公开(公告)号：US08525556B2

公开(公告)日：2013-09-03

申请号：US13015981

申请日：2011-01-28

Applicant: Ramesh Kumar Singh ,  Yusuf Haque ,  Donald E. Lewis

Inventor： Ramesh Kumar Singh ,  Yusuf Haque ,  Donald E. Lewis

IPC: G11C27/02

CPC classification number: G11C27/02 ,  G11C7/1042 ,  G11C27/024

Abstract: A time-interleaved sample-and-hold system includes a first sample-and-hold circuit and a second sample-and-hold circuit. The first sample-and-hold circuit and the second sample-and-hold circuit share a common sampling switch. A method of remediating a timing offset between a first sample-and-hold circuit and a second sample-and-hold circuit in a time-interleaved sample-and-hold system includes switching at least one shunt capacitor disposed between two logic gates in a timing circuit to adjust a delay between a timing signal for a common sampling switch electrically coupled to the first and second sample-and-hold circuits and a timing signal for at least one of the sample-and-hold circuits.

Abstract translation: 时间交替采样和保持系统包括第一采样保持电路和第二采样保持电路。 第一采样保持电路和第二采样保持电路共用一个公共采样开关。 在时间交织的采样和保持系统中修复第一采样保持电路和第二采样保持电路之间的定时偏移的方法包括：切换至少一个分流电容器，该并联电容器设置在两个逻辑门之间 定时电路，用于调整电耦合到第一和第二采样保持电路的公共采样开关的定时信号与至少一个采样和保持电路的定时信号之间的延迟。

公开(公告)号：US20120194223A1

公开(公告)日：2012-08-02

申请号：US13015981

申请日：2011-01-28

Applicant: Ramesh Kumar Singh ,  Yusuf Haque ,  Donald E. Lewis

Inventor： Ramesh Kumar Singh ,  Yusuf Haque ,  Donald E. Lewis

IPC: G11C27/02

CPC classification number: G11C27/02 ,  G11C7/1042 ,  G11C27/024

Abstract: A time-interleaved sample-and-hold system includes a first sample-and-hold circuit and a second sample-and-hold circuit. The first sample-and-hold circuit and the second sample-and-hold circuit share a common sampling switch. A method of remediating a timing offset between a first sample-and-hold circuit and a second sample-and-hold circuit in a time-interleaved sample-and-hold system includes switching at least one shunt capacitor disposed between two logic gates in a timing circuit to adjust a delay between a timing signal for a common sampling switch electrically coupled to the first and second sample-and-hold circuits and a timing signal for at least one of the sample-and-hold circuits.

Abstract translation: 时间交替采样和保持系统包括第一采样保持电路和第二采样保持电路。 第一采样保持电路和第二采样保持电路共用一个公共采样开关。 在时间交织的采样和保持系统中修复第一采样保持电路和第二采样保持电路之间的定时偏移的方法包括：切换至少一个分流电容器，该并联电容器设置在两个逻辑门之间 定时电路，用于调整电耦合到第一和第二采样保持电路的公共采样开关的定时信号与至少一个采样和保持电路的定时信号之间的延迟。

公开(公告)号：US07688238B2

公开(公告)日：2010-03-30

申请号：US12055468

申请日：2008-03-26

Applicant: Donald E. Lewis ,  Rex K. Hales

Inventor： Donald E. Lewis ,  Rex K. Hales

IPC: H03M1/10

CPC classification number: H03M1/1038 ,  H03M1/1061 ,  H03M1/168

Abstract: A pipelined analog-to-digital converter includes a plurality of stages, each stage comprising an analog-to-digital converter (ADC) and a digital-to-analog converter (DAC). A method for increasing the accuracy of the pipelined ADC includes calibrating the ADC in each stage of the analog-to-digital converter by adjusting trip points of that ADC. Another method for increasing the accuracy of a pipelined ADC includes measuring error in an output of each the DAC; and correcting an output of the pipelined analog-to-digital converter for the measured error. These methods can be used together to further increase the accuracy of the pipelined ADC. Consequently, a pipelined analog-to-digital converter may include a look-up table containing data for correcting errors in output of each of the DACs, where trip points of the ADCs the ADCs in the stages of the pipelined converter have been calibrated to expected values.

Abstract translation: 流水线模数转换器包括多个级，每级包括模数转换器（ADC）和数模转换器（DAC）。 提高流水线ADC精度的一种方法包括通过调整该ADC的跳变点来校准模数转换器的每个级中的ADC。 提高流水线ADC精度的另一种方法包括测量每个DAC的输出误差; 以及校正所测量的误差的流水线模数转换器的输出。 这些方法可以一起使用，以进一步提高流水线ADC的精度。 因此，流水线模数转换器可以包括查找表，其包含用于校正每个DAC的输出中的误差的数据，其中流水线转换器级中的ADC的跳变点已被校准到期望值 价值观。

公开(公告)号：US20080238740A1

公开(公告)日：2008-10-02

申请号：US12055468

申请日：2008-03-26

Applicant: Donald E. Lewis ,  Rex K. Hales

Inventor： Donald E. Lewis ,  Rex K. Hales

IPC: H03M1/10

CPC classification number: H03M1/1038 ,  H03M1/1061 ,  H03M1/168

Abstract: A pipelined analog-to-digital converter includes a plurality of stages, each stage comprising an analog-to-digital converter (ADC) and a digital-to-analog converter (DAC). A method for increasing the accuracy of the pipelined ADC includes calibrating the ADC in each stage of the analog-to-digital converter by adjusting trip points of that ADC. Another method for increasing the accuracy of a pipelined ADC includes measuring error in an output of each the DAC; and correcting an output of the pipelined analog-to-digital converter for the measured error. These methods can be used together to further increase the accuracy of the pipelined ADC. Consequently, a pipelined analog-to-digital converter may include a look-up table containing data for correcting errors in output of each of the DACs, where trip points of the ADCs the ADCs in the stages of the pipelined converter have been calibrated to expected values.

Abstract translation: 流水线模数转换器包括多个级，每级包括模数转换器（ADC）和数模转换器（DAC）。 提高流水线ADC精度的一种方法包括通过调整该ADC的跳变点来校准模数转换器的每个级中的ADC。 提高流水线ADC精度的另一种方法包括测量每个DAC的输出误差; 以及校正所测量的误差的流水线模数转换器的输出。 这些方法可以一起使用，以进一步提高流水线ADC的精度。 因此，流水线模数转换器可以包括查找表，其包含用于校正每个DAC的输出中的误差的数据，其中流水线转换器级中的ADC的跳变点已被校准到期望值 价值观。

公开(公告)号：US5052215A

公开(公告)日：1991-10-01

申请号：US599890

申请日：1990-10-18

Applicant: Donald E. Lewis

Inventor： Donald E. Lewis

IPC: G01M3/24 ,  G01N29/14

CPC classification number: G01M3/24 ,  G01N29/14

Abstract: A system and method for injecting gas or fluid in the base beneath an above ground storage tank to enhance the rate of any leakage in the bottom of the tank, and detecting and locating the leak by acoustic sensors placed about the tank. The leak may then be sealed by injecting sealant through a probe placed beneath the tank in the area of the leak.

Abstract translation: 一种用于在基础储存罐下方的基座中注入气体或流体的系统和方法，以增加罐底部任何泄漏的速率，以及通过放置在罐周围的声学传感器来检测和定位泄漏。 然后可以通过在泄漏区域内通过放置在罐下方的探头注入密封剂来密封泄漏。

公开(公告)号：US4896528A

公开(公告)日：1990-01-30

申请号：US121662

申请日：1987-11-16

Applicant: Donald E. Lewis

Inventor： Donald E. Lewis

IPC: G01M3/02 ,  G01M3/22 ,  G01M3/32

CPC classification number: G01M3/32 ,  G01M3/02 ,  G01M3/226

Abstract: Method and apparatus are described for detecting the leakage of fluid under storage tanks. A number of parallel perforated test conduits are placed under the tank which is to be tested for leaks. A vacuum is placed on the test conduits to remove gas and liquid, if any, from the soil beneath the tank. If no gas or liquid is found it indicates that there is no leak. If gas or liquid is found, small test areas are isolated under the tank. The isolated areas may be placed under vacuum or pressure so gas and/or liquid can flow therethrough under pressure so that analysis of the flow in or flow out of the test conduit can be made to determine if that isolated area has leakage. The isolated areas can be changed until the isolated area with the leak is found.

Abstract translation: 描述了用于检测存储罐下的流体泄漏的方法和装置。 许多平行的穿孔测试管道放置在要测试泄漏的罐下面。 在测试管道上放置真空，以从罐底部的土壤中除去气体和液体（如果有的话）。 如果没有发现气体或液体，表示没有泄漏。 如果发现气体或液体，则在罐下方分离出小的测试区域。 隔离的区域可以被放置在真空或压力下，使得气体和/或液体可以在压力下流过其中，从而可以对进入或流出测试管道的流量进行分析，以确定该隔离区域是否具有渗漏。 隔离的区域可以改变，直到找到具有泄漏的隔离区域。

公开(公告)号：US07898452B2

公开(公告)日：2011-03-01

申请号：US12623815

申请日：2009-11-23

Applicant: Donald E. Lewis ,  Rex K. Hales

Inventor： Donald E. Lewis ,  Rex K. Hales

IPC: H03M1/38

CPC classification number: H03M1/1038 ,  H03M1/1061 ,  H03M1/168

Abstract: This method increases accuracy of a pipelined analog-to-digital converter comprising a plurality of stages, each stage comprising an analog-to-digital converter (ADC) and a digital-to-analog converter (DAC). The method includes calibrating each the ADC starting from a least significant stage until all ADCs have been calibrated using a reference digital-to-analog converter, the reference digital-to-analog converter selectively outputting values at desired trip points for each the ADC; measuring an output of each the DAC using downstream stages of the pipelined analog-to-digital converter to produce output measurements; and using the output measurements to calculate an error-corrected output of the pipelined analog-to-digital converter. The trip points are adjusted by modifying a reference current input to a comparator of each the ADC.

Abstract translation: 该方法提高了包括多个级的流水线模数转换器的精度，每级包括模数转换器（ADC）和数模转换器（DAC）。 该方法包括从最低有效级开始对每个ADC进行校准，直到使用参考数模转换器校准所有ADC，参考数模转换器选择性地在每个ADC的期望跳变点处输出值; 使用流水线模数转换器的下游级测量每个DAC的输出，以产生输出测量值; 并使用输出测量来计算流水线模数转换器的纠错输出。 通过修改每个ADC的比较器的参考电流输入来调整跳变点。

公开(公告)号：US20100066575A1

公开(公告)日：2010-03-18

申请号：US12623815

申请日：2009-11-23

Applicant: Donald E. Lewis ,  Rex K. Hales

Inventor： Donald E. Lewis ,  Rex K. Hales

IPC: H03M1/10 ,  H03M1/12

CPC classification number: H03M1/1038 ,  H03M1/1061 ,  H03M1/168

Abstract: This method increases accuracy of a pipelined analog-to-digital converter comprising a plurality of stages, each stage comprising an analog-to-digital converter (ADC) and a digital-to-analog converter (DAC). The method includes calibrating each the ADC starting from a least significant stage until all ADCs have been calibrated using a reference digital-to-analog converter, the reference digital-to-analog converter selectively outputting values at desired trip points for each the ADC; measuring an output of each the DAC using downstream stages of the pipelined analog-to-digital converter to produce output measurements; and using the output measurements to calculate an error-corrected output of the pipelined analog-to-digital converter. The trip points are adjusted by modifying a reference current input to a comparator of each the ADC.

Abstract translation: 该方法提高了包括多个级的流水线模数转换器的精度，每级包括模数转换器（ADC）和数模转换器（DAC）。 该方法包括从最低有效级开始对每个ADC进行校准，直到使用参考数模转换器校准所有ADC，参考数模转换器选择性地在每个ADC的期望跳变点处输出值; 使用流水线模数转换器的下游级测量每个DAC的输出，以产生输出测量值; 并使用输出测量来计算流水线模数转换器的纠错输出。 通过修改每个ADC的比较器的参考电流输入来调整跳变点。

公开(公告)号：US5139482A

公开(公告)日：1992-08-18

申请号：US735699

申请日：1991-07-25

Applicant: Paula S. Simeon ,  Donald E. Lewis

Inventor： Paula S. Simeon ,  Donald E. Lewis

IPC: A61M1/16 ,  A61M5/36 ,  A61M39/10

CPC classification number: A61M5/365 ,  A61M1/1692 ,  A61M2039/1005 ,  Y10S128/13

Abstract: An apparatus for signalling an accidental loss of blood from a patient's fluid infusion line includes a sensor assembly for connection to the line, the assembly having a housing for receiving a portion of the line within a side opening, a holder having a clamp member for drawing together portions of the housing on opposite sides of the side opening for fixing the portion of the line within the opening relative to the housing, a source of radiation directed through the opening for intersecting the line, and a radiation detector in the housing for receiving radiation that is transmitted from the source through the line. The apparatus further includes a battery powered circuit, the circuit intermittently powering the radiation source, and producing a reference voltage, a train of signal pulses forming a sensor signal that is indicative of the radiation received by the detector and, when the sensor signal is in a predetermined relationship with the reference signal, an alarm signal. The alarm signal is produced by an audio output transducer, a switch for powering the transducer being responsive to the signal pulses and enabled by a train of output enable pulses that are synchronized with the activation of the radiation source for producing a distinctive audio output.

Abstract translation: 用于发信号通知患者流体输注线中的血液意外丢失的装置包括用于连接到线路的传感器组件，该组件具有用于接收一侧面开口内的线的一部分的壳体，具有用于拉伸的夹具的保持器 所述壳体在所述侧开口的相对侧上的一部分，用于将所述线的所述部分相对于所述壳体固定在所述开口内，穿过所述开口的辐射源与所述线相交，以及所述壳体中的用于接收辐射的辐射探测器 这是从源头通过线路传输的。 该装置还包括电池供电的电路，电路间歇地为辐射源供电并产生参考电压，形成指示由检测器接收的辐射的传感器信号的信号脉冲串，并且当传感器信号处于 与参考信号的预定关系，报警信号。 报警信号由音频输出传感器产生，用于为传感器供电的开关响应于信号脉冲并通过一系列与激发辐射源同步的输出使能脉冲启用，以产生独特的音频输出。

公开(公告)号：US4023563A

公开(公告)日：1977-05-17

申请号：US615305

申请日：1975-09-22

Applicant: Charles A. Reynolds ,  Richard A. Mentelos ,  Donald E. Lewis

Inventor： Charles A. Reynolds ,  Richard A. Mentelos ,  Donald E. Lewis

IPC: A61B5/02 ,  A61B5/0285 ,  G01R29/02 ,  H03K5/153

CPC classification number: A61B5/0285 ,  H03K5/153

Abstract: Apparatus and a method for determining the onset of an interarterial blood pressure pulse and measuring the time delay preceding the onset from the corresponding electrical heartbeart triggering signal wherein the blood pressure pulse is converted to an electrical input signal which is split into two identical components, one being delayed in time, inverted and amplified after which it is added to the other. A timer measures the duration between the electrical heartbeat actuating signal and the point at which the sum of the blood pressure component signals reaches a peak and subtracts from that result the time delay applied to the one component to yield the electromechanical interval between the electrical heartbeat signal and onset of the blood pressure pulse.

Abstract translation: 用于确定动脉内血压脉冲开始并测量从相应的电心跳触发信号开始之前的时间延迟的装置和方法，其中血压脉冲被转换为被分成两个相同组件的电输入信号，一个 延迟时间，反转和放大，之后添加到另一个。 定时器测量电心跳启动信号与血压分量信号之和达到峰值的点之间的持续时间，并从该结果中减去施加到一个组件的时间延迟以产生电心跳信号之间的机电间隔 并开始血压脉冲。