公开(公告)号：US20020034295A1

公开(公告)日：2002-03-21

申请号：US09924990

申请日：2001-08-08

申请人： U.S. Philips Corp.

发明人： Huibert Den Boer

IPC分类号： H04L009/06

CPC分类号： H04L9/002 ,  H04L9/0625 ,  H04L2209/24

摘要： The method and apparatus are used for cryptographically converting a digital input block into a digital output block. The apparatus 400 comprises first input means 410 for obtaining the digital input block and second input means 440 for obtaining a key K1. Cryptographic processing means 420 of the apparatus 400 convert the digital input block into the digital output block by merging a selected part M1 of the digital input block with the key K1 and producing a data block B1 which non-linearly depends on M1 and K1. The merging is performed in one, sequentially inseparable step. Output means 430 are used to output the digital output block of which a selected part is derived from B1.

摘要翻译： 该方法和装置用于将数字输入块加密转换为数字输出块。 装置400包括用于获得数字输入块的第一输入装置410和用于获得密钥K1的第二输入装置440。 装置400的加密处理装置420通过将数字输入块的选定部分M1与密钥K1合并并产生非线性地依赖于M1和K1的数据块B1，将数字输入块转换为数字输出块。 合并在一个顺序不可分割的步骤中执行。 输出装置430用于输出从B1导出所选择的部分的数字输出块。

公开(公告)号：US5266820A

公开(公告)日：1993-11-30

申请号：US769919

申请日：1991-09-30

申请人： Cornelis Van Berkel

发明人： Cornelis Van Berkel

IPC分类号： H01L21/8234 ,  H01L27/06 ,  H01L27/12 ,  H01L29/78 ,  H01L29/786 ,  H01L29/68 ,  H01L29/92

CPC分类号： H01L27/12

摘要： A distributed threshold voltage TFT has a first FET and a second FET connected in series with the first point between the first and the second FET via a series circuit of a first capacitance and a second capacitance. The gate of the second FET is connected to the junction point between the first and the second capacitance and to the gate of the first FET via a non-linear resistance with a low R.sub.on and a high R.sup.off. Leakage currents can be kept very low in this DTV FET without an extra external voltage and/or without extra doping.

公开(公告)号：US5265144A

公开(公告)日：1993-11-23

申请号：US821511

申请日：1992-01-15

申请人： Geoffrey Harding ,  Gerhard Martens

发明人： Geoffrey Harding ,  Gerhard Martens

IPC分类号： A61B6/00 ,  A61B6/02 ,  A61B6/03 ,  A61B6/06 ,  G01N23/201 ,  G21K1/02 ,  G01T1/36

CPC分类号： A61B6/483 ,  A61B6/032 ,  A61B6/4241 ,  G01N23/201 ,  G21K1/025

摘要： An X-ray apparatus comprises a polychromatic X-ray source for generating a primary beam of small cross-section, an energy-sensitive detector arrangement for detecting the scattered radiation produced by elastic scattering processes in the primary beam, which detector arrangement comprises a plurality of detector elements which are arranged on rings concentric with the primary beam, and a collimator arrangement which is arranged between the X-ray source and the detector arrangement and which encloses the primary beam. In order to enable accurate determination of the pulse transfer spectrum while using a low dose, the collimator arrangement is constructed so that the scattered radiation from the same section of the primary beam is incident on a plurality of detector elements.

摘要翻译： X射线装置包括用于产生小截面的主光束的多色X射线源，用于检测由主光束中的弹性散射处理产生的散射辐射的能量敏感检测器装置，该检测器装置包括多个 被布置在与主光束同心的环上的检测器元件以及布置在X射线源和检测器装置之间并且包围主光束的准直器装置。 为了在使用低剂量时能够准确地确定脉冲传输光谱，准直器装置被构造成使得来自主光束的相同部分的散射辐射入射到多个检测器元件上。

公开(公告)号：US5258624A

公开(公告)日：1993-11-02

申请号：US899818

申请日：1992-06-16

申请人： Stephen J. Battersby ,  John M. Shannon ,  Marek Szubert

发明人： Stephen J. Battersby ,  John M. Shannon ,  Marek Szubert

IPC分类号： H01L47/02 ,  H01L27/26 ,  H01L47/00

CPC分类号： H01L47/026 ,  Y10S257/905

摘要： A transferred electron effect device has a semiconductor body with an active region (2) of n conductivity type formed of a semiconductor material having a relatively low mass, high mobility conduction band main minimum and at least one relatively high mass, low mobility conduction band satellite minimum, and an injection zone (3) adjoining the active region (2) for causing electrons to be emitted, under the influence of an applied electric field, from the injection zone (3) into the active region (2) with an energy comparable to that of the relatively high mass, low mobility, conduction band satellite minima of the active region. The injection zone (3) is formed by first and second n conductivity type regions (4 and 5) separated by a barrier region (6) which has an impurity concentration characteristic of the p conductivity type and which is sufficiently thin as to be fully depleted of free charge carriers under zero bias, at least one of the first and second regions (4) being highly doped relative to the active region at least adjacent the barrier region and the barrier region (6) having an impurity concentration sufficient to provide a potential barrier (P) to the flow of electrons of a height such that in operation of the device, electrons with sufficient energy to surmount the potential barrier (P) provided by the barrier region (6) are emitted into the active region (2) with an energy comparable to that of a conduction band satellite minimum of the active region (2).

摘要翻译： 转移的电子效应器件具有半导体本体，其具有由导电类型的有源区域（2）形成的半导体材料，该半导体材料具有质量较小的高迁移率导带主要最小值和至少一个相对高质量的低迁移率导带卫星 最小值和邻近有源区域（2）的注入区域（3），用于使电子在施加的电场的影响下从注入区域（3）以能量相当的方式从注入区域（3）发射到有源区域（2） 到有源区域的较高质量，低迁移率，导带卫星最小值。 注入区（3）由第一和第二n导电类型区域（4和5）形成，该区域由具有p导电类型的杂质浓度特性并且足够薄以便完全耗尽的势垒区域（6）分开 在零偏压下的自由电荷载体，至少一个第一和第二区域（4）相对于至少邻近阻挡区域的有源区域是高度掺杂的，而阻挡区域（6）具有足以提供电位的杂质浓度 阻挡层（P）对于高度的电子流，使得在器件的操作中，具有足够能量以超过由势垒区域（6）提供的势垒（P）的电子的电子被发射到有源区域2中， 能量与有源区域（2）的导带卫星最小值的能量相当。

公开(公告)号：US5257127A

公开(公告)日：1993-10-26

申请号：US837518

申请日：1992-02-18

申请人： Rifat A. M. Hikmet

发明人： Rifat A. M. Hikmet

IPC分类号： G02F1/1333 ,  C09K19/38 ,  G02F1/35 ,  G02F1/361 ,  G02F1/37 ,  H03F7/00

CPC分类号： C09K19/38 ,  G02F1/3615 ,  G02F1/37 ,  G02F2001/3542

摘要： In a device for doubling the frequency of a light wave, a fundamental light wave 2 originating from a laser light source 1 is guided through a nonlinear optical medium 5 while forming a second harmonic wave 6. The nonlinear optical medium is formed from a polymer network and elements having a great hyperpolarizability. In the device, phase matching is realised by the application of a polymer network having a helical structure. The pitch of the helical structure is adapted to the phase-matching conditions by the selection of the polymerization conditions during the formation of the network.

公开(公告)号：US5250815A

公开(公告)日：1993-10-05

申请号：US717225

申请日：1991-06-18

申请人： Stephen J. Battersby ,  Stewart B. Jones

发明人： Stephen J. Battersby ,  Stewart B. Jones

IPC分类号： H01L47/00 ,  H01L47/02 ,  H01L23/34

CPC分类号： H01L47/005 ,  H01L47/026

摘要： A transferred electron effect device (1) has adjacent its cathode contact region (3) an injection zone (60) defining a potential barrier (P) for causing electrons to be emitted, under the influence of an electric field applied between the cathode and anode contact regions (3 and 4), into the active region (5) of the device with an energy comparable to that of a relatively high mass, low mobility satellite minimum (L) of the active region (5). The anode contact region (4), active region (5), injection zone (60) and cathode contact region (3) are grown sequentially, for example using molecular beam epitaxy, on a substrate which is then selectively removed to expose the anode contact region. A heat sink (70) is provided in thermal contact with the anode contact region (4). Providing the heat sink (70) in thermal contact with the anode contact region (4) rather than the cathode contact region (3) enables a significant increase in rf output power.

公开(公告)号：US5245306A

公开(公告)日：1993-09-14

申请号：US957537

申请日：1992-10-05

申请人： Johannes A. Overweg

发明人： Johannes A. Overweg

IPC分类号： A61B5/055 ,  G01R33/38 ,  G01R33/381 ,  G01R33/3875 ,  G01R33/421

CPC分类号： G01R33/3875 ,  G01R33/421

摘要： A magnet system for generating a uniform magnetic field in an examination zone (5) in an accommodation space of magnetic resonance apparatus is formed by a first, approximately cylindrical electromagnetic coil system (1) which encloses the examination zone and which is symmetrically arranged relative to a symmetry axis (9) and relative to a asymmetry plane (11) extending perpendicularly to the symmetry axis, and a second, approximately cylindrical electromagnetic coil system (7) which is arranged so as to be symmetrical relative to the symmetry axis and relative to the symmetry plane and which is arranged so as to be concentric with the first coil system, the magnetic dipole moments of the first and the second coil system being oppositely directed and substantially equal. The first coil system (1) includes a central coil (13) which is symmetrically arranged relative to the symmetry plane (11) and two pairs of further coils (15, 17) which are symmetrically arranged relative to the symmetry plane, the second coil system (7) including a central coil (21) symmetrically arranged relative to the symmetry plane and a pair of further coils (23) symmetrically arranged relative to the symmetry plane. As a result, despite the use of only eight coils the magnet system generates a highly uniform central magnetic field and only a very small stray field.

公开(公告)号：US5243285A

公开(公告)日：1993-09-07

申请号：US744628

申请日：1991-08-13

申请人： Graeme McKinnon ,  Peter Bosiger

发明人： Graeme McKinnon ,  Peter Bosiger

IPC分类号： A61B5/055 ,  G01R33/46 ,  G01R33/48 ,  G01R33/483

CPC分类号： G01R33/4633 ,  G01R33/4833

摘要： Two-dimensional nuclear magnetic resonance spectroscopy with a frequently repeated sequence comprises four high-frequency pulses and acting together with a homogeneous stationary magnetic field upon an examination area, which sequence contains two 180.degree. pulses, halfway between which a third pulse is located. The pulse of the sequence are preceded by a first pulse, whose distance from the second pulse, which is equal to or larger than the relative distance of the other pulses, is varied during the repetition of the sequence. This method is particularly suitable for in vivo examinations of the human body in that during three of the four pulses magnetic gradient fields are operative, whose gradients extend mutually perpendicular to each other, and before and after the third high-frequency pulse a magnetic gradient field is operative having such a duration and such a gradient that the time integral across this field has the same value before the third pulse as after the third pulse.

摘要翻译： 具有频繁重复序列的二维核磁共振光谱包括四个高频脉冲，并且在检查区域上与均匀的固定磁场一起作用，该序列包含两个180度脉冲，其中位于第三脉冲之间的中间。 序列的脉冲之前是第一脉冲，其中与第二脉冲的距离等于或大于其它脉冲的相对距离，在重复序列期间是变化的。 该方法特别适用于人体的体内检查，因为在四个脉冲中的三个脉冲期间，磁梯度场可操作，其梯度彼此相互垂直延伸，并且在第三高频脉冲之前和之后磁梯度场 具有这样的持续时间和这样的梯度，使得该场的时间积分在第三脉冲之前与第三脉冲之后具有相同的值。

公开(公告)号：US5239608A

公开(公告)日：1993-08-24

申请号：US446496

申请日：1989-12-04

申请人： Heinrich Hemme

发明人： Heinrich Hemme

IPC分类号： G02B6/122 ,  G02B6/12 ,  G02F1/095 ,  H01S3/06 ,  H01S3/101

CPC分类号： G02F1/095

摘要： Magneto-optical waveguide having a magneto-optical layer (5) applied on a substrate layer (4). An accurate phase match is provided at a compact structure in that a thin layer is applied in uniform thickness on the overall surface area of the magneto-optical layer (5), which thin layer consists of an optically transparent non-metallic material and whose refractive index is less than the refractive indices of the magneto-optical layer (5) and of the substrate layer (4), and whose thickness is less than 0.3 .mu.m.

摘要翻译： 具有施加在基板层（4）上的磁光层（5）的磁光波导。 在紧凑的结构中提供精确的相位匹配，其中薄层以均匀的厚度施加在磁光层（5）的整个表面区域上，薄层由光学透明的非金属材料构成，其折射率 指数小于磁光层（5）和基底层（4）的折射率，其厚度小于0.3μm。

公开(公告)号：US5233577A

公开(公告)日：1993-08-03

申请号：US830784

申请日：1992-02-03

申请人： Johannes L. Bakx ,  Petrus C. J. Hoeven

发明人： Johannes L. Bakx ,  Petrus C. J. Hoeven

IPC分类号： G11B11/105 ,  H03K17/66 ,  H03K17/687

CPC分类号： G11B11/10508 ,  H03K17/66 ,  H03K17/6872

摘要： A magneto-optical recording apparatus provided with a magnetic field modulator (8). The magnetic-field modulator (8) has a field coil (18) for generating a magnetic field and switches (11,12,15,16,22) for coupling at least one terminal (17) of the magnet coil (18) to a first potential point (10) at a first potential (Vp) or a second potential point (14) at a second potential (Vn) depending on the logic value of a control signal (vs), in order to produce in the field coil an alternating current whose polarity depends on the logic value. The field coil (18) is arranged in a parallel resonant circuit (18,21). The switches have means (12,16) for inhibiting, after the terminal (17) has been uncoupled from one of the potential points (10,14), current supply from the other potential point for a time interval corresponding to half the resonant period of the resonant circuit (18,21). This magnetic-field modulator provides a very rapid reversal of the current through the field coil.

摘要翻译： 一种具有磁场调制器（8）的磁光记录装置。 磁场调制器（8）具有用于产生磁场的励磁线圈（18）和用于将所述磁体线圈（18）的至少一个端子（17）耦合的开关（11,12,15,16,22）到 取决于控制信号（vs）的逻辑值的第一电位（Vp）或第二电势（14）处于第二电位（Vn）的第一电势点（10），以便在励磁线圈 极性取决于逻辑值的交流电。 励磁线圈（18）布置在并联谐振电路（18,21）中。 开关具有用于在终端（17）已经从一个潜在点（10,14）脱离连接之后禁止从另一个电位点的电流供应一段对应于谐振周期的一半的时间间隔的装置（12,16） 的谐振电路（18,21）。 该磁场调制器提供了通过励磁线圈的电流的非常快速的反转。