公开(公告)号：US20130051436A1

公开(公告)日：2013-02-28

申请号：US13217853

申请日：2011-08-25

申请人： Dermot O'KEEFFE ,  Tudor VINEREANU

发明人： Dermot O'KEEFFE ,  Tudor VINEREANU

IPC分类号： H04B1/38 ,  H03H7/40 ,  H04L25/49

CPC分类号： H04L25/49 ,  H04L25/03343 ,  H04L25/08 ,  H04L27/2071

摘要： A method to adjust a waveform transmitted from a field device to overcome cable bandwidth limitations by passing data to be transmitted through a channel compensation device which pre-distorts data to be transmitted to compensate for the bandwidth limitations. The predistortion may make sure that there is a good quality signal received at the control end of the cable.

摘要翻译： 一种用于调整从现场设备发送的波形的方法，以通过传递要通过通道补偿装置发送的数据来克服电缆带宽限制，该信道补偿装置预先歪曲要发送的数据以补偿带宽限制。 预失真可以确保在电缆的控制端接收到良好的质量信号。

公开(公告)号：US08971445B2

公开(公告)日：2015-03-03

申请号：US13217853

申请日：2011-08-25

申请人： Dermot O'Keeffe ,  Tudor Vinereanu

发明人： Dermot O'Keeffe ,  Tudor Vinereanu

IPC分类号： H04K1/02 ,  H04L25/49 ,  H04L25/03 ,  H04L25/08 ,  H04L27/20

CPC分类号： H04L25/49 ,  H04L25/03343 ,  H04L25/08 ,  H04L27/2071

摘要： A method to adjust a waveform transmitted from a field device to overcome cable bandwidth limitations by passing data to be transmitted through a channel compensation device which pre-distorts data to be transmitted to compensate for the bandwidth limitations. The predistortion may make sure that there is a good quality signal received at the control end of the cable.

摘要翻译： 调整从现场设备发送的波形的方法，以通过传送通过预先歪曲要发送的数据以补偿带宽限制的信道补偿设备传送的数据来克服电缆带宽限制。 预失真可以确保在电缆的控制端接收到良好的质量信号。

公开(公告)号：US20130300512A1

公开(公告)日：2013-11-14

申请号：US13469914

申请日：2012-05-11

申请人： Dermot O'KEEFFE ,  Donal BOURKE

发明人： Dermot O'KEEFFE ,  Donal BOURKE

IPC分类号： H03B5/36

CPC分类号： H03K3/011 ,  H03B5/364 ,  H03B2202/05 ,  H03K3/012 ,  H03K3/013

摘要： A clock generator is disclosed for use with an oscillator device. The clock generator may include a signal conditioning pre-filter and a comparator. The signal conditioner may have an input for a signal from the oscillator device, and may include a high pass filter component and a low pass filter component. The high pass filter component may pass amplitude and frequency components of the input oscillator signal but reject a common mode component of the oscillator signal. Instead, the high pass filter component further may generate its own common mode component locally over which the high frequency components are superimposed. The low pass filter component may generate a second output signal that represents the locally-generated common mode component of the first output signal. The clock generator may have a comparator as an input stage which is coupled to first and second outputs of the filter structure.

摘要翻译： 公开了与振荡器装置一起使用的时钟发生器。 时钟发生器可以包括信号调节预滤波器和比较器。 信号调节器可以具有来自振荡器装置的信号的输入，并且可以包括高通滤波器部件和低通滤波器部件。 高通滤波器分量可以传递输入振荡器信号的振幅和频率分量，但是抑制振荡器信号的共模分量。 相反，高通滤波器分量还可以在本地产生其自身的共模分量，在该共模分量上叠加高频分量。 低通滤波器分量可以产生表示第一输出信号的局部产生的共模分量的第二输出信号。 时钟发生器可以具有比较器作为输入级，其耦合到滤波器结构的第一和第二输出。

公开(公告)号：US20130271155A1

公开(公告)日：2013-10-17

申请号：US13626434

申请日：2012-09-25

申请人： Dermot O'Keeffe ,  Donal Bourke ,  David Harty ,  Tudor Vinereanu ,  Colin Lyden

发明人： Dermot O'Keeffe ,  Donal Bourke ,  David Harty ,  Tudor Vinereanu ,  Colin Lyden

IPC分类号： G01R27/02

CPC分类号： G01R27/28

摘要： A digital sine wave may be converted to an analog signal at a digital to analog converter (DAC). The converted analog signal may be supplied to a device and an analog return signal from the device may be passed through a relaxed anti-aliasing filter and converted to digital code words at an analog to digital converter (ADC). An impedance may be calculated from the results of a Fourier analysis of the digital code words. The ADC and DAC clock frequencies may be asynchronous, independently variable, and have a greatest common factor of 1. The clock frequencies of the ADC and/or DAC may be adjusted to change a location of images in the ADC spectrum. By using these different, adjustable clock frequencies for the ADC and the DAC, an analog signal may have increased aliasing without introducing signal errors at a frequency of interest.

摘要翻译： 数字正弦波可以在数模转换器（DAC）转换为模拟信号。 转换的模拟信号可以被提供给设备，并且来自设备的模拟返回信号可以通过松弛的抗混叠滤波器并且在模数转换器（ADC）处被转换成数字码字。 可以根据数字码字的傅立叶分析的结果来计算阻抗。 ADC和DAC时钟频率可以是异步的，可独立变化的，并且具有最大的共同因子1. ADC和/或DAC的时钟频率可以被调整以改变ADC频谱中图像的位置。 通过为ADC和DAC使用这些不同的可调时钟频率，模拟信号可能会增加混叠，而不会在感兴趣的频率下引入信号错误。

公开(公告)号：US20110143688A1

公开(公告)日：2011-06-16

申请号：US13060081

申请日：2008-08-26

申请人： Dermot O'keeffe ,  Alexander Brophy ,  Brian Flannelly

发明人： Dermot O'keeffe ,  Alexander Brophy ,  Brian Flannelly

IPC分类号： H04W24/00

CPC分类号： H04B17/21 ,  H04B17/10

摘要： A calibration apparatus for calibrating a communications terminal comprises a data store arranged to store amplifier unspecific power control data, and a processing resource arranged to receive a first indication of a first desired output power level and a second indication of a second desired output power level. The processing resource retrieves from the data store a first amplifier unspecific value associated with the first desired output power level and a second amplifier unspecific value associated with the second desired output power level. An amplifier is operably coupled to the processing resource and arranged to generate a first output signal and a second output signal corresponding to the first and second retrieved values. The processing resource is arranged to receive a first measured value and a second measured value. Also, the processing resource is arranged to support an interpolator for performing an interpolation using the first and second measured values.

摘要翻译： 用于校准通信终端的校准装置包括布置成存储放大器非特定功率控制数据的数据存储器，以及布置成接收第一期望输出功率电平的第一指示和第二期望输出功率电平的第二指示的处理资源。 处理资源从数据存储器检索与第一期望输出功率电平相关联的第一放大器非特定值和与第二期望输出功率电平相关联的第二放大器非特定值。 放大器可操作地耦合到处理资源并被布置成产生对应于第一和第二检索值的第一输出信号和第二输出信号。 处理资源被布置成接收第一测量值和第二测量值。 此外，处理资源被布置成支持使用第一和第二测量值来执行内插的内插器。

公开(公告)号：US08823465B2

公开(公告)日：2014-09-02

申请号：US13469914

申请日：2012-05-11

申请人： Donal Bourke ,  Dermot O'Keeffe

发明人： Donal Bourke ,  Dermot O'Keeffe

IPC分类号： H03B5/30 ,  H03K3/011 ,  H03K3/012 ,  H03K3/013

CPC分类号： H03K3/011 ,  H03B5/364 ,  H03B2202/05 ,  H03K3/012 ,  H03K3/013

摘要： A clock generator is disclosed for use with an oscillator device. The clock generator may include a signal conditioning pre-filter and a comparator. The signal conditioner may have an input for a signal from the oscillator device, and may include a high pass filter component and a low pass filter component. The high pass filter component may pass amplitude and frequency components of the input oscillator signal but reject a common mode component of the oscillator signal. Instead, the high pass filter component further may generate its own common mode component locally over which the high frequency components are superimposed. The low pass filter component may generate a second output signal that represents the locally-generated common mode component of the first output signal. The clock generator may have a comparator as an input stage which is coupled to first and second outputs of the filter structure.

摘要翻译： 公开了与振荡器装置一起使用的时钟发生器。 时钟发生器可以包括信号调节预滤波器和比较器。 信号调节器可以具有来自振荡器装置的信号的输入，并且可以包括高通滤波器部件和低通滤波器部件。 高通滤波器分量可以传递输入振荡器信号的振幅和频率分量，但是抑制振荡器信号的共模分量。 相反，高通滤波器分量还可以在本地产生其自身的共模分量，在该共模分量上叠加高频分量。 低通滤波器分量可以产生表示第一输出信号的局部产生的共模分量的第二输出信号。 时钟发生器可以具有比较器作为输入级，其耦合到滤波器结构的第一和第二输出。

公开(公告)号：US08463193B2

公开(公告)日：2013-06-11

申请号：US13060081

申请日：2008-08-26

申请人： Dermot O'Keeffe ,  Alexander Brophy ,  Brian Flannelly

发明人： Dermot O'Keeffe ,  Alexander Brophy ,  Brian Flannelly

IPC分类号： H04B17/00

CPC分类号： H04B17/21 ,  H04B17/10

摘要： A calibration apparatus for calibrating a communications terminal comprises a data store arranged to store amplifier unspecific power control data, and a processing resource arranged to receive a first indication of a first desired output power level and a second indication of a second desired output power level. The processing resource retrieves from the data store a first amplifier unspecific value associated with the first desired output power level and a second amplifier unspecific value associated with the second desired output power level. An amplifier is operably coupled to the processing resource and arranged to generate a first output signal and a second output signal corresponding to the first and second retrieved values. The processing resource is arranged to receive a first measured value and a second measured value. Also, the processing resource is arranged to support an interpolator for performing an interpolation using the first and second measured values.

摘要翻译： 用于校准通信终端的校准装置包括布置成存储放大器非特定功率控制数据的数据存储器，以及布置成接收第一期望输出功率电平的第一指示和第二期望输出功率电平的第二指示的处理资源。 处理资源从数据存储器检索与第一期望输出功率电平相关联的第一放大器非特定值和与第二期望输出功率电平相关联的第二放大器非特定值。 放大器可操作地耦合到处理资源并被布置成产生对应于第一和第二检索值的第一输出信号和第二输出信号。 处理资源被布置成接收第一测量值和第二测量值。 此外，处理资源被布置成支持使用第一和第二测量值来执行内插的内插器。