Method and apparatus for small molecule detection by nanopipette

    公开(公告)号:US11852624B1

    公开(公告)日:2023-12-26

    申请号:US18103746

    申请日:2023-01-31

    CPC classification number: G01N33/48721 G01N27/44791 G01Q60/44

    Abstract: A system, apparatus, device and/or method for electrical label-free detection of single molecule via a glass or quartz nanopipette biosensor, one type of solid state nanopore biosensor based on resistive pulse measurements, are provided. The method of the subject invention effectively slows down the motion of biomolecules and concentrates them at the nanopipette tip. By driving biomolecules to come out of the nanopipette barrel and move in the fibrin hydrogel, unprecedented sensitivity using the typical size nanopipettes can be achieved. Small molecules such as doxorubicin, ATP, GTP, and short peptides can be easily detected with very high event rate, which greatly reduces the fabrication and measurement difficulties and open opportunities for various new applications for nanopipette biosensors.

    Controlled tunnel gap device for sequencing polymers
    42.
    发明授权
    Controlled tunnel gap device for sequencing polymers 有权
    用于测序聚合物的控制隧道间隙装置

    公开(公告)号:US09140682B2

    公开(公告)日:2015-09-22

    申请号:US13395956

    申请日:2011-01-31

    Abstract: The invention includes compositions, devices, and methods for analyzing a polymer and/or polymer unit. The polymer may be a homo or hetero-polymer such as DNA, RNA, a polysaccharide, or a peptide. The device includes electrodes that form a tunnel gap through which the polymer can pass. The electrodes are functionalized with a reagent attached thereto, and the reagent is capable of forming a transient bond to a polymer unit. When the transient bond forms between the reagent and the unit, a detectable signal is generated and used to analyze the polymer.

    Abstract translation: 本发明包括用于分析聚合物和/或聚合物单元的组合物,装置和方法。 聚合物可以是同质或异聚合物,例如DNA,RNA,多糖或肽。 该装置包括形成隧道间隙的电极,聚合物可通过该间隙通过。 电极用附着于其上的试剂进行功能化,并且试剂能够形成与聚合物单元的暂时结合。 当试剂和单元之间形成瞬态键时,产生可检测的信号并用于分析聚合物。

    Planar transformer and output inductor structure with single planar winding board and two magnetic cores
    45.
    发明授权
    Planar transformer and output inductor structure with single planar winding board and two magnetic cores 有权
    平面变压器和输出电感器结构,具有单平面绕组板和两个磁芯

    公开(公告)号:US06927661B2

    公开(公告)日:2005-08-09

    申请号:US10428963

    申请日:2003-05-02

    Abstract: The magnetic device consists of a planar winding board, which contains the windings for both the inductor and the transformer. Thus, this invention centers on integrating the windings of multiple magnetic devices, not integrating the cores. By connecting the transformer secondary winding directly to the output inductor winding without using any intermediate headers and/or termination pins or conductive copper traces, both electrical path and the termination resistance will be minimized. Furthermore, the number of headers or termination pins required will also be reduced, which helps to not only alleviate the issue associated with co-planarity of the termination pins, but also reduce the cost of the material and manufacturing.

    Abstract translation: 磁性装置由平面绕组板组成,其中包含用于电感器和变压器的绕组。 因此,本发明的重点是集成多个磁性装置的绕组,而不是集成磁芯。 通过将变压器次级绕组直接连接到输出电感器绕组,而不使用任何中间接头和/或端接引脚或导电铜迹线,电气路径和终端电阻将最小化。 此外,所需的头部或终端销的数量也将减少,这有助于不仅减轻与终端销的共面性相关的问题,而且还降低了材料和制造的成本。

    Detection circuit for circuit protection devices of a power supply and method of operation thereof
    47.
    发明授权
    Detection circuit for circuit protection devices of a power supply and method of operation thereof 有权
    电源电路保护装置的检测电路及其工作方法

    公开(公告)号:US06169649A

    公开(公告)日:2001-01-02

    申请号:US09354980

    申请日:1999-07-16

    CPC classification number: H02H3/046

    Abstract: For use with a power supply having first and second circuit protection devices, a detection circuit, a method of monitoring the protection devices and a power supply employing the circuit or the method. In one embodiment, the detection circuit includes (1) a bridge circuit coupled to the first and second circuit protection devices, (2) a resistor parallel-coupled across one of the first and second circuit protection devices and (3) a sensing circuit, coupled to the bridge circuit and the resistor, that senses an imbalance in the bridge circuit and develops therefrom a failure signal when at least one of the first and second circuit protection devices becomes inoperable.

    Abstract translation: 用于具有第一和第二电路保护装置的电源,检测电路,监控保护装置的方法和采用电路或方法的电源。 在一个实施例中,检测电路包括(1)耦合到第一和第二电路保护装置的桥式电路,(2)跨过第一和第二电路保护装置之一并联耦合的电阻器,以及(3)感测电路, 耦合到桥式电路和电阻器,其感测桥式电路中的不平衡,并且在第一和第二电路保护装置中的至少一个变得不可操作时从其产生故障信号。

    Fan operation detection circuit for a DC fan and method of operation
thereof
    48.
    发明授权
    Fan operation detection circuit for a DC fan and method of operation thereof 有权
    直流风扇的风扇运行检测电路及其运行方法

    公开(公告)号:US06163266A

    公开(公告)日:2000-12-19

    申请号:US207450

    申请日:1998-12-08

    CPC classification number: H02H7/093 F04D27/008 H02H3/04

    Abstract: For use with a DC fan, a detection circuit and a method of detecting an operational condition thereof. In one embodiment, the detection circuit includes: (1) a sensor, coupled to the DC fan, that senses a current through the sensorless DC fan and produces an intermediate signal based thereon and (2) an alarm circuit, coupled to the sensor, that compares the intermediate signal to a range defined by an upper limit signal and a lower limit signal and generates an alarm signal when the intermediate signal is outside of the range.

    Abstract translation: 用于DC风扇,检测电路和检测其操作条件的方法。 在一个实施例中,检测电路包括:(1)耦合到DC风扇的传感器,其感测通过无传感器的DC风扇的电流并基于其产生中间信号;以及(2)耦合到传感器的报警电路, 其将中间信号与由上限信号和下限信号限定的范围进行比较,并且当中间信号在该范围之外时产生报警信号。

    Switching device internal diode detection circuit and method of
operating the same
    49.
    发明授权
    Switching device internal diode detection circuit and method of operating the same 失效
    开关器件内部二极管检测电路及其操作方法

    公开(公告)号:US6020735A

    公开(公告)日:2000-02-01

    申请号:US65957

    申请日:1998-04-24

    CPC classification number: G01R1/206

    Abstract: An internal diode detection circuit for a device under test (DUT), a method of operating and a test fixture employing the same. In one embodiment, the internal diode detection circuit includes a source of electrical power that applies a reverse bias voltage to the DUT. The internal diode detection circuit also includes a current indicator, series-coupled to the DUT, that generates a signal when a current flows through the DUT. The signal indicates a presence of an internal diode in the DUT.

    Abstract translation: 一种用于待测器件(DUT)的内部二极管检测电路,一种操作方法和使用该二极管的测试夹具。 在一个实施例中,内部二极管检测电路包括向DUT施加反向偏置电压的电源。 内部二极管检测电路还包括串联耦合到DUT的电流指示器,当电流流过DUT时产生信号。 该信号表示DUT中存在内部二极管。

    Control architecture for interleaved converters
    50.
    发明授权
    Control architecture for interleaved converters 失效
    交错转换器的控制架构

    公开(公告)号:US5861734A

    公开(公告)日:1999-01-19

    申请号:US950335

    申请日:1997-10-14

    CPC classification number: H02M1/4216 H02M2003/1586 Y02B70/126 Y02P80/112

    Abstract: A control system for an converter circuit using two interleaved boost circuits is described which uses a single PWM controller to control the switches in both of the interleaved boost circuits. A voltage feedback control circuit monitors the output voltage of the converter circuit and sends that information to the PWM controller. A current sensing circuit is provided that senses the current in each of the boost converters. The current sensed in the current sensing circuit is converted to a voltage and used in conjunction with the voltage information from voltage feedback control circuit by the single PWM controller to regulate both of the boost converter switches. By regulating the boost converter switches, the single PWM controller is able to ensure proper synchronization and current sharing while tightly regulating the output voltage and improving the input power factor of the converter circuit.

    Abstract translation: 描述了使用两个交错升压电路的转换器电路的控制系统,其使用单个PWM控制器来控制两个交错升压电路中的开关。 电压反馈控制电路监视转换器电路的输出电压,并将该信息发送给PWM控制器。 提供了感测每个升压转换器中的电流的电流感测电路。 在电流感测电路中感测到的电流被转换成电压,并与来自电压反馈控制电路的电压信息结合使用,由单个PWM控制器调节两个升压转换器开关。 通过调节升压转换器开关,单个PWM控制器能够确保正确的同步和电流共享,同时严格调节输出电压并提高转换器电路的输入功率因数。

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