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1.发明申请Method and system for analyzing single event upset in semiconductor devices 审中-公开用于分析半导体器件中的单事件不正常的方法和系统公开(公告)号：US20070096754A1
公开(公告)日：2007-05-03
申请号：US11265824
申请日：2005-11-03
申请人： Michael Johnson , Keith Golke , Pamela Vogt , David Nelson
发明人： Michael Johnson , Keith Golke , Pamela Vogt , David Nelson
IPC分类号： G01R31/302
CPC分类号： G01R31/3181 , G01R31/31816
摘要： A simulation model is used to predict a semiconductor device's response to a single event upset. The simulation model is connected to a model of the semiconductor device to be tested. The simulation model switches in an impedance path between a node to be tested in the semiconductor device model and an opposite voltage supply until a predefined amount of charge has been reached via sourcing (for a low to high voltage transition) or sinking (for a high to low voltage transition). When the predefined amount of charge has been reached, the impedance path is switched out. The switching of the impedance path approximates the charge movement that occurs from a heavy ion strike passing through a sensitive volume. By varying the predefined amount of charge, the semiconductor device's susceptibility to SEU can be predicted without having to resort to physical testing.
摘要翻译： 模拟模型用于预测半导体器件对单个事件不安的响应。 仿真模型连接到要测试的半导体器件的模型。 模拟模型切换半导体器件模型中要测试的节点之间的阻抗路径和相反的电源，直到通过源（达到低电压转换）或下沉（达到高电平）达到预定量的电荷 到低压转换）。 当达到预定量的电荷时，阻抗路径被切断。 阻抗路径的切换近似于通过敏感体积的重离子冲击发生的电荷运动。 通过改变预定量的电荷，可以预测半导体器件对SEU的敏感性，而无需诉诸于物理测试。
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公开(公告)号：US20070063758A1
公开(公告)日：2007-03-22
申请号：US11232734
申请日：2005-09-22
申请人： Thaddeus Allard , Keith Golke , Michael Johnson , Karu Vignarajah
发明人： Thaddeus Allard , Keith Golke , Michael Johnson , Karu Vignarajah
IPC分类号： H03L5/00
CPC分类号： H03K19/00315 , H03K17/102 , H03K17/6872
摘要： A voltage divider circuit can be realized by dividing a higher than rated operating voltage across a plurality of MOS transistors. The voltage divider circuit can be used for a wide variety of ratios of low and high operating voltages. Only one gate input voltage is needed, minimizing power dissipation, heat, and hot carrier effects. The voltage divider circuit is employed in a voltage driver circuit to generate a high output voltage in response to a low voltage input while minimizing damage to the MOS transistors within the voltage driver circuit.
摘要翻译： 可以通过在多个MOS晶体管之间划分高于额定工作电压来实现分压器电路。 分压器电路可用于各种各样的低和高工作电压比。 只需要一个栅极输入电压，最大限度地减少功耗，热量和热载流子效应。 分压器电路用于电压驱动器电路中，以响应于低电压输入而产生高输出电压，同时最小化电压驱动器电路内的MOS晶体管的损坏。
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公开(公告)号：US11299953B2
公开(公告)日：2022-04-12
申请号：US16399558
申请日：2019-04-30
申请人： Michael Johnson , Matthew Stone , Colin Andrew
发明人： Michael Johnson , Matthew Stone , Colin Andrew
摘要： An apparatus includes a housing configured to be disposed in a borehole in a resource bearing formation, the housing including an axially extending fluid conduit configured to receive borehole fluid, and a seating assembly including a convertible component that is configured to be actuated to move the convertible component in a radial direction between an open position and a seating position. The convertible component extends radially into the fluid conduit and forms a landing seat for an object when in the seating position, and the convertible component allows passage of the object therethrough when in the open position.
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公开(公告)号：US11168561B2
公开(公告)日：2021-11-09
申请号：US16216408
申请日：2018-12-11
申请人： Lei Fang , Michael Johnson , Herb Dhuet , Roger Steinsiek
发明人： Lei Fang , Michael Johnson , Herb Dhuet , Roger Steinsiek
IPC分类号： E21B47/09 , E21B47/16 , E21B47/095
摘要： An apparatus for determining a location of a downhole component includes at least one transmitter device and a receiver device. One of the at least one transmitter device and the receiver device is disposed at a first component of a borehole string configured to be deployed in a borehole and retained at a stationary position, and another of the at least one transmitter device and the receiver device is disposed at a moveable component configured to be moved while the first component is at the stationary position, the at least one transmitter device configured to emit a wireless signal and the receiver device configured to detect the wireless signal when the first component is at the stationary position. The apparatus also includes a processing device configured to receive signal data and estimate a location of the moveable component relative to the first component based on the signal data.
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公开(公告)号：US10975646B2
公开(公告)日：2021-04-13
申请号：US16046837
申请日：2018-07-26
申请人： YingQing Xu , Michael Johnson , Matthew Stone , Colin Andrew , Zhiyue Xu
发明人： YingQing Xu , Michael Johnson , Matthew Stone , Colin Andrew , Zhiyue Xu
摘要： An object removal enhancement arrangement including a seat, a volume movable with the seat, the volume being protected in a first condition of the seat and unprotected in a second condition of the seat, and a material disposed within or as a part of the volume, the material degradative of an object.
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公开(公告)号：US10794142B2
公开(公告)日：2020-10-06
申请号：US15969599
申请日：2018-05-02
申请人： Matthew Stone , Michael Johnson , Colin Andrew , Keith J. Murphy
发明人： Matthew Stone , Michael Johnson , Colin Andrew , Keith J. Murphy
摘要： A plug seat including a body having a lead in and a tooth, a flow feature disposed at the body, the feature providing fluid access directly to an area immediately adjacent the tooth. A plug seat including a tooth positioned relative to a body to be at an upstream most end of the body, a cage extending from the body immediately downstream of the tooth to an area radially outward of the tooth and upstream thereof.
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公开(公告)号：US20200032600A1
公开(公告)日：2020-01-30
申请号：US16047923
申请日：2018-07-27
申请人： YingQing Xu , Michael Johnson , Matthew Stone , Colin Andrew , Zhiyue Xu
发明人： YingQing Xu , Michael Johnson , Matthew Stone , Colin Andrew , Zhiyue Xu
摘要： An object seat including a seat host having a seal bore therein, a seat body dimensioned to be receivable in the seal bore, the seat body having an object receptor. A method for carrying out a pressure operation in a borehole including seating an object on an object receptor of a seat body, the seat body disposed in a seat host, the seat host disposed in the borehole, pressuring against the object, and moving the seat body along an interface between the seat body and the seat host to create a fluid flow pathway through the seat body and seat host interface. A borehole system including a borehole in a formation, an object seat as in any prior embodiment disposed in the borehole.
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公开(公告)号：US10513333B2
公开(公告)日：2019-12-24
申请号：US15603195
申请日：2017-05-23
申请人： Michael Johnson
发明人： Michael Johnson
摘要： A propulsion engine for an aircraft comprises an enclosure having a longitudinal axis oriented in a direction of travel of an aircraft, the enclosure including a series of walls and a plurality of ducts arranged along the longitudinal axis. Each of the ducts including a number of walls that are either dynamic or static in movement. Each of the ducts includes a central axis that is angled at, or can be adjusted to, an angle toward the front wall of the enclosure such that a top end of each duct is toward the front wall of the enclosure. A fan is disposed in each of the ducts configured to generate airflow along the respective central axes from the top end to the bottom end to provide lift and thrust to the aircraft.
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公开(公告)号：US20190211667A1
公开(公告)日：2019-07-11
申请号：US16216408
申请日：2018-12-11
申请人： Lei Fang , Michael Johnson , Herb Dhuet , Roger Steinsiek
发明人： Lei Fang , Michael Johnson , Herb Dhuet , Roger Steinsiek
CPC分类号： E21B47/091 , E21B47/16
摘要： An apparatus for determining a location of a downhole component includes at least one transmitter device and a receiver device. One of the at least one transmitter device and the receiver device is disposed at a first component of a borehole string configured to be deployed in a borehole and retained at a stationary position, and another of the at least one transmitter device and the receiver device is disposed at a moveable component configured to be moved while the first component is at the stationary position, the at least one transmitter device configured to emit a wireless signal and the receiver device configured to detect the wireless signal when the first component is at the stationary position. The apparatus also includes a processing device configured to receive signal data and estimate a location of the moveable component relative to the first component based on the signal data.
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公开(公告)号：US10335858B2
公开(公告)日：2019-07-02
申请号：US15178882
申请日：2016-06-10
申请人： Zhiyue Xu , Michael Johnson
发明人： Zhiyue Xu , Michael Johnson
IPC分类号： E21B33/12 , B22F7/04 , E21B23/00 , E21B29/00 , B22F7/06 , B05D7/14 , B22F7/02 , E21B17/00 , E21B34/06 , B22F5/00 , B33Y80/00 , E21B34/00
摘要： A method of making a composite downhole article is disclosed. The method include forming at least one removable core member comprising a first metallic material that is removable in a wellbore fluid at a first removal rate; and disposing at least one outer member on the core member, the outer member comprising a second material that is removable in the wellbore fluid at a second removal rate, wherein the removable core member has a composition gradient or a density gradient, or a combination thereof, and wherein the first removal rate is substantially greater than the second removal rate. A method of using a composite downhole article is also disclosed. The method includes forming a composite downhole article as described above; using the article to perform a first wellbore operation; exposing the article to the wellbore fluid; and selectively removing the second removable member.
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