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1. 发明授权

US06774830B2 Methods and systems for digital dither 有权
标题翻译：数字抖动的方法和系统
公开(公告)号：US06774830B2
公开(公告)日：2004-08-10
申请号：US10372229
申请日：2003-02-25
申请人： Todd Lee Brooks
发明人： Todd Lee Brooks
IPC分类号： H03M120
CPC分类号： H03M1/0641 , H03M1/74 , H03M3/332 , H03M3/424
摘要： Methods and systems for applying digital dither includes methods and systems for applying digital dither in data converters, such as, for example, delta-sigma data converters. In an embodiment, an analog signal from a first path of a delta-sigma modulator is quantized to an m-bit digital signal and an n-bit dithered digital feedback signal is generated from at least a portion of the m-bit digital signal. The n-bit dithered digital feedback signal is converted to an analog feedback signal and fed back to a second path of the delta-sigma modulator. In an embodiment, the n-bit dithered digital feedback signal is generated by selecting one of a plurality of sets of n-bits from the m-bit digital signal depending upon a state of a dither control signal. The dither control signal can alternate between a plurality of states or pseudo-randomly switch between a plurality of states. In an embodiment, the m-bit digital signal is an m-bit thermometer code signal and the n-bit dithered digital feedback signal is generated by selecting between bits 0 through m−2 and bits 1 through m−1 of the m-bit digital signal. In an alternative embodiment, the m-bit digital signal is an m-bit thermometer code signal and the n-bit dithered digital feedback signal is generated by selecting between even and odd bits of the m-bit digital signal.
摘要翻译：应用数字抖动的方法和系统包括在数据转换器（例如，Δ-Σ数据转换器）中应用数字抖动的方法和系统。在一个实施例中，来自Δ-Σ调制器的第一路径的模拟信号被量化为m位数字信号，并且从m位数字信号的至少一部分产生n位抖动数字反馈信号。 n位抖动数字反馈信号被转换成模拟反馈信号并反馈到Δ-Σ调制器的第二路径。在一个实施例中，根据抖动控制信号的状态，通过从m位数字信号中选择多个n位组中的一个产生n位抖动数字反馈信号。抖动控制信号可以在多个状态之间交替，或者在多个状态之间进行伪随机切换。在一个实施例中，m位数字信号是m位温度计代码信号，并且n位抖动数字反馈信号是通过在位0至m-2和m位的位1至m-1之间进行选择而产生的数字信号。在替代实施例中，m位数字信号是m位温度计代码信号，并且通过在m位数字信号的偶数位和奇数位之间进行选择来产生n位抖动数字反馈信号。

2. 发明授权

US06650265B1 Method and architecture for varying power consumption of a current mode digital/analog converter in proportion to performance parameters 有权
标题翻译：与性能参数成比例地改变电流模式数/模转换器的功耗的方法和架构
公开(公告)号：US06650265B1
公开(公告)日：2003-11-18
申请号：US10133976
申请日：2002-04-25
申请人： Alexander Bugeja
发明人： Alexander Bugeja
IPC分类号： H03M120
CPC分类号： H03M1/002 , H03M1/007 , H03M1/687 , H03M1/745 , H03M1/747
摘要： A method and circuit structure scale the power consumption of a current mode digital/analog converter (DAC) in proportion to performance parameters, such as sampling speed (i.e., clock samples per second) and resolution (number of bits) under programmable control. In one embodiment, a current mode segmented DAC provided approaches the performance of custom implementations designed for specific combinations of these parameters, across a wide range of such parameters by varying current relative to the sampling rate and the resolution and by selectively enabling current sources in the DAC.
摘要翻译：一种方法和电路结构与当前模式数/模转换器（DAC）的功耗成比例地与可编程控制下的采样速度（即每秒的时钟采样数）和分辨率（位数））等性能参数成正比。在一个实施例中，提供的当前模式分段DAC提供了针对这些参数的特定组合设计的定制实现的性能，通过相对于采样率和分辨率改变电流，并且通过选择性地使得 DAC。

3. 发明授权

US06404364B1 Multistage converter employing digital dither 有权
标题翻译：采用数字抖动的多级转换器
公开(公告)号：US06404364B1
公开(公告)日：2002-06-11
申请号：US09645003
申请日：2000-08-24
申请人： H. Scott Fetterman , David Arthur Rich
发明人： H. Scott Fetterman , David Arthur Rich
IPC分类号： H03M120
CPC分类号： H03M1/0641 , H03M1/0695 , H03M1/167 , H03M1/442
摘要： A multistage converter and method for converting a sampled analog signal to a corresponding digital representation. Each stage of the converter receives an analog input signal and produces a partial digital output. A first stage receives the sampled analog signal as the analog input signal. Each stage provides a residue output, which is the analog input signal to a subsequent stage. The residue is the analog input signal to the stage, less the analog equivalent of the partial digital output from the stage, possibly with a gain change. A voltage range over which a sample of an analog signal can vary is defined by a lower limit and an upper limit. A lower comparator threshold is established within the voltage range. An upper comparator threshold is established within the voltage range, between the lower comparator threshold and the upper limit. The analog input to the stage is quantized based on the lower and upper comparator thresholds to generate a quantized sampled analog signal. When the quantizes sampled analog signal is between the lower and upper comparator thresholds, dither is added to the quantized sampled analog signal to produce the partial digital output. The partial digital outputs from each stage are provided to an error corrector circuit that removes redundancy and effects of the dither and generates the digital representation corresponding to the sampled analog input. The effect of dither is to improve the spurious free dynamic range (SFDR) of the digital representation of the analog input.
摘要翻译：一种用于将采样的模拟信号转换成相应的数字表示的多级转换器和方法。转换器的每个级接收模拟输入信号并产生部分数字输出。第一级接收采样的模拟信号作为模拟输入信号。每个阶段提供一个残留输出，这是后续阶段的模拟输入信号。剩余部分是到阶段的模拟输入信号，少于级的部分数字输出的模拟等效，可能增益变化。模拟信号的样本可以变化的电压范围由下限和上限定义。在电压范围内建立较低的比较器阈值。在较低的比较器阈值和上限之间的电压范围内建立较高的比较器阈值。基于较低和较高的比较器阈值对该级的模拟输入进行量化，以产生量化的采样模拟信号。当量化采样的模拟信号在下比较器阈值和上限比较器阈值之间时，抖动被加到量化的采样模拟信号上以产生部分数字输出。来自每个级的部分数字输出被提供给错误校正器电路，其消除抖动的冗余和影响，并产生对应于采样的模拟输入的数字表示。抖动的影响是改善模拟输入的数字表示的无杂散动态范围（SFDR）。

4. 发明授权

US06268814B1 Carrier-dependent dithering for analog-to-digital conversion 有权
标题翻译：用于模数转换的载波相关抖动
公开(公告)号：US06268814B1
公开(公告)日：2001-07-31
申请号：US09524152
申请日：2000-03-14
申请人： Arild T. Kolsrud
发明人： Arild T. Kolsrud
IPC分类号： H03M120
CPC分类号： H03M1/0641 , H03M1/12
摘要： An analog-to-digital converter (ADC) includes a dither signal generator configured to add an analog dither signal to the analog input signal of the ADC prior to digitization (i.e., quantization). The amplitude of the dither signal is selected based upon the power levels of one or more carriers present in the bandwidth for which the ADC is designed to operate. Addition of the dither signal to the input signal in the analog domain reduces quantization noise such as conversion spurs that result from non-linearities in the ADC transfer function.
摘要翻译：模数转换器（ADC）包括抖动信号发生器，其被配置为在数字化（即，量化）之前将模拟抖动信号添加到ADC的模拟输入信号。抖动信号的幅度基于存在于ADC被设计为工作的带宽中的一个或多个载波的功率电平来选择。将模拟信号中的抖动信号添加到模拟域中的输入信号可减少量化噪声，例如由ADC传递函数中的非线性引起的转换杂散。

5. 发明授权

US06172629B2 Multistage analog-to-digital converter employing dither 失效
标题翻译：采用抖动的多级模数转换器
公开(公告)号：US06172629B2
公开(公告)日：2001-01-09
申请号：US09025956
申请日：1998-02-19
申请人： H. Scott Fetterman
发明人： H. Scott Fetterman
IPC分类号： H03M120
CPC分类号： H03M1/0641 , H03M1/0695 , H03M1/167 , H03M1/442
摘要： There is disclosed, a converter for converting an input signal from one form to another. The converter includes a slicing circuit adapted to slice a signal into levels. The slicing circuit includes at least one threshold for establishing slicing levels. Dither is employed to vary at least one slicing level in the slicing circuit.
摘要翻译：公开了一种用于将输入信号从一种形式转换成另一种形式的转换器。该转换器包括一个适于将信号切割成电平的分片电路。切片电路包括用于建立切片电平的至少一个阈值。抖动被用于在切片电路中改变至少一个切片电平。

6. 发明授权

US06831576B2 A/D converter with improved resolution by sampling a superposed signal 有权
标题翻译： A / D转换器，通过对叠加信号进行取样来提高分辨率
公开(公告)号：US06831576B2
公开(公告)日：2004-12-14
申请号：US10713335
申请日：2003-11-13
申请人： Albert Geiger , Reinhard Rieger , Michael Fehrenbach , Juergen Landsgesell
发明人： Albert Geiger , Reinhard Rieger , Michael Fehrenbach , Juergen Landsgesell
IPC分类号： H03M120
CPC分类号： H03M1/0639 , H03M1/12
摘要： A method for improving the resolution of an A/D converter and/or a converter system having an S/H device and an A/D converter is described. In order to improve the resolution of the A/D converter, an auxiliary signal is superposed on an analog signal, and the superposed signal is sampled and converted into digital output values using the A/D converter. Based on the digital output values, it is possible to determine an output value having higher resolution, e.g., by averaging.
摘要翻译：描述了一种用于提高具有S / H设备和A / D转换器的A / D转换器和/或转换器系统的分辨率的方法。为了提高A / D转换器的分辨率，将辅助信号叠加在模拟信号上，并且使用A / D转换器对叠加信号进行采样并转换为数字输出值。基于数字输出值，可以例如通过平均来确定具有较高分辨率的输出值。

7. 发明授权

US06577257B2 Methods and systems for digital dither 有权
公开(公告)号：US06577257B2
公开(公告)日：2003-06-10
申请号：US09949816
申请日：2001-09-12
申请人： Todd Lee Brooks
发明人： Todd Lee Brooks
IPC分类号： H03M120
CPC分类号： H03M1/0641 , H03M1/74 , H03M3/332 , H03M3/424
摘要： Methods and systems for applying digital dither includes methods and systems for applying digital dither in data converters, such as, for example, delta-sigma data converters. In an embodiment, an analog signal from a first path of a delta-sigma modulator is quantized to an m-bit digital signal and an n-bit dithered digital feedback signal is generated from at least a portion of the m-bit digital signal. The n-bit dithered digital feedback signal is converted to an analog feedback signal and fed back to a second path of the delta-sigma modulator. In an embodiment, the n-bit dithered digital feedback signal is generated by selecting one of a plurality of sets of n-bits from the m-bit digital signal depending upon a state of a dither control signal. The dither control signal can alternate between a plurality of states or pseudo-randomly switch between a plurality of states. In an embodiment, the m-bit digital signal is an m-bit thermometer code signal and the n-bit dithered digital feedback signal is generated by selecting between bits 0 through m−2 and bits 1 through m−1 of the m-bit digital signal. In an alternative embodiment, the m-bit digital signal is an m-bit thermometer code signal and the n-bit dithered digital feedback signal is generated by selecting between even and odd bits of the m-bit digital signal.

8. 发明授权

US06331831B1 A/D conversion through dithering 失效
标题翻译：通过抖动进行A / D转换
公开(公告)号：US06331831B1
公开(公告)日：2001-12-18
申请号：US09684181
申请日：2000-10-07
申请人： Zoran Cvetkovic , Ingrid Daubechies
发明人： Zoran Cvetkovic , Ingrid Daubechies
IPC分类号： H03M120
CPC分类号： H03M1/201
摘要： A/D conversion is achieved by employing a piecewise continuous dither signal such that a signal that results from combining the dither signal with the signal to be converted, has a zero-crossing within each interval Ij=(jT,(j+1)T), where j is an integer, T=&pgr;/&lgr;B, B is the bandwidth of the signal to be converted, and &lgr; is a constant that is greater than 1, and those zero crossings in adjacent intervals Ij are always separated by some minimal distance, &egr;, for all intervals Ij. Zero crossings of the combined signal are detected, and the instances where those crossings occur are encoded; one zero crossing for each interval.
摘要翻译：通过采用分段连续抖动信号来实现A / D转换，使得将抖动信号与要转换的信号组合的信号在每个间隔内具有零交叉Ij =（jT，（j + 1）T ），其中j是整数，T = pi / lambdB，B是要转换的信号的带宽，并且lambd是大于1的常数，并且相邻间隔Ij中的那些过零点总是被一些最小的距离，epsi，对于所有间隔Ij。检测到组合信号的零交叉，并且对这些交叉发生的情况进行编码; 每个间隔一个零交叉。

9. 发明授权

US06307492B1 Device to compensate for the non-linearity of an analog/digital converter 失效
标题翻译：用于补偿模拟/数字转换器的非线性的装置
公开(公告)号：US06307492B1
公开(公告)日：2001-10-23
申请号：US09576441
申请日：2000-05-22
申请人： Robert Berranger , Jean-Luc de Gouy
发明人： Robert Berranger , Jean-Luc de Gouy
IPC分类号： H03M120
CPC分类号： H03M1/0641 , H03M1/12
摘要： The method consists of the adding of a dither signal of constant amplitude, frequency-modulated by noise, to the signal applied to the input of the converter. An automatic control link is set up between the level of the added interference signal and the signal applied to the input of the converter so that the level of the input signal added to the level of the added interference signal is equal to the level of the full scale signal of the converter. Application to digital communications radio receivers.
摘要翻译：该方法包括将由噪声进行频率调制的恒定幅度抖动信号添加到施加到转换器输入端的信号。在添加的干扰信号的电平和施加到转换器的输入的信号的电平之间建立自动控制链路，使得添加到相加干扰信号的电平的输入信号的电平等于满量程的电平转换器的标度信号。应用于数字通信无线电接收机。

10. 发明授权

US06297758B1 Electrooptical scanning analog-to-digital converter 有权
标题翻译：电光扫描模数转换器
公开(公告)号：US06297758B1
公开(公告)日：2001-10-02
申请号：US09392862
申请日：1999-09-09
申请人： Robert H. Sternowski
发明人： Robert H. Sternowski
IPC分类号： H03M120
CPC分类号： H03M1/32
摘要： An electrooptical scanning analog-to-digital converter for converting an analog voltage signal from a source to its corresponding digital equivalent in accordance with the invention includes a laser providing a beam having an initial position and multiple deflected positions. The voltage signal forms a deflection input to the laser. A first voltage of the voltage signal provides for the initial position of the beam and multiple other voltages of the voltage signal provide for the plurality of deflected positions of the beam. The invention also includes a phototarget array that has a first phototarget mapped to the first voltage of the voltage signal and multiple incremental phototargets each mapped to one of the multiple other voltages of the voltage signal. The first phototarget and the multiple incremental phototargets are arranged along an axis, which may be in one implementation substantially perpendicular to the initial position of the beam. When the beam is deflected from the initial position that illuminates the first phototarget, to one of the multiple deflected positions by one of the multiple voltages of the voltage signal, at least one of the multiple incremental phototargets is illuminated to provide one of multiple illuminated phototarget array values for conversion of the voltage signal to its corresponding digital equivalent.
摘要翻译：根据本发明的用于将来自源的模拟电压信号转换成其对应的数字等效物的电光扫描模数转换器包括提供具有初始位置和多个偏转位置的光束的激光器。电压信号形成对激光器的偏转输入。电压信号的第一电压提供光束的初始位置，电压信号的多个其他电压为光束的多个偏转位置提供。本发明还包括光靶阵列，其具有映射到电压信号的第一电压的第一光靶和分别映射到电压信号的多个其它电压之一的多个增量光靶。第一光靶和多增量光靶沿轴线布置，其可以在基本上垂直于梁的初始位置的一个实施方式中。当光束从照亮第一光靶的初始位置偏转到电压信号的多个电压之一的多个偏转位置中的一个时，多个增量光靶中的至少一个被照亮以提供多个照明的光靶中的一个用于将电压信号转换为其对应的数字等效物的数组值。

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