HIGHLY FLEXIBLE FRACTIONAL N FREQUENCY SYNTHESIZER
    1.
    发明申请
    HIGHLY FLEXIBLE FRACTIONAL N FREQUENCY SYNTHESIZER 有权
    高灵敏度的零频合成器

    公开(公告)号:US20110310942A1

    公开(公告)日:2011-12-22

    申请号:US12819683

    申请日:2010-06-21

    IPC分类号: H03L7/00 H04L7/00 H04B1/38

    CPC分类号: H03L7/183 H03L7/081

    摘要: One embodiment of the present invention provides a phase-locked loop (PLL) for synthesizing a fractional frequency. The PLL can include a 1/N frequency divider, a voltage-controlled oscillator (VCO), a programmable phase mixer, and a phase detector. The programmable phase mixer can be coupled between an output of the VCO and an input of the frequency divider, wherein the programmable phase mixer is configured to receive the output clock signal from the VCO and generate a first clock signal of frequency f1 by varying a phase of the output clock signal. The frequency divider is configured to receive the first clock signal from the programmable phase mixer and generate a second clock signal of frequency f2=f1/N. The phase detector can receive a reference clock signal and the second clock signal as inputs, and the phase detector's output can be used to generate the control voltage for the VCO.

    摘要翻译: 本发明的一个实施例提供了一种用于合成分数频率的锁相环(PLL)。 PLL可以包括1 / N分频器,压控振荡器(VCO),可编程相位混频器和相位检测器。 可编程相位混频器可以耦合在VCO的输出端和分频器的输入端之间,其中可编程相位混频器配置成从VCO接收输出时钟信号,并通过改变相位产生频率为f1的第一时钟信号 的输出时钟信号。 分频器被配置为从可编程相位混合器接收第一时钟信号,并产生频率为f2 = f1 / N的第二时钟信号。 相位检测器可以接收参考时钟信号和第二个时钟信号作为输入,并且相位检测器的输出可用于产生VCO的控制电压。

    Highly flexible fractional N frequency synthesizer
    2.
    发明授权
    Highly flexible fractional N frequency synthesizer 有权
    高灵活度的分数N频率合成器

    公开(公告)号:US08477898B2

    公开(公告)日:2013-07-02

    申请号:US12819683

    申请日:2010-06-21

    IPC分类号: H03D3/24

    CPC分类号: H03L7/183 H03L7/081

    摘要: One embodiment of the present invention provides a phase-locked loop (PLL) for synthesizing a fractional frequency. The PLL can include a 1/N frequency divider, a voltage-controlled oscillator (VCO), a programmable phase mixer, and a phase detector. The programmable phase mixer can be coupled between an output of the VCO and an input of the frequency divider, wherein the programmable phase mixer is configured to receive the output clock signal from the VCO and generate a first clock signal of frequency f1 by varying a phase of the output clock signal. The frequency divider is configured to receive the first clock signal from the programmable phase mixer and generate a second clock signal of frequency f2=f1/N. The phase detector can receive a reference clock signal and the second clock signal as inputs, and the phase detector's output can be used to generate the control voltage for the VCO.

    摘要翻译: 本发明的一个实施例提供了一种用于合成分数频率的锁相环(PLL)。 PLL可以包括1 / N分频器,压控振荡器(VCO),可编程相位混频器和相位检测器。 可编程相位混频器可以耦合在VCO的输出端和分频器的输入端之间,其中可编程相位混频器配置成从VCO接收输出时钟信号,并通过改变相位产生频率为f1的第一时钟信号 的输出时钟信号。 分频器被配置为从可编程相位混合器接收第一时钟信号,并产生频率为f2 = f1 / N的第二时钟信号。 相位检测器可以接收参考时钟信号和第二个时钟信号作为输入,并且相位检测器的输出可用于产生VCO的控制电压。

    PATTERN AGNOSTIC ON-DIE SCOPE
    3.
    发明申请
    PATTERN AGNOSTIC ON-DIE SCOPE 有权
    模式合成模型

    公开(公告)号:US20110311009A1

    公开(公告)日:2011-12-22

    申请号:US12819660

    申请日:2010-06-21

    IPC分类号: H04L7/00

    CPC分类号: H04L1/205 G01R13/0218

    摘要: An on-die scope is described. The on-die scope can include one or more scope slicers, phase sweeping circuitry, voltage sweeping circuitry, and eye-diagram data collection circuitry. The clock and data recovery circuitry can receive an input signal, and output a recovered clock signal and a recovered bit-stream. The phase sweeping circuitry can receive the recovered clock signal, and output the scope clock signal by adding a phase offset to the recovered clock signal. A scope slicer can receive the voltage threshold, the scope clock signal, and the input signal, and output a scope bit-stream. The eye-diagram data collection circuitry can detect one or more bit-patterns in the recovered bit-stream, and modify values of one or more scope counters based solely or partly on the scope bit-stream and the recovered bit-stream.

    摘要翻译: 描述了一个模内范围。 在线范围可以包括一个或多个范围限幅器,相位扫描电路,电压扫描电路和眼图数据收集电路。 时钟和数据恢复电路可以接收输入信号,并输出恢复的时钟信号和恢复的比特流。 相位扫描电路可以接收恢复的时钟信号,并通过向恢复的时钟信号添加相位偏移来输出示波器时钟信号。 示波器限幅器可以接收电压阈值,示波器时钟信号和输入信号,并输出示波器位流。 眼图数据收集电路可以检测恢复的比特流中的一个或多个比特模式,并且单独或部分地基于范围比特流和恢复的比特流来修改一个或多个范围计数器的值。

    Pattern agnostic on-die scope
    4.
    发明授权
    Pattern agnostic on-die scope 有权
    图案不可知的在线范围

    公开(公告)号:US08184757B2

    公开(公告)日:2012-05-22

    申请号:US12819660

    申请日:2010-06-21

    IPC分类号: H04L7/00

    CPC分类号: H04L1/205 G01R13/0218

    摘要: An on-die scope is described. The on-die scope can include one or more scope slicers, phase sweeping circuitry, voltage sweeping circuitry, and eye-diagram data collection circuitry. The clock and data recovery circuitry can receive an input signal, and output a recovered clock signal and a recovered bit-stream. The phase sweeping circuitry can receive the recovered clock signal, and output the scope clock signal by adding a phase offset to the recovered clock signal. A scope slicer can receive the voltage threshold, the scope clock signal, and the input signal, and output a scope bit-stream. The eye-diagram data collection circuitry can detect one or more bit-patterns in the recovered bit-stream, and modify values of one or more scope counters based solely or partly on the scope bit-stream and the recovered bit-stream.

    摘要翻译: 描述了一个模内范围。 在线范围可以包括一个或多个范围限幅器,相位扫描电路,电压扫描电路和眼图数据收集电路。 时钟和数据恢复电路可以接收输入信号,并输出恢复的时钟信号和恢复的比特流。 相位扫描电路可以接收恢复的时钟信号,并通过向恢复的时钟信号添加相位偏移来输出示波器时钟信号。 示波器限幅器可以接收电压阈值,示波器时钟信号和输入信号,并输出示波器位流。 眼图数据收集电路可以检测恢复的比特流中的一个或多个比特模式,并且单独或部分地基于范围比特流和恢复的比特流来修改一个或多个范围计数器的值。

    Method and apparatus for performing adaptive equalization
    5.
    发明授权
    Method and apparatus for performing adaptive equalization 有权
    用于执行自适应均衡的方法和装置

    公开(公告)号:US08208591B2

    公开(公告)日:2012-06-26

    申请号:US12819629

    申请日:2010-06-21

    IPC分类号: H04B1/10

    摘要: Systems and techniques for adapting and/or optimizing an equalizer of a receiver are described. The equalizer's behavior can be adjusted by modifying one or more equalization parameters. At the beginning of the adaptation and/or optimization process, the system can determine robust initial values for the one or more equalization parameters. The system can then adapt and/or optimize the equalizer by iteratively adjusting the one or more equalization parameters. Specifically, in each iteration, the system can use the receiver's clock and data recovery (CDR) circuitry to determine the number of early and late data transitions associated with one or more data patterns. Next, the system can adjust the one or more equalization parameters so that, for each data pattern in the one or more data patterns, the ratio between the number of early data transitions and the number of late data transitions is substantially equal to a desired value.

    摘要翻译: 描述了用于适配和/或优化接收机的均衡器的系统和技术。 可以通过修改一个或多个均衡参数来调整均衡器的行为。 在适应和/或优化过程的开始时,系统可以确定一个或多个均衡参数的鲁棒的初始值。 然后,系统可以通过迭代地调整一个或多个均衡参数来适应和/或优化均衡器。 具体来说,在每个迭代中,系统可以使用接收机的时钟和数据恢复(CDR)电路来确定与一个或多个数据模式相关联的早期和晚期数据转换的数量。 接下来,系统可以调整一个或多个均衡参数,使得对于一个或多个数据模式中的每个数据模式,早期数据转换的数量与后期数据转换的数量之间的比率基本上等于期望值 。

    METHOD AND APPARATUS FOR PERFORMING ADAPTIVE EQUALIZATION
    6.
    发明申请
    METHOD AND APPARATUS FOR PERFORMING ADAPTIVE EQUALIZATION 有权
    用于执行自适应均衡的方法和装置

    公开(公告)号:US20110310947A1

    公开(公告)日:2011-12-22

    申请号:US12819629

    申请日:2010-06-21

    IPC分类号: H03H7/30

    摘要: Systems and techniques for adapting and/or optimizing an equalizer of a receiver are described. The equalizer's behavior can be adjusted by modifying one or more equalization parameters. At the beginning of the adaptation and/or optimization process, the system can determine robust initial values for the one or more equalization parameters. The system can then adapt and/or optimize the equalizer by iteratively adjusting the one or more equalization parameters. Specifically, in each iteration, the system can use the receiver's clock and data recovery (CDR) circuitry to determine the number of early and late data transitions associated with one or more data patterns. Next, the system can adjust the one or more equalization parameters so that, for each data pattern in the one or more data patterns, the ratio between the number of early data transitions and the number of late data transitions is substantially equal to a desired value.

    摘要翻译: 描述了用于适配和/或优化接收机的均衡器的系统和技术。 可以通过修改一个或多个均衡参数来调整均衡器的行为。 在适应和/或优化过程的开始时,系统可以确定一个或多个均衡参数的鲁棒的初始值。 然后,系统可以通过迭代地调整一个或多个均衡参数来适应和/或优化均衡器。 具体来说,在每个迭代中,系统可以使用接收机的时钟和数据恢复(CDR)电路来确定与一个或多个数据模式相关联的早期和晚期数据转换的数量。 接下来,系统可以调整一个或多个均衡参数,使得对于一个或多个数据模式中的每个数据模式,早期数据转换的数量与后期数据转换的数量之间的比率基本上等于期望值 。