专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US10630306B2 Method and system for spectral leakage removal in DAC testing 有权
公开(公告)号：US10630306B2
公开(公告)日：2020-04-21
申请号：US14482861
申请日：2014-09-10
申请人： Advantest (Singapore) Pte. Ltd.
发明人： Ming Lu
IPC分类号： H03M1/10 , G01R35/00 , H03M1/66
CPC分类号： H03M1/1085 , G01R35/005 , H03M1/66
摘要： System and method for processing a signal sampled from an output of a digital-analog converter. The method comprises: (a) transforming the input signal from time domain to frequency domain to obtain a signal having a plurality of bins; (b) estimating properties of a largest amplitude bin, except for direct current (DC) bin, in the input signal; (c) performing signal reconstruction in time domain based on the estimated properties to generate a reconstructed signal; (d) subtracting the estimated signal from the input signal to get a residual signal; (e) repeating steps (a)-(d) till a predetermined number of bins have been processed; (f) adding all the reconstructed signals and the last residual signal together to generate a sum signal; and (g) transforming the sum signal from the time domain to the frequency domain.

2. 发明授权

US08788234B2 Method of calibrating interleaved digitizer channels 有权
标题翻译：校准交错数字转换器通道的方法
公开(公告)号：US08788234B2
公开(公告)日：2014-07-22
申请号：US12905611
申请日：2010-10-15
申请人： John J. Pickerd
发明人： John J. Pickerd
IPC分类号： G06F15/00
CPC分类号： G01R13/0272 , G01R31/3191 , G01R35/002 , H03M1/0626 , H03M1/1033 , H03M1/1085 , H03M1/1215
摘要： In a multi-channel oscilloscope a method of calibrating interleaved digitizer channels initially calibrates each digitizer channel to produce a bandwidth enhanced filter for each digitizer channel to match the respective channel frequency and phase characteristics. The oscilloscope is then configured for interleaved operation whereby an input signal is applied to at least two digitizers via a switch through a common preamplifier to produce a reference digitizer channel and an interleaved digitizer channel where the bandwidth enhanced filter for the interleaved digitizer channel is now not correct. Fast Fourier transforms are performed on the data from the reference digitizer channel and the interleaved digitizer channel, from which are derived a match filter for the interleaved digitizer channel so the interleaved digitizer channel and reference digitizer channel are matched in phase and magnitude at all frequencies.
摘要翻译：在多通道示波器中，校准交错数字转换器通道的方法最初校准每个数字转换器通道以产生用于每个数字转换器通道的带宽增强滤波器，以匹配相应的通道频率和相位特性。然后将示波器配置成用于交错操作，由此通过公共前置放大器经由开关将输入信号施加到至少两个数字转换器，以产生参考数字转换器通道和交错数字转换器通道，其中用于交错数字转换器通道的带宽增强滤波器现在不是正确。对来自参考数字转换器通道和交错数字转换器通道的数据执行快速傅立叶变换，从而从交错数字转换器通道导出匹配滤波器，使得交织的数字转换器通道和参考数字转换器通道在所有频率的相位和幅度上匹配。

3. 发明授权

US07720645B2 Test apparatus for digitized test responses, method for testing semiconductor devices and diagnosis method for a semiconductor device 有权
标题翻译：用于数字化测试响应的测试装置，半导体器件测试方法和半导体器件的诊断方法
公开(公告)号：US07720645B2
公开(公告)日：2010-05-18
申请号：US11534005
申请日：2006-09-21
申请人： Stephane Kirmser , Heinz Mattes , Sebastian Sattler
发明人： Stephane Kirmser , Heinz Mattes , Sebastian Sattler
IPC分类号： G01R31/28
CPC分类号： G01R31/318371 , H03M1/1085 , H03M1/12
摘要： A test apparatus for testing digitized test responses has a generator and a signal extractor. The generator uses direct digital synthesis to generate a set of n digital reference signals which are orthogonal to one another. In this case, n is a natural number greater than 1. The signal extractor contains a test input and reference inputs. The test input receives a digitized test response and the reference inputs are connected to the reference signals which are generated by the generator. The signal extractor generates scalar products from a respective reference signal and the test response and uses the products to calculate whether a combination of reference signals is contained in the test response.
摘要翻译：用于测试数字化测试响应的测试装置具有发生器和信号提取器。发生器使用直接数字合成来产生彼此正交的一组n个数字参考信号。在这种情况下，n是大于1的自然数。信号提取器包含测试输入和参考输入。测试输入接收数字化的测试响应，参考输入连接到由发生器产生的参考信号。信号提取器从相应的参考信号和测试响应产生标量产物，并使用产品来计算参考信号的组合是否包含在测试响应中。

4. 发明申请

US20070247344A1 Method of Generating a Digital Signal that is Representative of Match Errors in an Analog Digital Conversion System With Time Interleaving, and an Analog Digital Converter with Time Interleaving Using Same 失效
标题翻译：在具有时间交织的模拟数字转换系统中产生代表匹配错误的数字信号的方法以及使用相同时间交错的模拟数字转换器
公开(公告)号：US20070247344A1
公开(公告)日：2007-10-25
申请号：US10581549
申请日：2004-11-30
申请人： Patrick Gremillet
发明人： Patrick Gremillet
IPC分类号： H03M1/12
CPC分类号： H03M1/1052 , H03M1/1085 , H03M1/1215
摘要： The invention relates to a method for generating a digital signal representative of the pairing error between the channels of an analog digital conversion system with time interleaving, a method for suppressing the errors thus calculated and an analog digital conversion system with time interleaving using same. The present invention proposes a less complex digital solution since it does not require the extraction of the defects of the signal at the output of the converter. It makes it possible to correct the pairing errors by the direct creation of digital signals representative of these errors, and their subtraction from the digitized signal at the output of the conversion system. An object of the invention is a method for generating a digital signal representative of the pairing error between the channels of an analog digital conversion system with time interleaving (CAN 10) comprising an analog digital converter (CAN1, CAN2,...,CANN) on each channel. The said method comprises the determination of the spectrum (11-12) of said digital signal as a function of the frequency response of the analog digital conversion system with time interleaving (CAN 10) to at least one analog calibration signal (IC).
摘要翻译：本发明涉及一种用于产生代表模拟数字转换系统的信道与时间交织之间的配对误差的数字信号的方法，一种用于抑制如此计算的误差的方法和使用其的时间交织的模拟数字转换系统。本发明提出了一种较不复杂的数字解决方案，因为它不需要在转换器的输出处提取信号的缺陷。通过直接创建表示这些错误的数字信号，以及从转换系统的输出端的数字化信号中减去配对误差，可以实现这一点。本发明的目的是一种用于产生代表模拟数字转换系统的通道与时间交错（CAN 10）之间的配对误差的数字信号的方法，包括模拟数字转换器（CAN＆lt; 1＆gt; 每个通道上的CAN _{2 ，...，CAN _{N ）。所述方法包括根据随时间交织（CAN 10）至少一个模拟校准信号（IC）的模拟数字转换系统的频率响应的函数来确定所述数字信号的频谱（11-12）。}}

5. 发明授权

US06819279B2 Method and apparatus for the recovery of signals acquired by an interleaved system of digitizers with mismatching frequency response characteristics 有权
标题翻译：用于恢复由具有不同频率响应特性的数字化仪的交错系统获取的信号的方法和装置
公开(公告)号：US06819279B2
公开(公告)日：2004-11-16
申请号：US10379648
申请日：2003-03-05
申请人： Peter J. Pupalaikis
发明人： Peter J. Pupalaikis
IPC分类号： H03M112
CPC分类号： H03M1/1038 , H03M1/1085 , H03M1/1215
摘要： A method and apparatus of processing waveforms acquired in a waveform digitizing instrument utilizing multiple, interleaved digitizing elements is provided to improve the accuracy of the data acquired is provided. The present method utilizes measured analog-to-digital converter frequency response characteristics to generate sets of coefficients. When data is acquired by a waveform digitizing system, the present method utilizes these coefficients to correct the waveform, thus undoing the adverse effects of the non-ideal frequency response characteristics, resulting in a waveform acquired with higher fidelity. The waveform resulting from this method is a waveform that more closely represents the signal sampled by the digitizing system.
摘要翻译：提供了一种处理在采用多个交错数字化元素的波形数字化仪器中获取的波形的方法和装置，以提供所提取的数据的准确度。本方法利用测量的模 - 数转换器频率响应特性来产生一组系数。当通过波形数字化系统获取数据时，本方法利用这些系数来校正波形，从而消除非理想频率响应特性的不利影响，导致以更高保真度获取的波形。由该方法产生的波形是更接近地表示由数字化系统采样的信号的波形。

6. 发明申请

US20040174284A1 METHOD AND APPARATUS FOR THE RECOVERY OF SIGNALS ACQUIRED BY AN INTERLEAVED SYSTEM OF DIGITIZERS WITH MISMATCHING FREQUENCY RESPONSE CHARACTERISTICS 有权
标题翻译：用于对具有不正确的频率响应特性的数字摄像机的交互系统采集信号进行恢复的方法和装置
公开(公告)号：US20040174284A1
公开(公告)日：2004-09-09
申请号：US10379648
申请日：2003-03-05
发明人： Peter J. Pupalaikis
IPC分类号： H03M001/00
CPC分类号： H03M1/1038 , H03M1/1085 , H03M1/1215
摘要： A method and apparatus of processing waveforms acquired in a waveform digitizing instrument utilizing multiple, interleaved digitizing elements is provided to improve the accuracy of the data acquired is provided. The present method utilizes measured analog-to-digital converter frequency response characteristics to generate sets of coefficients. When data is acquired by a waveform digitizing system, the present method utilizes these coefficients to correct the waveform, thus undoing the adverse effects of the non-ideal frequency response characteristics, resulting in a waveform acquired with higher fidelity. The waveform resulting from this method is a waveform that more closely represents the signal sampled by the digitizing system.
摘要翻译：提供了一种处理在采用多个交错数字化元素的波形数字化仪器中获取的波形的方法和装置，以提供所提取的数据的准确度。本方法利用测量的模 - 数转换器频率响应特性来产生一组系数。当通过波形数字化系统获取数据时，本方法利用这些系数来校正波形，从而消除非理想频率响应特性的不利影响，导致以更高保真度获取的波形。由该方法产生的波形是更接近地表示由数字化系统采样的信号的波形。

7. 发明申请

US20040161028A1 Method and apparatus for use in DSP-based testing 审中-公开
标题翻译：用于基于DSP的测试的方法和设备
公开(公告)号：US20040161028A1
公开(公告)日：2004-08-19
申请号：US10777094
申请日：2004-02-13
发明人： Gordon Roberts , Chris Taillefer
IPC分类号： H04Q001/20
CPC分类号： H03M1/1085 , G01R29/26 , G01R31/3167 , H03M1/12 , H03M1/66
摘要： An apparatus suitable for use in identifying a noise component originating from a certain source of noise in a DSP-based mixed-signal system is provided. The apparatus includes a processing unit which receives a first signal released by a first signal path, the first signal path including a digital-to-analog converter and a first analog-to-digital converter. The processing unit also receives a second signal released by a second signal path, the second signal path including the digital-to-analog converter and a second analog-to-digital converter. The first signal and the second signal are processed to derive a noise component associated to a certain source of noise, the certain source of noise being a selected one of the digital-to-analog converter, the first analog-to-digital converter and the second analog-to-digital converter. A signal indicative of the noise component associated to the certain source of noise is then released.
摘要翻译：提供了一种适用于识别基于DSP的混合信号系统中源自某一噪声源的噪声分量的装置。该装置包括处理单元，其接收由第一信号路径释放的第一信号，第一信号路径包括数模转换器和第一模数转换器。处理单元还接收由第二信号路径释放的第二信号，第二信号路径包括数模转换器和第二模数转换器。处理第一信号和第二信号以导出与特定噪声源相关联的噪声分量，该特定噪声源是数模转换器，第一模数转换器和第二模数转换器。然后释放指示与某个噪声源相关联的噪声分量的信号。

8. 发明授权

US06177894B1 Evaluation system and method for AD converter 有权
标题翻译： AD转换器的评估系统和方法
公开(公告)号：US06177894B1
公开(公告)日：2001-01-23
申请号：US09183644
申请日：1998-10-30
申请人： Takahiro Yamaguchi
发明人： Takahiro Yamaguchi
IPC分类号： H03M110
CPC分类号： H03M1/1085 , H03M1/12
摘要： An instantaneous differential non-linearity DNL can be determined with a high accuracy with a reduced volume of computation and independently from a testing frequency while allowing an evaluation of factors in a compounded fault. A sine signal is applied to an AD converter 14 under test, a conversion output of which is divided into a sine component and a cosine component, with local maxima or minima aligned with each other. A square sum of the individual samples is formed, and a square root of the square sum is formed to determine an instantaneous amplitude (21). The amplitude of the sine wave signal is interleaved into a series of instantaneous amplitudes (20), and a first stage of the wavelet transform (46) is applied to the interleaved series of instantaneous amplitudes, with its output being oversampled to perform a second stage of wavelet transform (46′). A maximum amplitude of the transform output is detected by peak detector 23′. A detected value is used to estimate the DNL.
摘要翻译：瞬时微分非线性DNL可以以较低的计算量和精度独立于测试频率以高精度确定，同时允许对复合故障中的因素进行评估。正弦信号被施加到被测试的AD转换器14，其转换输出被分成正弦分量和余弦分量，其中局部最大值或最小值彼此对准。形成各个样本的平方和，形成平方和的平方根以确定瞬时振幅（21）。正弦波信号的振幅被交织成一系列瞬时振幅（20），小波变换（46）的第一级被施加到交错的瞬时振幅系列，其输出被过采样以执行第二级的小波变换（46'）。峰值检测器23'检测变换输出的最大幅度。检测值用于估计DNL。

9. 发明授权

US09698809B1 Systems and methods for analog to digital converter failure identification 有权
公开(公告)号：US09698809B1
公开(公告)日：2017-07-04
申请号：US15213993
申请日：2016-07-19
申请人： Schweitzer Engineering Laboratories, Inc.
发明人： Travis C Mallett
IPC分类号： H03M1/10 , H03M1/12 , H03M3/00
CPC分类号： H03M1/1071 , H03M1/1076 , H03M1/1085 , H03M1/12 , H03M1/1245 , H03M3/458
摘要： Disclosed are systems and methods for identifying and reporting failures of an analog to digital (A/D) conversion system. An A/D conversion system includes a test signal generator configured to generate a test signal including an identifiable characteristic, an A/D converter configured to convert an analog signal measured at an input of the A/D converter to a digital output, and signal injection circuitry configured to inject at least a portion of the test signal from the test signal generator as an injected signal into the analog signal using trace-to-trace crosstalk. A method includes determining whether the digital output generated by the A/D converter indicates the identifiable characteristic.

10. 发明授权

US09160358B2 Close-in tones 有权
标题翻译：接近的色调
公开(公告)号：US09160358B2
公开(公告)日：2015-10-13
申请号：US14656025
申请日：2015-03-12
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Sthanunathan Ramakrishnan , Jawaharlal Tangudu , Sashidharan Venkatraman , Karthik Khanna Subramani , Sreenath Narayanan Potty
IPC分类号： H03M1/06 , H03M1/10 , H03M1/12
CPC分类号： H03M1/1085 , H03M1/1038 , H03M1/1215
摘要： A system can include a close-in tone control configured to detect a set of close-in tones of an interleaved analog to digital converter (IADC) signal and output a trigger signal in response to the detection. The system can also include a close-in tone mismatch estimator configured to determine a correlation and a power estimate for the set of close-in tones in the IADC signal in response to the trigger signal.
摘要翻译：系统可以包括配置成检测交错模数转换器（IADC）信号的一组接近音调的接近音调控制，并且响应于该检测而输出触发信号。该系统还可以包括接近音调失配估计器，其被配置为响应于触发信号来确定IADC信号中的接近音调集合的相关性和功率估计。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式