公开(公告)号：US08810442B1

公开(公告)日：2014-08-19

申请号：US13766948

申请日：2013-02-14

申请人： PMC-Sierra US, Inc.

发明人： Anthony Eugene Zortea

IPC分类号： H03M1/08

CPC分类号： H03M1/06 ,  H03M1/0809 ,  H03M1/361

摘要： A method of background calibration of aperture center errors in a data communication system is provided. In an implementation, in response to detection of a low sampler output (“0”) in between two high sampler outputs (“1”), the method includes: calculating a signal derivative of an ADC output signal at the time of the detected low output; and adjusting timing at a selected sampler based on the calculated signal derivative. In an example implementation, the method includes watching for bubbles in the thermometer code output, and estimating the first derivative of the signal at the time of the bubble, then estimating the sign of the errors. In an example implementation, the errors are used in a control loop to reduce the aperture center error.

摘要翻译： 提供了一种数据通信系统中孔径中心误差的背景校准方法。 在一个实现中，响应于检测两个高采样器输出（“1”）之间的低采样器输出（“0”），该方法包括：在检测到的低电平时计算ADC输出信号的信号导数 输出; 以及基于所计算的信号导数来调整所选采样器的定时。 在示例实现中，该方法包括观察温度计代码输出中的气泡，以及估计气泡时的信号的一阶导数，然后估计误差的符号。 在一个示例实现中，错误用于控制环路以减小光圈中心误差。

公开(公告)号：US09271163B1

公开(公告)日：2016-02-23

申请号：US13909537

申请日：2013-06-04

申请人： PMC-SIERRA, US, INC.

发明人： Russell Romano ,  Anthony Eugene Zortea

IPC分类号： H04L25/08 ,  H04W24/00

CPC分类号： H04B17/318 ,  H04B1/0007 ,  H04B1/16 ,  H04L1/0045 ,  H04L25/067 ,  H04L27/06 ,  H04W24/00

摘要： The peak level of a high frequency analog signal in an RF receiver is detected by a system which samples the signal and compares it against a static threshold, generating an above/below status. The system is implemented with a sampler of sufficient aperture bandwidth to capture the signal in question, operated at a clock frequency, dynamically chosen as a function of fLO (local oscillator frequency) and the desired fIF (intermediate frequency), to minimize in-band intermodulation products. The sampler produces kickback intermodulation products that are positioned out-of-band, or are of low enough power in-band so as to be inconsequential. Samples are taken for a statistically significant period of time, and the status is used to adapt the threshold to systematically determine the peak amplitude of the signal being observed.

摘要翻译： RF接收机中的高频模拟信号的峰值电平由对信号进行采样并将其与静态阈值进行比较的系统检测，产生上/下状态。 该系统采用具有足够的孔径带宽的采样器来捕获在时钟频率下运行的所述信号，其作为fLO（本地振荡器频率）和期望的fIF（中间频率）的函数动态选择，以使带内最小化 互调产品。 采样器产生位于带外的或者具有足够低功率带内的反冲互调产物，从而无关紧要。 样本采集统计学显着的时间段，状态用于调整阈值以系统地确定观察到的信号的峰值幅度。

公开(公告)号：US08816886B1

公开(公告)日：2014-08-26

申请号：US13833401

申请日：2013-03-15

申请人： PMC-Sierra US, Inc.

发明人： William D. Warner ,  Anthony Eugene Zortea ,  Jim Guziak

IPC分类号： H03M1/10 ,  H03M1/18

CPC分类号： H03M1/1057 ,  H03M1/183 ,  H03M1/361

摘要： A method and apparatus for controlling the effective gain of an ADC when the ADC is occasionally or continuously calibrated using the statistics of the input signal and when the statistics are not stationary.

摘要翻译： 当使用输入信号的统计信息和统计信号不稳定来偶尔或连续校准ADC时，用于控制ADC的有效增益的方法和装置。

公开(公告)号：US09350399B1

公开(公告)日：2016-05-24

申请号：US14578311

申请日：2014-12-19

申请人： PMC-SIERRA US, INC.

发明人： Anthony Eugene Zortea ,  Mark Hiebert

IPC分类号： H04B1/10 ,  H04B1/26

CPC分类号： H04B1/1036

摘要： A method and apparatus are provided for reducing aliasing in a direct conversion (or zero-IF) radio receiver having high and low frequency paths. According to an implementation, a non-transitory machine-readable memory stores aliasing correlation response data that associates a measured non-aliased signal in a high frequency path and a measured aliased residual of the signal in a low frequency path. A compensator is in communication with the memory to apply aliasing compensation to received signals based on the stored aliasing correlation response data. In an example implementation, the low and high frequency paths are independently optimized for low and high frequency performance, respectively, and have transfer functions that overlap with one another to create a calibration zone used to calibrate the first and second transfer functions.

摘要翻译： 提供了一种用于减少具有高频和低频路径的直接转换（或零中频）无线电接收机中的混叠的方法和装置。 根据实现，非暂时机器可读存储器存储将在高频路径中测量的非混叠信号与所测量的低频路径信号的混叠残差相关联的混叠相关响应数据。 补偿器与存储器通信，以基于所存储的混叠相关响应数据将混叠补偿应用于接收信号。 在示例实现中，分别针对低频和高频性能独立地优化低频和高频路径，并且具有彼此重叠的传递函数，以创建用于校准第一和第二传递函数的校准区域。

公开(公告)号：US08952835B1

公开(公告)日：2015-02-10

申请号：US14336205

申请日：2014-07-21

申请人： PMC-Sierra US, Inc.

发明人： Anthony Eugene Zortea

IPC分类号： H03M1/08

CPC分类号： H03M1/06 ,  H03M1/0809 ,  H03M1/361

摘要： A method of background calibration of aperture center errors in a data communication system is provided. In an implementation, in response to detection of a low sampler output (“0”) in between two high sampler outputs (“1”), the method includes: determining a direction of an ADC output signal at the time of the detected low output; and adjusting timing at a selected sampler based on the determined signal direction. In an example implementation, the method includes watching for bubbles in the thermometer code output, and estimating the first derivative of the signal at the time of the bubble, then estimating the sign of the errors. In an example implementation, the errors are used in a control loop to reduce the aperture center error.

摘要翻译： 提供了一种数据通信系统中孔径中心误差的背景校准方法。 在一个实现中，响应于在两个高采样器输出（“1”）之间检测到低采样器输出（“0”），该方法包括：确定检测到的低输出时ADC输出信号的方向 ; 以及基于所确定的信号方向来调整所选采样器的定时。 在示例实现中，该方法包括观察温度计代码输出中的气泡，以及估计气泡时的信号的一阶导数，然后估计误差的符号。 在一个示例实现中，错误用于控制环路以减小光圈中心误差。

公开(公告)号：US08779952B1

公开(公告)日：2014-07-15

申请号：US13766855

申请日：2013-02-14

申请人： PMC-Sierra US, Inc.

发明人： Anthony Eugene Zortea

IPC分类号： H03M1/06 ,  H03M1/08

CPC分类号： H03M1/1004 ,  H03M1/1057 ,  H03M1/1215 ,  H03M1/361

摘要： A method of background calibration of threshold errors in a data communication system is provided. In an implementation, the method uses sampler statistics just after foreground calibration as the reference signal in a control loop method to remove individual sampler offsets. In an implementation in which an analog to digital converter (ADC) includes a plurality of sub-ADCs, gain, offset, and individual threshold errors across parallel, time-interleaved sub-ADCs are minimized by establishing individual comparator statistics for the average sub-ADC after an initial foreground calibration, then forcing each individual comparator to maintain its statistics over time, in the background, by continuously adjusting its threshold.

摘要翻译： 提供了一种数据通信系统中阈值误差背景校准的方法。 在一个实现中，该方法使用前景校准后的采样器统计信息作为控制环路方法中的参考信号，以去除单个采样器偏移量。 在模数转换器（ADC）包括并行的多个子ADC，增益，偏移和各个阈值误差的实现中，通过为平均子ADC建立单独的比较器统计量来最小化时间交织的子ADC， ADC在初始前景校准之后，然后强制每个单独的比较器通过不断调整其阈值来在后台保持其统计。