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    • 61. 发明授权
    • Electrostatic discharge protection unit including equalization
    • 静电放电保护单元包括均衡
    • US07218491B2
    • 2007-05-15
    • US10329058
    • 2002-12-23
    • James E. JaussiBryan K. Casper
    • James E. JaussiBryan K. Casper
    • H02H3/22
    • H01L27/0251
    • An electrostatic discharge protection unit includes a channel, a passive filter, and an electrostatic discharge protection circuit. The passive filter and the electrostatic discharge protection circuit are formed on a substrate. The electrostatic discharge protection circuit couples the channel to the passive filter. A method includes, for a channel having a bandwidth determining the bandwidth, and generating a transfer function for a passive filter which when combined in series an electrostatic discharge protection circuit and the channel yields a combination transfer function which has a combination bandwidth that is greater than the channel transfer function bandwidth.
    • 静电放电保护单元包括通道,无源滤波器和静电放电保护电路。 无源滤波器和静电放电保护电路形成在基板上。 静电放电保护电路将通道连接到无源滤波器。 一种方法包括:对于具有确定带宽的带宽的信道,以及产生无源滤波器的传递函数,当无序滤波器串联组合时,静电放电保护电路和信道产生组合传输函数,该组合传递函数的组合带宽大于 通道传输功能带宽。
    • 65. 发明授权
    • Filtering variable offset amplifer
    • 滤波可变偏移放大器
    • US06624688B2
    • 2003-09-23
    • US10041677
    • 2002-01-07
    • James E. JaussiBryan K. CasperAaron K. Martin
    • James E. JaussiBryan K. CasperAaron K. Martin
    • H03F345
    • G06G7/16H03H11/1213
    • A current summing FIR filter can be implemented with multiple differential input stages and variable tail currents. The variable tail currents can be used to appropriately weight the present and previous digital input signals. The weighted outputs of the differential transistor pairs can be summed to provide a filtered output signal. The tail currents can be advantageously varied with variable current sources or by adjustment of the relative widths of the differential transistor pairs. In other embodiments, additional differential pairs can be added to adjust for systematic offset voltages caused by process-induced variations in the structure of circuit devices or to induce a desired offset.
    • 可以用多个差分输入级和可变尾电流来实现电流求和FIR滤波器。 可变尾电流可用于适当地加权当前和以前的数字输入信号。 可以将差分晶体管对的加权输出相加以提供经滤波的输出信号。 可以利用可变电流源或通过调整差分晶体管对的相对宽度来有利地改变尾电流。 在其他实施例中,可以添加额外的差分对以调整由电路装置的结构中的过程引起的变化引起的系统偏移电压或引起期望的偏移。
    • 70. 发明授权
    • Clock and data recovery (CDR) method and apparatus
    • 时钟和数据恢复(CDR)方法和设备
    • US08375242B2
    • 2013-02-12
    • US13196871
    • 2011-08-02
    • Ganesh BalamuruganFrank P. O'MahonyBryan K. Casper
    • Ganesh BalamuruganFrank P. O'MahonyBryan K. Casper
    • G06F1/12G06F1/04H04L27/00
    • H04L7/0337H03L7/0814H03L7/091H04L7/0004
    • Embodiments of methods and apparatus for clock and data recovery are disclosed. In some embodiments, a method for recovering data from an input data stream of a device is disclosed, the method comprising synchronizing, during an initialization phase, a data clock (DCK) with an input data stream; synchronizing, during the initialization phase, an edge clock signal (ECK) with the input data stream based at least in part on a phase relationship between the ECK and the synchronized DCK; and sampling, during the initialization phase, a rising edge of the input data stream with the synchronized ECK to generate a transition level reference voltage. Additional variants and embodiments may also be disclosed and claimed.
    • 公开了用于时钟和数据恢复的方法和装置的实施例。 在一些实施例中,公开了一种用于从设备的输入数据流恢复数据的方法,所述方法包括在初始化阶段期间使具有输入数据流的数据时钟(DCK)同步; 在所述初始化阶段期间,使所述输入数据流的边缘时钟信号(ECK)至少部分地基于所述ECK和所述同步DCK之间的相位关系同步; 并且在初始化阶段期间,利用同步的ECK对输入数据流的上升沿进行采样,以产生转换电平参考电压。 也可以公开和要求保护附加的变型和实施例。