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41. 发明申请

US20070276614A1 De-embed method for multiple probes coupled to a device under test 审中-公开
标题翻译：耦合到被测设备的多个探头的去嵌入方法
公开(公告)号：US20070276614A1
公开(公告)日：2007-11-29
申请号：US11441758
申请日：2006-05-25
申请人： Kan Tan , John J. Pickerd
发明人： Kan Tan , John J. Pickerd
IPC分类号： G06F19/00
CPC分类号： G01R35/00 , G01R27/32
摘要： A method of de-embedding test probes coupled to an oscilloscope system to compensate for the loading of the test probes on a device under test. The method includes connecting each test probe individually to the device under test and calibrating each test probes to characterize transfer parameters of the device under test within a spectral domain. The open voltage of the device under test is calculated for each test probe. The test probes are connected to the device under test ans measurement samples are acquired by each of the test probes in the time domain and converted to the spectral domain. An equalization filter is computed for each of the test probes to compensate for loading of the device under test caused by the test probes using the spectral domain open voltage and measurement samples for each of the test probes.
摘要翻译：一种解嵌入与示波器系统耦合的测试探针的方法，以补偿被测设备上的测试探针的载荷。该方法包括将每个测试探针单独连接到被测器件，并校准每个测试探针，以在频谱域内表征被测器件的传输参数。对于每个测试探针计算被测器件的开路电压。测试探针连接到被测设备，测量样品由时域中的每个测试探针采集并转换为光谱域。为每个测试探针计算均衡滤波器，以补偿由测试探针引起的受测器件的载荷，使用每个测试探针的频域开放电压和测量样本。

42. 发明申请

US20070273389A1 Apparatus and method for processing a signal under test using a trigger signal synchronous with the signal under test for arbitrary impedance loads 审中-公开
标题翻译：使用与被测信号同步的触发信号来处理被测信号的装置和方法，用于任意阻抗负载
公开(公告)号：US20070273389A1
公开(公告)日：2007-11-29
申请号：US11442517
申请日：2006-05-25
申请人： Kan Tan , John J. Pickerd
发明人： Kan Tan , John J. Pickerd
IPC分类号： G01R27/04
CPC分类号： G01R35/002 , G01R13/345 , G01R27/28
摘要： A method and apparatus adapted to calibrate a test probe and oscilloscope system such that digital samples acquired by the system are processed for representing an arbitrary impedance loading of the device under test. The method and apparatus calibrates the test probe to characterize transfer parameters of the device under test within a spectral domain. A reflection coefficient (L) is defined representative of an arbitrary impedance load coupled to the device under test and an equalization filter is computed to represent the loading of the device under test by the arbitrary impedance. Additional acquired samples are acquired using the equalization filter to effect thereby a representation of the arbitrary impedance loading of the device under test.
摘要翻译：一种适于校准测试探针和示波器系统的方法和装置，使得由系统获取的数字样本被处理以表示被测设备的任意阻抗负载。该方法和装置校准测试探针以表征在频谱域内被测器件的传输参数。反射系数（

43. 发明授权

US07271575B2 Oscilloscope based return loss analyzer 有权
标题翻译：基于示波器的回波损耗分析仪
公开(公告)号：US07271575B2
公开(公告)日：2007-09-18
申请号：US10637901
申请日：2003-08-07
申请人： John J. Pickerd , Laudie J. Doubrava
发明人： John J. Pickerd , Laudie J. Doubrava
IPC分类号： G01R23/00 , G01R23/16 , G01R27/06
CPC分类号： G01R13/22
摘要： A system, apparatus and method for performing differential return loss measurements and other measurements as a function of frequency uses a digital storage oscilloscope (DSO) having spectral analysis functions. A waveform generator generates a differential test signal in the form of a series of pulses where each pulse includes spectral components associated with each of a plurality of frequencies of interest. A test fixture presents the differential test waveform to a load including at least one of a device under test (DUT), a short circuit, an open circuit and a balanced load. A signal acquisition device differentially measures the test waveform during each of the load conditions. The signal acquisition device computes an error correction parameter using measurements made during the short circuit, open circuit and balanced load conditions. The correction parameter tends to offset signal acquisition errors within measurements made during the DUT load condition.
摘要翻译：用于执行差分回波损耗测量和作为频率的函数的其他测量的系统，装置和方法使用具有频谱分析功能的数字存储示波器（DSO）。波形发生器以一系列脉冲的形式产生差分测试信号，其中每个脉冲包括与感兴趣的多个频率中的每一个相关联的频谱分量。测试夹具将差分测试波形呈现给包括被测器件（DUT），短路，开路和平衡负载中的至少一个的负载。信号采集装置在每个负载条件下差分地测量测试波形。信号采集装置使用在短路，开路和平衡负载条件下进行的测量来计算纠错参数。在DUT负载条件下进行的测量中，校正参数倾向于抵消信号采集误差。

44. 发明授权

US07098839B2 Flash array digitizer 失效
标题翻译：闪存阵列数字化仪
公开(公告)号：US07098839B2
公开(公告)日：2006-08-29
申请号：US10861334
申请日：2004-06-03
申请人： John J. Pickerd
发明人： John J. Pickerd
IPC分类号： H03M1/36
CPC分类号： H03M1/123 , G11C27/00 , H03M1/127
摘要： Apparatus for rapidly acquiring a large number of samples of a signal under test, stores the samples in a waveform memory without converting the samples to binary form. The signal under test is applied to an arrangement of comparators and exclusive-OR gates to provide a signal indicative of amplitude. The waveform memory is arranged in rows and columns. In one embodiment, the amplitude-indicative signal serves as a row address signal for the waveform memory, and a scanning control signal serves as a column address signal for the waveform memory. In another embodiment, an X-Y display is produced in which the column address signal is responsive to the amplitude of a second signal under test.
摘要翻译：用于快速获取被测信号的大量采样的装置将样本存储在波形存储器中，而不将样本转换成二进制形式。被测信号被应用于比较器和异或门的布置，以提供指示振幅的信号。波形存储器以行和列排列。在一个实施例中，幅度指示信号用作波形存储器的行地址信号，扫描控制信号用作波形存储器的列地址信号。在另一个实施例中，产生X-Y显示器，其中列地址信号响应于被测试的第二信号的振幅。

45. 发明授权

US06681191B1 Frequency domain analysis system for a time domain measurement instrument 失效
标题翻译：时域测量仪的频域分析系统
公开(公告)号：US06681191B1
公开(公告)日：2004-01-20
申请号：US09712876
申请日：2000-11-13
申请人： John J. Pickerd , Scott A. Davidson
发明人： John J. Pickerd , Scott A. Davidson
IPC分类号： G01R2300
CPC分类号： G01R13/345
摘要： A frequency domain analysis system incorporated into time domain measurement instrument has duration and resolution controls that respectively adjust the acquisition time intervals of a waveform record in seconds and adjusts the number of digital data samples over a specified duration. The duration of the acquisition waveform may be controlled using the duration control adjustment, a sample rate adjustment and a record length adjustment. The resolution controls concurrently adjusts the sample rate and the record length of the acquisition waveform while maintaining the duration constant. A movable and variable length frequency spectrum gate is applied to the digital data samples of the acquired waveform. A window filter is applied to the digital data samples within the gated region a spectrum analysis generator generates frequency domain values over the gates waveform record. The spectrum analysis generator outputs frequency domain values defined by frequency span and center frequency controls associated with spectrum analysis generator.
摘要翻译：并入时域测量仪器中的频域分析系统具有持续时间和分辨率控制，分别以秒为单位调整波形记录的采集时间间隔，并调整指定持续时间内的数字数据样本数。可以使用持续时间控制调整，采样率调整和记录长度调整来控制采集波形的持续时间。分辨率控制同时调整采样率和采集波形的记录长度，同时保持持续时间不变。将可移动和可变长度的频谱门施加到采集波形的数字数据样本。窗口滤波器被应用于选通区域内的数字数据样本，频谱分析发生器通过门波形记录产生频域值。频谱分析发生器输出与频谱分析发生器相关的频率范围和中心频率控制定义的频域值。

46. 发明授权

US5978742A Method and apparatus for digital sampling of electrical waveforms 失效
标题翻译：电波形数字采样的方法和装置
公开(公告)号：US5978742A
公开(公告)日：1999-11-02
申请号：US833150
申请日：1997-04-04
申请人： John J. Pickerd
发明人： John J. Pickerd
IPC分类号： G01R13/02 , G01R13/34 , G01R19/25 , G01R13/20 , G01R13/00
CPC分类号： G01R13/029 , G01R13/0272 , G01R13/342 , G01R19/2506 , G01R19/2509
摘要： A method and apparatus for digitally sampling electrical waveforms. A sampling circuit for sampling an electrical signal, a digitizing circuit for digitizing the samples produced by the sampling circuit and an acquisition memory for storing the samples are employed, the acquisition memory being partitioned into a plurality of frames. Each frame is triggered to store samples associated with a respective triggering event. After substantially all of the frames have been triggered, the contents of the acquisition memory are retrieved from the acquisition memory, filtered in an equalization filter and stored in a waveform memory for ultimate display as an ET record under software control. A plurality of digitizing circuits associated with respective inputs of a multi-channel digital sampling oscilloscope are interleaved to increase the sampling rate.
摘要翻译：一种用于数字采样电波形的方法和装置。采用用于对电信号进行取样的采样电路，用于数字化采样电路产生的样本的数字化电路和用于存储采样的采集存储器，采集存储器被划分成多个帧。每个帧被触发以存储与相应的触发事件相关联的样本。在基本上所有帧被触发之后，采集存储器的内容从采集存储器检索，在均衡滤波器中滤波，并存储在波形存储器中，以在软件控制下作为ET记录进行最终显示。与多通道数字采样示波器的相应输入相关联的多个数字化电路被交织以增加采样率。

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