one or a collection of the equalizers adjusts the tap value or values as a function of least-mean squares of errors to one or more of the sampler input ports.

    IN-SITU DELAY ELEMENT CALIBRATION
    7.
    发明申请
    IN-SITU DELAY ELEMENT CALIBRATION 有权
    现场延迟元素校准

    公开(公告)号：US20150145581A1

    公开(公告)日：2015-05-28

    申请号：US14539564

    申请日：2014-11-12

    申请人： Rambus Inc.

    发明人： Robert E. Palmer ,  Michael D. Bucher ,  Andrew M. Fuller

    IPC分类号： H03K5/13 ,  H03K5/135

    CPC分类号： H03K5/131 ,  H03K5/135 ,  H03K2005/00058

    摘要： A controllable delay element includes a delay element to provide a variable delay from an input signal to an output signal. The variable delay can be controlled by a digital delay input. The delay element has a delay range that is controlled in response to a delay range input. The delay range of the delay element can be calibrated to a desired range of delays in response to a relative delay between a first timing reference and a second timing reference. A common timing reference is applied to a plurality of receivers and a strobe receiver. The delay through the strobe receiver is adjusted to measure the delay mismatches between the plurality of receivers. The mismatches are used to select a value for the delay through the strobe receiver.

    摘要翻译： 可控延迟元件包括延迟元件以提供从输入信号到输出信号的可变延迟。 可变延迟可以通过数字延迟输入来控制。 延迟元件具有响应于延迟范围输入而被控制的延迟范围。 可以响应于第一定时参考和第二定时参考之间的相对延迟，将延迟元件的延迟范围校准到期望的延迟范围。 公共定时参考应用于多个接收机和选通接收机。 通过选通接收机的延迟被调整以测量多个接收机之间的延迟不匹配。 不匹配用于通过选通接收器选择延迟的值。