公开(公告)号：US06618274B2

公开(公告)日：2003-09-09

申请号：US09973218

申请日：2001-10-09

Applicant: Jeffrey John Boylan ,  Qing Chen ,  Jin He ,  Del Ray Hilburn

Inventor： Jeffrey John Boylan ,  Qing Chen ,  Jin He ,  Del Ray Hilburn

IPC: H02M3335

CPC classification number: H02M3/33592 ,  Y02B70/1475

Abstract: A control scheme for a synchronous rectifier converter that avoids disabling the synchronous rectifiers entirely. Rather than disable the synchronous rectifier altogether to stop the flow of reverse current in light-load, startup, or shutdown conditions, the duty cycle of the synchronous rectifier is modified such that forward current is always allowed to flow through the synchronous rectifier, but the synchronous rectifier is turned off before the reverse current flow reaches a pre-determined level. This is accomplished by operating the converter in a partially synchronous mode of operation during light-load, startup, or shutdown conditions. Whether the circuit is in a light-load, startup, or shutdown condition is determined by a circuit characteristic of the converter that is sensed by the controller, such as average output current. The desired changeover point from fully-synchronous mode to the partially synchronous mode is set to a predetermined level of output current for the converter. The predetermined level is set based on the particular power system in which the invention is implemented. For example, this level can be based on the amount of reverse current that would disrupt the bus to which the converter output is connected, or it could be based on the heat created by the reverse current flow in the power converter when heat dissipation is a concern. The control scheme of the present invention effectively limits reverse current flow while also improving efficiency by eliminating the need for discrete diodes, yet retaining the benefits of synchronous rectification throughout the operating range of the converter.

Abstract translation: 一种同步整流变换器的控制方案，避免了完全禁用同步整流器。 而不是在轻载，启动或关闭条件下完全禁用同步整流器来停止反向电流的流动，同步整流器的占空比被修改为使得正向电流总是允许流过同步整流器，但是 在反向电流达到预定电平之前，同步整流器关闭。 这是通过在轻负载，启动或关闭条件下以部分同步工作模式操作转换器来实现的。 电路是否处于轻负载，启动或关闭状态，由控制器感测的转换器的电路特性（如平均输出电流）决定。 从全同步模式到部分同步模式的期望转换点被设置为转换器的预定输出电流水平。 基于实现本发明的特定电力系统来设定预定电平。 例如，该电平可以基于将中断转换器输出所连接的总线的反向电流的量，或者可以基于在功率转换器中的反向电流流产生的热量，当散热为 关心。 本发明的控制方案有效地限制了反向电流的流动，同时通过消除对分立二极管的需要而提高了效率，同时在转换器的整个工作范围内保持了同步整流的优点。

公开(公告)号：US06272022B1

公开(公告)日：2001-08-07

申请号：US09438986

申请日：1999-11-12

Applicant: Stephen A. Ferranti ,  Jin He ,  Gregory P. Jorgenson

Inventor： Stephen A. Ferranti ,  Jin He ,  Gregory P. Jorgenson

IPC: H05K900

CPC classification number: H05K7/20172 ,  H05K9/0041

Abstract: A housing for a power supply rectifier includes an enclosure having front and rear panels, top and bottom walls, and side walls. A bracket is attached to the enclosure and includes a plurality of projections for mating with a plurality of apertures contained in one or more of the walls of the enclosure. The projections are larger than the apertures, such that when pressure is applied to the bracket, the projections are forced into the apertures to form a seal to minimize EMI emissions from the enclosure. The bracket removably mounts a fan to the housing.

Abstract translation: 用于电源整流器的壳体包括具有前板和后板，顶壁和底壁以及侧壁的外壳。 支架附接到外壳并且包括多个突起，用于与容纳在外壳的一个或多个壁中的多个孔配合。 突起比孔大，使得当压力施加到支架时，突起被迫进入孔中以形成密封，以最小化来自外壳的EMI发射。 支架可拆卸地将风扇安装到外壳上。

公开(公告)号：US06255860B1

公开(公告)日：2001-07-03

申请号：US09116864

申请日：1998-07-16

Applicant: Frank H. Chavez ,  Jin He ,  Greg P. Jorgenson

Inventor： Frank H. Chavez ,  Jin He ,  Greg P. Jorgenson

IPC: H03K519

CPC classification number: H03K5/19

Abstract: A pulse detection circuit, a method of operation and a fan assembly test circuit employing the same. In one embodiment, the pulse detection circuit includes a charge pump that receives an input signal and varies a charge in a charge storage device based on the input signal. The pulse detection circuit further includes a level detector, coupled to the charge pump, that compares a voltage across the charge storage device with first and second reference voltages, and a signaling circuit, coupled to the level detector, that generates an output signal based on the comparison and indicating an existence of the pulse. The pulse detection circuit may be a part of a fan assembly test circuit adapted to receive an input signal from a cooling fan under test.

Abstract translation: 脉冲检测电路，操作方法和采用该脉冲检测电路的风扇组装测试电路。 在一个实施例中，脉冲检测电路包括电荷泵，其接收输入信号并且基于输入信号改变电荷存储装置中的电荷。 脉冲检测电路还包括耦合到电荷泵的电平检测器，其将电荷存储装置两端的电压与第一和第二参考电压进行比较，以及耦合到电平检测器的信号电路，其产生基于 比较并指示脉搏的存在。 脉冲检测电路可以是适于从被测试的冷却风扇接收输入信号的风扇组件测试电路的一部分。

公开(公告)号：US06201719B1

公开(公告)日：2001-03-13

申请号：US09469693

申请日：1999-12-22

Applicant: Jin He ,  Mark E. Jacobs

Inventor： Jin He ,  Mark E. Jacobs

IPC: H02M700

CPC classification number: H02M7/5387 ,  H02M2007/53878

Abstract: A controller for a full bridge power converter having controllable switches, a method of operating the controller and a power supply employing the controller or the method. In one embodiment, the controller includes (1) a signal generator circuit designed to drive the controllable switches in a phase-shifted mode and (2) a switching network, coupled to the signal generator circuit, adapted to enable the signal generator circuit to operate the converter in an alternative one of (2a) the phase-shifted mode, wherein the controllable switches in each of first and second legs of the converter are complementarily switched, the signal generator circuit capable of adjusting a relative phase between the first and second legs and (2b) a normal mode, wherein diagonal pairs of the controllable switches are switched substantially simultaneously and at a substantially full duty cycle.

Abstract translation: 一种具有可控开关的全桥功率转换器的控制器，一种操作该控制器的方法和一种采用该控制器或该方法的电源。 在一个实施例中，控制器包括（1）设计成以相移模式驱动可控开关的信号发生器电路，以及耦合到信号发生器电路的适合于使信号发生器电路工作的开关网络 （2a）所述相移模式的替代方案中的转换器，其中所述转换器的第一和第二支路中的每一个中的可控开关被互补地切换，所述信号发生器电路能够调节所述第一和第二支路之间的相对相位 和（2b）正常模式，其中可控开关的对角线基本上同时地以大致全占空比被切换。

公开(公告)号：US6094087A

公开(公告)日：2000-07-25

申请号：US335319

申请日：1999-06-17

Applicant: Jin He ,  Mark E. Jacobs ,  Kamakshi Sridhar

Inventor： Jin He ,  Mark E. Jacobs ,  Kamakshi Sridhar

IPC: H02M1/00 ,  H02M1/42 ,  H02M3/337 ,  H03K17/04 ,  H03K17/0412 ,  H03K17/687

CPC classification number: H02M1/4225 ,  H02M3/337 ,  H03K17/0406 ,  H03K17/04123 ,  Y02B70/126

Abstract: A gate drive circuit for an isolated gate device, a method of driving the same and a switch-mode power supply employing the circuit or the method. In one embodiment, the circuit includes: (1) a capacitor, having a first terminal coupled to a source of drive voltage and a second terminal coupled to a gate of the isolated gate device, that stores a charge therein when the drive voltage maintains the isolated gate device in an "on" state and (2) a conductive path, leading from the first terminal to an output terminal of the isolated gate device and enabled when the isolated gate device is to be transitioned from the "on" state to an "off" state, that provides a negative off-bias voltage to the gate thereby to avoid spurious turn-on of the isolated gate device.

Abstract translation: 用于隔离栅极器件的栅极驱动电路，其驱动方法和采用该电路或方法的开关模式电源。 在一个实施例中，电路包括：（1）电容器，其具有耦合到驱动电压源的第一端子和耦合到隔离栅极器件的栅极的第二端子，当驱动电压保持时，存储电荷 隔离栅极器件处于“导通”状态，以及（2）从隔离栅极器件的第一端子到输出端子的导电通路，并且当隔离栅极器件将从“接通”状态转换到 “关闭”状态，其向栅极提供负偏置电压，从而避免隔离栅极器件的杂散接通。

公开(公告)号：US5943200A

公开(公告)日：1999-08-24

申请号：US3527

申请日：1998-01-06

Applicant: Jin He

Inventor： Jin He

IPC: H02M3/155 ,  H02H9/00

CPC classification number: H02M3/155

Abstract: For use in a boost converter having a main boost switch, a boost inductor, a boost diode coupled to the boost inductor and the main boost switch and a resonant, passive snubber coupled to the boost inductor and the main boost switch that limits reverse recovery currents in the boost diode during a turn-on of the main boost switch, a peak voltage clamping circuit for, and method of, reducing voltage stress on the main boost switch caused by operation of the snubber. In one embodiment, the circuit includes a blocking switch and a zener diode, coupled in series between the main boost switch and the boost diode, that cooperate to provide a conductive path from the main boost switch to an output of the boost converter for electrical currents that exceed a predetermined peak voltage value thereby to reduce the voltage stress on the main boost switch.

Abstract translation: 用于具有主升压开关的升压转换器，升压电感器，耦合到升压电感器和主升压开关的升压二极管以及耦合到升压电感器和主升压开关的谐振无源缓冲器，其限制反向恢复电流 在主升压开关导通期间的升压二极管中，使用由缓冲器的操作引起的主升压开关上的电压应力的峰值电压钳位电路及其方法。 在一个实施例中，电路包括串联耦合在主升压开关和升压二极管之间的阻塞开关和齐纳二极管，其协作以提供从主升压开关到升压转换器的输出的电流 超过预定的峰值电压值，从而降低主升压开关上的电压应力。

公开(公告)号：US11852624B1

公开(公告)日：2023-12-26

申请号：US18103746

申请日：2023-01-31

Applicant: Jin He ,  Santosh Khatri ,  Popular Pandey

Inventor： Jin He ,  Santosh Khatri ,  Popular Pandey

IPC: G01N27/327 ,  G01N33/487 ,  G01N27/447 ,  G01Q60/44

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.

公开(公告)号：US09140682B2

公开(公告)日：2015-09-22

申请号：US13395956

申请日：2011-01-31

Applicant: Stuart Lindsay ,  Shuai Chang ,  Jin He ,  Peiming Zhang ,  Shuo Huang

Inventor： Stuart Lindsay ,  Shuai Chang ,  Jin He ,  Peiming Zhang ,  Shuo Huang

IPC: G01N27/00 ,  G01N33/487

CPC classification number: G01N33/48721 ,  C12Q1/6869 ,  G01N27/3275 ,  Y10T436/143333

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。

公开(公告)号：US20130336128A1

公开(公告)日：2013-12-19

申请号：US13517838

申请日：2012-06-14

Applicant: Venson M. Shaw ,  Jin He

Inventor： Venson M. Shaw ,  Jin He

IPC: H04L12/26

CPC classification number: H04L41/5038 ,  H04L43/103 ,  H04L43/12 ,  H04L47/12 ,  H04L47/323 ,  H04W24/00 ,  H04W24/02

Abstract: An operation, administration, and maintenance data sink may receive an event data packet. The event data packet may be processed and transmitted based on instructions from a controller, wherein the controller may regulate the transmission of the processed event data packet based on network conditions.

Abstract translation: 操作，管理和维护数据宿可以接收事件数据分组。 可以基于来自控制器的指令来处理和发送事件数据分组，其中控制器可以基于网络条件来调节处理的事件数据分组的传输。

公开(公告)号：US20080034012A1

公开(公告)日：2008-02-07

申请号：US11498594

申请日：2006-08-02

Applicant: Lev Novik ,  Douglas B. Terry ,  Irena Hudis ,  Jeremie E. Sartor ,  Shaoyu Zhou ,  Tomas Talius ,  Yunxin Wu ,  Jin He ,  Mark Scurrell

Inventor： Lev Novik ,  Douglas B. Terry ,  Irena Hudis ,  Jeremie E. Sartor ,  Shaoyu Zhou ,  Tomas Talius ,  Yunxin Wu ,  Jin He ,  Mark Scurrell

IPC: G06F17/30

CPC classification number: G06F17/30176 ,  Y10S707/99934 ,  Y10S707/99938 ,  Y10S707/99952 ,  Y10S707/99953 ,  Y10S707/99955

Abstract: Extending hierarchical synchronization (sync) scopes to non-hierarchical scenarios may involve a method for synchronizing differently organized data stores comprising mapping different physical organizations to similar logical organizations and utilizing an organization-based synchronization algorithm to synchronize the differently organized stores. Also, the uniqueness constraints of the organizations may be preserved as well as the parent-child ordering constraints of the organizations.

Abstract translation: 将分级同步（同步）范围扩展到非分层场景可能涉及用于同步不同组织的数据存储的方法，包括将不同的物理组织映射到类似的逻辑组织，并利用基于组织的同步算法来同步不同组织的存储。 此外，组织的唯一性限制也可能受到组织的父母子女排序限制的限制。