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11. 发明授权

US4882585A Method and apparatus for high resolution analog-digital-analog transformations 失效
标题翻译：用于高分辨率模数转换的方法和装置
公开(公告)号：US4882585A
公开(公告)日：1989-11-21
申请号：US169865
申请日：1988-03-17
申请人： Terry D. Beard
发明人： Terry D. Beard
IPC分类号： H03M3/00 , H03M1/00
CPC分类号： H03M1/208 , H03M1/661
摘要： A method and system for encoding a series of input digital signals in a higher order digital format, such as 16 bit, to a series of lower order digital signals such as 8 bit, and then recovering the original input signals with a greater accuracy than previously attainable is described. A distinct reduction in quantization noise is produced, making the system compatible with very high resolution audio equipment such as compact disks. For each input signal, a particular pair of complementary encoding and decoding transformations are selected from a set of numerous possible transformations. The transformations are nonlinear, with high resolutions near the origin and much lower resolutions further away. The high resolution range increases from table to table, while the absolute resolution within said ranges decreases. The value of each input signal is predicted from previous signals, and a differential quantity representing the prediction error is used in selecting the table for each signal. Overall quantization noise is significantly reduced by updating the table selections so that the differential quantity remains within the high resolution range. Identical decoding circuitry is provided in both the encoder and decoder to assure tracking between the two. An analog-to-digital conversion is provided at the input, with a reverse conversion at the output.
摘要翻译：一种用于将诸如16位的高阶数字格式的一系列输入数字信号编码为诸如8位的一系列低阶数字信号的方法和系统，然后以比以前更高的精度恢复原始输入信号描述可达到的。产生了量化噪声的显着降低，使系统与非常高分辨率的音频设备（如光盘）兼容。对于每个输入信号，从一组许多可能的变换中选择一对特定的互补编码和解码变换。这些变换是非线性的，在原点附近具有高分辨率，远离更低的分辨率。高分辨率范围从表到表增加，而所述范围内的绝对分辨率降低。从先前的信号预测每个输入信号的值，并且在为每个信号选择表时使用表示预测误差的差分量。通过更新表选择使得差分量保持在高分辨率范围内，总体量化噪声显着降低。在编码器和解码器中均提供相同的解码电路，以确保两者之间的跟踪。在输入端提供模数转换，在输出端进行反向转换。

12. 发明授权

US4562456A Analog-to-digital conversion apparatus including a circuit to substitute calculated values when the dynamic range of the converter is exceeded 失效
标题翻译：模数转换装置包括当超过转换器的动态范围时替代计算值的电路
公开(公告)号：US4562456A
公开(公告)日：1985-12-31
申请号：US542706
申请日：1983-10-17
申请人： Thomas V. Bolger
发明人： Thomas V. Bolger
IPC分类号： H03M1/10 , H03M1/00 , H03M1/20 , H04B14/04 , H04N7/26 , H03K13/24
CPC分类号： H03M1/208
摘要： The quantizing resolution of an analog-to-digital converter is effectively enhanced for sinusoidal input signals by (a) sampling the signal at 90 degree intervals of the sinusoid; (b) establishing the input range of the converter to be less than the dynamic range of the signal but arranged so that at least three of four successive samples are true or correct values; (c) detecting the occurrence of saturated fourth sample values; (d) calculating correct values for saturated sample values from preceding samples; and (e) substituting calculated values for saturated incorrect values.
摘要翻译：通过（a）以正弦曲线的90度间隔采样信号，对正弦输入信号有效地增强了模数转换器的量化分辨率; （b）将转换器的输入范围建立成小于信号的动态范围，但是布置成使得四个连续采样中的至少三个为真或正确的值; （c）检测饱和第四样本值的发生; （d）从前面的样品计算饱和样品值的正确值; 和（e）将计算值代入饱和不正确值。

13. 发明申请

US20180262204A1 SENSOR DEVICE 审中-公开
公开(公告)号：US20180262204A1
公开(公告)日：2018-09-13
申请号：US15979562
申请日：2018-05-15
申请人： Murata Manufacturing Co., Ltd.
发明人： Yasuhide TAKASE , Yasuyuki MATSUYA
IPC分类号： H03M3/00 , G01D5/24
CPC分类号： H03M3/32 , G01D5/24 , H03M1/208 , H03M1/804 , H03M3/422 , H03M3/496
摘要： A sensor device includes an A/D converter including an adder that computes a difference between an analog input signal and a predicted value, the adder includes a capacitive adder defined by a series circuit including a capacitive charge output device and a capacitor. A capacitive component in the charge output device defines a portion of the capacitance of the capacitive adder. A digital prediction filter generates the predicted value based on an output from a quantizer. The capacitive adder computes the difference between the analog input signal from the charge output device and the predicted value. The quantizer quantizes and encodes the difference. The A/D converter performs a Δ modulation on the analog input signal which is converted into a digital signal.

14. 发明授权

US08447570B2 Predictive sensor readout 有权
标题翻译：预测传感器读数
公开(公告)号：US08447570B2
公开(公告)日：2013-05-21
申请号：US12124892
申请日：2008-05-21
申请人： Dirk Hammerschmidt
发明人： Dirk Hammerschmidt
IPC分类号： H03F1/26 , H02J7/00 , G05B13/02
CPC分类号： H03M1/208 , G01D1/00 , G01R19/2506
摘要： A predictive sensor readout is suitable for coupling to a sensor. The predictive sensor readout includes a sampling circuit, a predictor, and a preset circuit. The sampling circuit is configured to receive and over-sample previously digitized samples of signals previously input from the sensor. The predictor is coupled to the sampling circuit and is configured to receive the over-sampled digitized samples into a signal history and to generate a predicted input from the sensor based on the signal history. The preset circuit is coupled to the predictor and the sampling circuit and is configured to present the sampling circuit to receive the predicted input from the sensor prior to sampling an actual input from the sensor.
摘要翻译：预测传感器读数适用于耦合到传感器。预测传感器读出器包括采样电路，预测器和预设电路。采样电路被配置为接收和过采样先前从传感器输入的信号的数字化样本。预测器耦合到采样电路，并且被配置为将过采样的数字化样本接收到信号历史中，并且基于信号历史从传感器生成预测输入。预设电路耦合到预测器和采样电路，并被配置为在采样来自传感器的实际输入之前呈现采样电路以接收来自传感器的预测输入。

15. 发明申请

US20110148682A1 PREDICTIVE ANALOG-TO-DIGITAL CONVERTER AND METHODS THEREOF 失效
标题翻译：预测模数转数转换器及其方法
公开(公告)号：US20110148682A1
公开(公告)日：2011-06-23
申请号：US12642780
申请日：2009-12-19
申请人： Kenneth Wayne Rigby , Robert Gideon Wodnicki , Krishnakumar Sundaresan , Naresh Kesavan Rao
发明人： Kenneth Wayne Rigby , Robert Gideon Wodnicki , Krishnakumar Sundaresan , Naresh Kesavan Rao
IPC分类号： H03M1/12
CPC分类号： H03M1/188 , H03M1/183 , H03M1/208 , H03M1/361 , H03M1/68
摘要： Predictive Analog-to-Digital Converter system in one embodiment includes a sampling section producing a sampled analog input signal with a first summer section combining the sampled analog input signal and an analog prediction signal to produce an analog prediction error signal. There is at least one error analog-to-digital convertor digitizing the analog prediction error signal, wherein a digital error signal output from the error analog-to-digital convertor is one of a full bitwidth error signal during an over-range condition else a lower bitwidth error signal. A second summer is coupled to the digital error signal output and a digital prediction signal, and generates a full bitwidth digital output signal. A feedback section is coupled to the digital output signal and providing the digital prediction signal and the analog prediction signal.
摘要翻译：在一个实施例中，预测模数转换器系统包括产生采样模拟输入信号的采样部分，其中组合采样的模拟输入信号和模拟预测信号的第一加法部分产生模拟预测误差信号。至少有一个误差模拟数字转换器将模拟预测误差信号数字化，其中从误差模数转换器输出的数字误差信号是在超范围条件期间的完全位宽误差信号之一，否则较低的位宽错误信号。第二个夏天耦合到数字误差信号输出和数字预测信号，并产生完整的位宽数字输出信号。反馈部分耦合到数字输出信号并提供数字预测信号和模拟预测信号。

16. 发明申请

US20070188364A1 HIGH DYNAMIC RANGE ANALOG TO DIGITAL CONVERTER ARCHITECTURE 有权
标题翻译：高动态范围模拟到数字转换器架构
公开(公告)号：US20070188364A1
公开(公告)日：2007-08-16
申请号：US11357553
申请日：2006-02-16
申请人： Bruce Fette
发明人： Bruce Fette
IPC分类号： H03M1/12
CPC分类号： H03M1/185 , H03M1/0658 , H03M1/208
摘要： An analog-to-digital converter (“ADC”) architecture as described herein utilizes a digital signal processor having suitably configured waveform prediction logic that can predict expected types of input signals. The ADC architecture subtracts the predictable signal components from the analog input signal prior to the analog-to-digital conversion, which extends the dynamic range of the ADC employed by the ADC architecture. In practice, the ADC architecture can subtract predictable strong signal components from an analog input signal such that the ADC can apply its available dynamic range to the remaining weak signal components.
摘要翻译：如本文所述的模数转换器（“ADC”）架构利用具有适当配置的波形预测逻辑的数字信号处理器，其可以预测输入信号的预期类型。 ADC架构在模数转换之前从模拟输入信号中减去可预测的信号分量，这扩展了ADC架构采用的ADC的动态范围。实际上，ADC架构可以从模拟输入信号中减去可预测的强信号分量，使得ADC可以将其可用的动态范围应用于剩余的弱信号分量。

17. 发明申请

US20050057387A1 INCREASING THE SNR OF SUCCESSIVE APPROXIMATION TYPE ADCS WITHOUT COMPROMISING THROUGHPUT PERFORMANCE SUBSTANTIALLY 有权
标题翻译：提高连续逼近型ADCS的信噪比，而不会影响实质性能
公开(公告)号：US20050057387A1
公开(公告)日：2005-03-17
申请号：US10663729
申请日：2003-09-17
申请人： Seetharaman Janakiraman , Kiran Godbole , Surendranath Nagesh
发明人： Seetharaman Janakiraman , Kiran Godbole , Surendranath Nagesh
IPC分类号： H03M1/06 , H03M1/20 , H03M1/34 , H03M1/12
CPC分类号： H03M1/06 , H03M1/0656 , H03M1/208
摘要： When converting an analog signal to N-bit digital codes, high SNR (signal to noise ratio) by generating multiple N-bit codes from the same analog sample and averaging the N-bit codes. However, the entire N-bit code is determined only a single time, and only P-bit (P less than N) codes are generated. The P-bit codes may be averaged, and the N-bit code is corrected based on the average value to generate an accurate N-bit digital code. As P can be much less than N, the correction can be implemented in a few iterations, thereby enabling the ADCs to be implemented with a high throughput performance. Due to the correction, a high SNR may be attained as well.
摘要翻译：通过从相同的模拟采样产生多个N位代码并对N位代码进行平均，将模拟信号转换为N位数字码，具有高SNR（信噪比）。然而，整个N位代码仅被确定一次，并且仅产生P位（P小于N）个代码。可以对P位代码进行平均，并且基于平均值校正N位代码以产生精确的N位数字代码。由于P可以远小于N，所以可以在几次迭代中实现校正，从而使得能够以高吞吐量性能实现ADC。由于校正，也可以获得高SNR。

18. 发明授权

US06590513B2 Data acquisition system using predictive conversion 有权
公开(公告)号：US06590513B2
公开(公告)日：2003-07-08
申请号：US10141394
申请日：2002-05-08
申请人： Philip S. Stetson , Teddy D. Thomas
发明人： Philip S. Stetson , Teddy D. Thomas
IPC分类号： H03M300
CPC分类号： H03M1/208 , H03M1/20
摘要： A data acquisition system uses an analog-to-digital converter (ADC) that includes a prediction feedback element. Using the computing power of a digital signal processor, the system predicts the next sample of the target signal based on pre-defined rules and previous samples. This digital prediction is converted to an analog signal using a digital-to-analog converter (DAC). An analog error summer compares the predicted signal with the target signal and creates an error signal. The digital signal processor uses the prediction error to more accurately predict the next sample. A negative feedback loop is thus formed by this system to drive the prediction error toward zero. Operating on the relatively small error signal in the forward and feedback paths enhances the conversion performance and data transfer efficiency.

19. 发明授权

US6115726A Signal processor with local signal behavior 失效
标题翻译：具有本地信号行为的信号处理器
公开(公告)号：US6115726A
公开(公告)日：2000-09-05
申请号：US144360
申请日：1998-08-31
申请人： Aleksandar Ignjatovic
发明人： Aleksandar Ignjatovic
IPC分类号： G06F17/10 , H03F3/217 , H03H17/00 , H03H17/02 , H03H17/06 , H03H21/00 , H03M1/06 , H03M1/08 , H03M1/20 , H03M1/66
CPC分类号： H03M1/661 , G06F17/10 , H03F3/217 , H03H17/06 , H03M1/208
摘要： A new signal processing method and a signal processing engine which can achieve extremely fast responsiveness to instantaneous changes in the behavior of the signal, and maintain the accuracy of standard harmonic methods. The signal processing engine unifies Nyquist's theorem and Taylor's theorem by means of polynomial approximations using linear operators, e.g. differential and integral operators. The signal processing engine samples the signal at a rate which is n times the band limit of the signal, where n is greater than 2, i.e. greater than the Nyquist rate, produces a digital representation of the sampled signal, and calculates the outputs of linear operators applied to polynomial approximations of the sampled signal. A switch mode power amplifier which incorporates the signal processing method and engine of the overcomes shortcomings of existing switching amplifiers, e.g. class "D" amplifiers. These shortcomings include: poor handling of highly reactive complex loads (e.g., speakers), usually requiring a duty cycle or feed-back adjustment with the change of the load; poor performance in the upper part of the bandwidth, including numerous switching artifacts; and high distortion, especially in the upper part of the spectrum. These shortcomings are all overcome using the local signal behavior signal processing method and engine of the invention.
摘要翻译：一种新的信号处理方法和信号处理引擎，可以实现对信号行为的瞬时变化的极快响应，并保持标准谐波方法的准确性。信号处理引擎通过使用线性算子的多项式近似来统一奈奎斯特定理和泰勒定理，例如，差分和积分算子。信号处理引擎以n倍于信号的频带限制的速率对信号进行采样，其中n大于2，即大于奈奎斯特速率，产生采样信号的数字表示，并计算线性的输出运算符应用于采样信号的多项式近似。一种开关模式功率放大器，其结合了克服现有开关放大器的缺点的信号处理方法和引擎，例如，类“D”放大器。这些缺点包括：对高反应性复合负载（例如扬声器）的处理差，通常需要负载周期或负载的改变进行反馈调整; 在带宽的上部表现不佳，包括大量的切换伪影; 并且具有高失真，特别是在光谱的上部。这些缺点都使用本发明的本地信号行为信号处理方法和引擎来克服。

20. 发明授权

US4933675A Audio digital/analog encoding and decoding 失效
标题翻译：音频数字/模拟编码和解码
公开(公告)号：US4933675A
公开(公告)日：1990-06-12
申请号：US364715
申请日：1989-06-09
申请人： Terry D. Beard
发明人： Terry D. Beard
IPC分类号： H03M1/20 , H04B14/04
CPC分类号： H04B14/046 , H03M1/208
摘要： Apparatus and an associated method are described for encoding an analog signal to a digital representation thereof and then decoding the same to reconstruct the original analog signal with reduced quantization noise and error. The analog signal is first adaptively pre-emphasized. A series of samples of the pre-emphasized signal are then obtained and encoded to create a series of digital representations which have a lower order resolution than the samples. The difference between each sample and its corresponding lower resolution digital representation is obtained and combined with the next sample. Decoding of the combined signals takes place in a complementary manner to create an approximate analog output signal, which is then de-emphasized in a manner complementary to the pre-emphasis to produce an analog output signal closely approximating the original analog signal. In a fully digital implementation the samples are converted to a digital format with a higher order resolution; the digital representations are obtained from the digitized samples, and the difference measurements are combined with the samples in their digital format. In a hybrid digital/analog implementation the difference is combined with the analog signal prior to sampling.
摘要翻译：描述了用于将模拟信号编码为其数字表示的装置和相关方法，然后对其进行解码以用缩小的量化噪声和误差来重建原始模拟信号。模拟信号首先被自适应地预先强调。然后获得并重新编码预加重信号的一系列样本以产生具有比样本低的分辨率的一系列数字表示。获得每个样本与其对应的较低分辨率数字表示之间的差异，并与下一个样本组合。组合信号的解码以互补方式进行，以产生近似的模拟输出信号，然后以与预加重相互补充的方式去强调产生近似于原始模拟信号的模拟输出信号。在完全数字化的实现中，样本被转换成具有较高分辨率的数字格式; 从数字化样本中获得数字表示，并将差值测量与其数字格式的样本组合。在混合数字/模拟实现中，差异在采样之前与模拟信号组合。

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