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    • 42. 发明授权
    • Configurable pre-emphasis driver with selective constant and adjustable output impedance modes
    • 可配置预加重驱动器,具有选择性恒定和可调输出阻抗模式
    • US07888968B2
    • 2011-02-15
    • US12354007
    • 2009-01-15
    • Daniel M. DrepsJohn C. SchiffDhaval R. Sejpal
    • Daniel M. DrepsJohn C. SchiffDhaval R. Sejpal
    • H03K19/094H03K17/16
    • H04B3/145
    • Embodiments of the invention are directed to a single driver that can be used to transmit data with configurable levels of pre-emphasis, and can have either a constant or adjustable driver output impendence, selectively. One embodiment, directed to a driver apparatus, is associated with a digital communication channel for transmitting data signals, wherein at least one of the signals includes a higher frequency component. The apparatus comprises a first sub-driver that has a constant output impedance, and is selectively configurable to implement two or more different levels of pre-emphasis. The apparatus further comprises one or more second sub-drivers. A set of connector elements are provided for connecting the first sub-driver and each of the second sub-drivers in parallel relationship with one another, so that the first sub-driver and each of the second sub-drivers all have inputs that respectively receive a specified driver apparatus input signal, and all have outputs that are connected together to selectively provide a specified driver apparatus output impedance. The apparatus further includes a device that is connected to selectively disable and enable each of the second sub-drivers.
    • 本发明的实施例涉及可用于传输具有可配置水平的预加重的数据的单个驱动器,并且可以选择性地具有恒定的或可调节的驱动器输出阻抗。 针对驱动器装置的一个实施例与用于传输数据信号的数字通信信道相关联,其中信号中的至少一个包括较高频率分量。 该装置包括具有恒定输出阻抗的第一子驱动器,并且可选择性地配置为实现两个或多个不同级别的预加重。 该装置还包括一个或多个第二子驱动器。 提供了一组连接器元件,用于将第一子驱动器和每个第二子驱动器彼此并联连接,使得第一子驱动器和每个第二子驱动器都具有分别接收的输入 指定的驱动器装置输入信号,并且都具有连接在一起的输出,以选择性地提供指定的驱动器装置输出阻抗。 该装置还包括被连接以选择性地禁用并启用每个第二子驱动器的装置。
    • 44. 发明授权
    • Signal history controlled slew-rate transmission method and bus interface transmitter
    • 信号历史控制压摆率传输方式和总线接口发射机
    • US07696787B2
    • 2010-04-13
    • US11962093
    • 2007-12-21
    • Daniel N. De AraujoDaniel M. DrepsBhyrav M. Mutnury
    • Daniel N. De AraujoDaniel M. DrepsBhyrav M. Mutnury
    • H03K19/0175H03B5/22
    • H04L25/0286H04L25/0272
    • A signal history controlled slew-rate transmission method and bus interface transmitter provide an improved channel equalization mechanism having low complexity. A variable slew-rate feed-forward pre-emphasis circuit changes the slew rate of the applied pre-emphasis in conformity with the history of the transmitted signal. The pre-emphasis circuit may be implemented by a pair of current sources supplying the output of the transmitter, and having differing current values. The current sources are controlled such that upon a signal value change, a high slew rate is provided and when the signal value does not change for two consecutive signal periods, the slew rate is reduced. A current source having a controlled magnitude may be employed to provide a slew rate that changes over time and is continuously reduced until another transmission value change occurs.
    • 信号历史控制的转换速率传输方法和总线接口发射机提供了一种具有低复杂度的改进的信道均衡机制。 可变转换速率前馈预加重电路根据发送信号的历史改变所施加的预加重的转换速率。 预加重电路可以由提供发射机的输出并具有不同电流值的一对电流源来实现。 控制电流源,使得在信号值变化时,提供高压摆率,并且当两个连续信号周期的信号值不变时,转换速率降低。 可以使用具有受控幅度的电流源来提供随时间变化的压摆率,并且持续地减小,直到发生另一个传输值变化。
    • 45. 发明申请
    • VARIABLE INPUT VOLTAGE REGULATOR
    • 可变输入电压调节器
    • US20100019744A1
    • 2010-01-28
    • US12178678
    • 2008-07-24
    • Seongwon KimDaniel M. Dreps
    • Seongwon KimDaniel M. Dreps
    • G05F1/10
    • G05F1/561
    • A variable input voltage regulator includes a first circuit configured to convert a first voltage from a first voltage source to a first current, and a second circuit electrically coupled to the first circuit and configured to mirror the first current to a voltage output node. The variable input voltage regulator further includes a third circuit electrically coupled to the voltage output node of the second circuit and configured to supply additional current to the voltage output node from a second voltage of a second voltage source in response to a control input.
    • 可变输入电压调节器包括被配置为将第一电压从第一电压源转换为第一电流的第一电路,以及电耦合到第一电路并被配置为将第一电流镜像到电压输出节点的第二电路。 可变输入电压调节器还包括电耦合到第二电路的电压输出节点并被配置为响应于控制输入从第二电压源的第二电压向电压输出节点提供附加电流的第三电路。
    • 50. 发明授权
    • Dynamic recalibration mechanism for elastic interface
    • 弹性界面的动态重新校准机制
    • US07440531B2
    • 2008-10-21
    • US11055865
    • 2005-02-11
    • Daniel M. DrepsFrank D. FerraioloGary A. PetersonRobert J. Reese
    • Daniel M. DrepsFrank D. FerraioloGary A. PetersonRobert J. Reese
    • H04L25/00
    • H04L7/005G11C19/287H03K5/133H03K2005/00058H04L7/0338
    • A method and apparatus for de-skewing and aligning digital data received over an elastic interface bus is disclosed. Upon receiving the data, it is sent through a programmable delay line. While in the programmable delay line, the data is sampled at three points within the data's eye pattern. The three sampling points are dynamically adjusted to maximize coverage of the data's eye pattern. During the adjustment of the sampling points to optimally cover the data's eye pattern, delayed data is sampled from an alternate sampler to prevent sampling from the functional sampler while the delay in the primary sampler is adjusted. Sampling from the alternate sampler while changing the sampling points of the functional sampler serves to reduce glitches that may occur by sampling the functional sampler while its sampling parameters are changed. The method and apparatus allow for alternate eye tracking and wrap around eye tracking.
    • 公开了一种用于使在弹性接口总线上接收的数字数据去偏斜和对准的方法和装置。 在接收到数据后,通过可编程延迟线发送。 在可编程延迟线中,数据在数据眼图中的三个点进行采样。 动态调整三个采样点,以最大化数据眼图的覆盖范围。 在调整采样点以最佳地覆盖数据的眼图时,延迟数据从备用采样器采样,以防止在采样器中的延迟调整时从功能采样器采样。 在更换功能采样器的采样点时,从备用采样器进行采样可以减少在采样参数变化时采样功能采样器可能发生的毛刺。 所述方法和装置允许替代眼睛跟踪并包裹眼睛跟踪。