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6 条记录 (耗时 0.013 秒)

    Method and apparatus for calibration of a delay element
    1.
    发明授权
    Method and apparatus for calibration of a delay element 失效
    用于校准延迟元件的方法和装置

    公开(公告)号：US06950770B2

    公开(公告)日：2005-09-27

    申请号：US10255871

    申请日：2002-09-25

    申请人： Gregory C. Parrish ,  Subrata Mandal

    发明人： Gregory C. Parrish ,  Subrata Mandal

    IPC分类号： G06F19/00 ,  G11C7/00 ,  H03K5/00 ,  H03K5/13 ,  H03K5/135

    CPC分类号： H03K5/135 ,  H03K5/133 ,  H03K2005/00234

    摘要： Various methods, systems and apparatuses having an integrated circuit that contains a calibration circuit having a series of delay elements to receive a reference signal. The reference signal establishes a standard unit of time. The calibration circuit also generates one or more calibrated delay signals derived from the reference signal. The one or more calibrated delay signals are precise to a known fraction of the standard unit of time.

    摘要翻译： 具有集成电路的各种方法，系统和装置包含具有用于接收参考信号的一系列延迟元件的校准电路。 参考信号建立一个标准的时间单位。 校准电路还产生从参考信号导出的一个或多个经校准的延迟信号。 一个或多个校准的延迟信号精确到标准时间单位的已知分数。

    Valid data strobe detection technique
    4.
    发明授权
    Valid data strobe detection technique 失效

    公开(公告)号：US07002378B2

    公开(公告)日：2006-02-21

    申请号：US09750113

    申请日：2000-12-29

    申请人： Adhiveeraraghavan Srikanth ,  Subrata Mandal

    发明人： Adhiveeraraghavan Srikanth ,  Subrata Mandal

    IPC分类号： H03D1/00

    CPC分类号： G11C7/1078 ,  G06F13/1689 ,  G11C7/1093

    摘要： A valid data strobe detection technique detects a valid data strobe contained within a strobe signal by first determining whether a measured voltage level of the strobe signal is above or below a preselected threshold level. A time period in which the measured voltage level is continuously one of either above or below the preselected threshold level is then measured and a valid data strobe is detected upon the measured time period being greater than a preselected period of time. A comparator may be used to determine whether the measured voltage level of the strobe signal is above or below the preselected threshold level and a sample and hold unit may be used to measure the time period in which the strobe signal is one of either above or below the preselected threshold level.

    System and method for reducing over-shoot and ringback by delaying input and establishing a synchronized pulse over which clamping is applied
    6.
    发明授权
    System and method for reducing over-shoot and ringback by delaying input and establishing a synchronized pulse over which clamping is applied 有权
    通过延迟输入并建立施加钳位的同步脉冲来减少过拍和回铃的系统和方法

    公开(公告)号：US06694444B1

    公开(公告)日：2004-02-17

    申请号：US09608719

    申请日：2000-06-30

    申请人： Subrata Mandal

    发明人： Subrata Mandal

    IPC分类号： G06F130

    CPC分类号： G06F13/4072

    摘要： In one embodiment of the invention, a clamping circuit clamps an input signal to reduce overshoot and ringback. A pulse generator generates a pulse signal having a pulse interval from the input signal and a delayed signal. The input signal transitions from a first level to a second level. The delayed signal is derived from the input signal. A controller generates a control signal responsive to the pulse signal. A switching circuit clamps one of the overshoot and the ringback of the input signal within the pulse interval upon receipt of the control signal.

    摘要翻译： 在本发明的一个实施例中，钳位电路钳位输入信号以减少过冲和回铃。 脉冲发生器产生具有来自输入信号和延迟信号的脉冲间隔的脉冲信号。 输入信号从第一电平转换到第二电平。 延迟信号是从输入信号导出的。 控制器响应脉冲信号产生控制信号。 开关电路在接收到控制信号时，在脉冲间隔内夹紧输入信号的一个过冲和回环。