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1. 发明授权

US5621408A Delta sigma analog-to-digital converter with temporally interleaved architecture 失效
标题翻译：具有时间交错架构的Delta西格玛模数转换器
公开(公告)号：US5621408A
公开(公告)日：1997-04-15
申请号：US394427
申请日：1995-02-24
申请人： Brian V. Cake , Jean-Francois Goumaz , Walter O. LeCroy
发明人： Brian V. Cake , Jean-Francois Goumaz , Walter O. LeCroy
IPC分类号： H03M1/08 , G01R13/02 , H03M3/02 , H03M3/00
CPC分类号： H03M3/47 , H03M3/43 , H03M3/456
摘要： A delta sigma converter according to the present invention replaces the quantizer of a conventional delta sigma converter, such as a comparator followed by a latch, with N quantizers, each operating at a reduced frequency f.sub.s /N and phase offset from each other by 2.pi./N. The quantized outputs are assembled in accordance with a control signal to produce a feedback signal at a frequency f.sub.s and the feedback signal is applied to a subtractor of the delta sigma converter.
摘要翻译：根据本发明的Δ-Σ转换器用N个量化器代替常规Δ-Σ转换器的量化器，比如比较器后跟一个锁存器，每个量化器都以降低的频率fs / N和相位彼此相差2 pi / N。量化输出根据控制信号进行组合以产生频率为fs的反馈信号，反馈信号被施加到Δ-Σ转换器的减法器。

2. 发明授权

US5218363A High-speed switching tree with input sampling pulses of constant frequency and means for varying the effective sampling rate 失效
标题翻译：具有恒定频率的输入采样脉冲的高速开关树和用于改变有效采样率的装置
公开(公告)号：US5218363A
公开(公告)日：1993-06-08
申请号：US760165
申请日：1991-09-16
申请人： Walter O. LeCroy, Jr. , Brian V. Cake
发明人： Walter O. LeCroy, Jr. , Brian V. Cake
IPC分类号： H03K17/041 , H03K17/60 , H03M1/12
CPC分类号： H03M1/1215 , H03K17/04113 , H03K17/603
摘要： Current switching apparatus including at least one current switching tree comprised of cascaded sets of switching circuits, with an input set operable with sampling clock pulses supplied at a fixed frequency and the remaining cascaded sets operable at different frequencies, and further including a sample skipping circuit interconnected between successive sets for reducing the effective sampling frequency of the switching tree while maintaining the fixed frequency at which the input set operates. The sample skipping circuit includes a dump circuit selectively energized to dump selected samples produced by the input set. When the apparatus is formed of plural switching trees of different phases, a sampling clock generator having an adjustable delay circuit is used to delay sampling clock pulses by adjustable amounts so as to establish predetermined phases of sampling clock pulses of the same frequency and different phases for use in each switching tree.
摘要翻译：电流开关装置，包括由级联的开关电路组成的至少一个电流开关树，输入组可以以固定频率提供的采样时钟脉冲操作，其余的级联组可在不同频率下工作，并且还包括互连的样本跳跃电路在连续组之间，用于降低开关树的有效采样频率，同时保持输入组工作的固定频率。样本跳跃电路包括选择性地激励以转储由输入集产生的所选样本的转储电路。当设备由不同相位的多个开关树形成时，具有可调延迟电路的采样时钟发生器用于延迟可调量的采样时钟脉冲，以建立相同频率和不同相位的采样时钟脉冲的预定相位，用于在每个交换树中使用。

3. 发明授权

US5257025A High-speed sampling arrangement and apparatus using same 失效
标题翻译：使用相同的高速采样装置和设备
公开(公告)号：US5257025A
公开(公告)日：1993-10-26
申请号：US743695
申请日：1985-06-11
申请人： Walter O. LeCroy, Jr.
发明人： Walter O. LeCroy, Jr.
IPC分类号： H03K17/041 , H03K17/60 , H03M1/12 , H03M9/00
CPC分类号： H03K17/04113 , H03K17/603 , H03M1/1215
摘要： High-speed sampling apparatus includes a first source of sampling pulses exhibiting a first sampling frequency and a first sampling circuit coupled to receive an input signal and responsive to the sampling pulses to produce first signal samples. A second source of sampling pulses exhibiting a second sampling frequency is provided; and a second sampling circuit is coupled to the first sampling circuit to receive predetermined ones of the first signal samples and is responsive to the sampling pulses at the second sampling frequency to sample the predetermined first signal samples so as to produce therefrom second signal samples.
摘要翻译：高速采样装置包括呈现第一取样频率和耦合以接收输入信号并响应于该采样脉冲，以产生第一信号采样的第一采样电路的采样脉冲的第一源。提供了呈现第二采样频率的第二采样脉冲源; 并且第二采样电路耦合到第一采样电路以接收第一信号样本中的预定的采样电路，并且响应于第二采样频率处的采样脉冲对所述预定的第一信号样本进行采样，以便从其产生第二信号采样。

4. 发明授权

US4423373A Test probe 失效
标题翻译：测试探头
公开(公告)号：US4423373A
公开(公告)日：1983-12-27
申请号：US243993
申请日：1981-03-16
申请人： Walter O. LeCroy, Jr.
发明人： Walter O. LeCroy, Jr.
IPC分类号： G01R1/067 , G01R31/02
CPC分类号： G01R1/06788
摘要： A test probe having only two substantially rigid electrically conducting members which are insulated from each other, these members terminating in respective contact portions. When the probe is in use, these two contact portions simultaneously contact spaced apart areas of a current conducting segment then being tested. An insulated handle is formed by a protecting layer of insulation coupled to the two conducting members; and a pair of conducting leads pass through the handle and are electrically connected to the respective conducting members. In a preferred embodiment, the two conducting members are constituted by a cylindrical shaft which is longitudinally bisected into separate longitudinal portions that are bonded to each other by a layer of insulating adhesive. The cylindrical shaft terminates in a conical contact tip which also is longitudinally bisected, the two bisected portions of this tip constituting the contact portions of the probe.
摘要翻译：测试探针具有仅两个基本上刚性的导电构件，它们彼此绝缘，这些构件终止于相应的接触部分。当使用探头时，这两个接触部分同时接触导电段的间隔开的区域，然后被测试。绝缘手柄由耦合到两个导电构件的绝缘保护层形成; 并且一对导电引线穿过手柄并且电连接到相应的导电构件。在优选实施例中，两个导电构件由圆柱形轴构成，圆柱形轴纵向平分成分开的纵向部分，其彼此通过绝缘粘合剂层彼此粘合。圆柱形轴终止于也被纵向平分的锥形接触尖端，该尖端的两个二等分部分构成探针的接触部分。

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