公开(公告)号：WO1987002530A2

公开(公告)日：1987-04-23

申请号：PCT/US1986001882

申请日：1986-09-15

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  NEWCOMB, Russell, R. ,  BLACK, William, C.

IPC: H03M01/38

CPC classification number: H03M1/144 ,  H03M1/46 ,  H03M1/687 ,  H03M1/804 ,  H03M1/806

Abstract: An M-bit all-capacitive analog-to-digital (A/D) converter (10) which includes 2N switched capacitors (CP01-CP16 and CN01-CN16) of substantially identical capacitance for use in determining the N most significant bits. Each of the capacitors have one terminal connected to a common node (19) and its other terminal switchable to either ground or a positive reference voltage (VR). At the beginning of a conversion cycle, the common node (19) is at a potential indicative of a sampled analog input voltage (Va), a first group of 2N-1 capacitors (20) are switched to ground, and a second group of 2N-1 capacitors (30) are switched to the positive reference voltage (VR). For a given conversion cycle, selected capacitors of one of the capacitor groups are sequentially switched to drive the common node (19) voltage to ground. A method is also disclosed for converting analog signals to digital signals utilizing parallel capacitive elements of substantially identical capacitance.

Abstract translation: 完全电容的M位A / D转换器（10）包括用于确定N个最高有效位的具有基本相同电容的2N个开关电容器（CP01-CP16和CN01-CN16）。 每个电容器具有连接到公共节点（19）的端子和连接到地或正参考电压（VR）的另一个可切换端子。 在转换周期开始时，公共节点（19）处于指示采样模拟输入电压（Va）的电位，第一组2N-1电容器（20）切换到地，并且a 第二组2N-1电容器（30）被切换到正参考电压（VR）。 对于给定的转换周期，依次切换电容器组中的一个电容器组的选定电容器以将公共节点电压（19）接地。 还描述了使用基本上相同电容的并联电容元件将模拟信号转换为数字信号的方法。

公开(公告)号：WO1987002520A1

公开(公告)日：1987-04-23

申请号：PCT/US1986002026

申请日：1986-09-29

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  MARCINIAK, Hans, C. ,  GOODWIN, Frank, E.

IPC: H01S03/082

CPC classification number: H01S3/0315 ,  H01S3/0823 ,  H01S3/1055

Abstract: A high pressure CO2 waveguide laser having an extended tuning range. The laser cavity is bounded by a first partially reflecting member (22) and a second partially reflecting member (15), the second member comprising a reflecting mirror (14) and a diffraction grating (28) member used in the Littrow configuration, the grating being positioned outside the laser cavity (12) and spaced from the second reflecting mirror a predetermined distance (h). The combination of the mirror (14) and grating (28) provides an effective grating reflectivity which is sufficient to extend the tuning range of the laser to a value not previously available.

公开(公告)号：WO1987002206A1

公开(公告)日：1987-04-09

申请号：PCT/US1986001824

申请日：1986-09-08

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  O'CONNOR, Roger, J. ,  LANE, Keith, A.

IPC: H04K03/00

CPC classification number: H04B1/7156

Abstract: One device (20) (the "NTU") is deemed to be keeping the network time, to which the other devices (25, 30, 35) must synchronize in order to communicate over the network. In a broadcast mode of the method an unsynchronized unit (25, 30, 35) (a "RTU") operates in an idle state to receive on a discrete set of receive frequencies. The time kept by the RTU is assumed to within a predetermined number of time interval of the present network time interval. In a broadcast mode the NTU transmits sequences of synchronization messages, each sequence including a message transmitted at a receive frequency for each of the past, present and future time intervals necessary to cover the time uncertainty time. This sequence is transmitted at a transmit hop rate substantially higher than the RTU receive hop rate, so that all possible receive frequencies and synchronization codes are bracketed by the transmission sequence. Each message includes information enabling the RTU to predict the time and frequency at which network time information will be transmitted by the NTU. The RTU receives one of the messages and tunes to the appropriate receive frequency to receive information enabling it to synchronize to the network time.

Abstract translation: 一个设备（20）（“NTU”）被认为保持其他设备（25,30,35）必须同步的网络时间，以便通过网络进行通信。 在该方法的广播模式中，非同步单元（25,30,35）（“RTU”）在空闲状态下操作以在一组离散的接收频率上接收。 假设由RTU保留的时间在当前网络时间间隔的预定数量的时间间隔内。 在广播模式中，NTU发送同步消息序列，每个序列包括以覆盖时间不确定时间所需的每个过去，现在和未来时间间隔的接收频率发送的消息。 该序列以明显高于RTU接收跳频率的发送跳跃速率发送，使得所有可能的接收频率和同步码由传输序列括起来。 每个消息包括使RTU预测由NTU发送网络时间信息的时间和频率的信息。 RTU接收一个消息并调谐到适当的接收频率，以接收信息，使其能够与网络时间同步。

公开(公告)号：WO1987001896A1

公开(公告)日：1987-03-26

申请号：PCT/US1986001791

申请日：1986-09-02

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  LEDEBUHR, Arno, G.

IPC: H04N09/31

CPC classification number: G02B27/1033 ,  G02B27/145 ,  H04N9/3108

Abstract: A prism assembly (30) for a single light valve, full-color projector. The prism assembly is adapted to polarize and separate the white illumination light into the three primary colors. Three separate input images corresponding to the information for the red, green and blue components of the full image are applied to separate regions (12, 13, 14) of the light valve photoresponsive layer. The prism assembly comprises three channels (8d, 8f, 8g), one for each of the primary colors. Each channel polarizes the illumination light into P-polarized colored light which is reflected onto the region of the light valve (20) corresponding to the respective input image. The illumination light in each channel is reflected by the respective region of the light valve (12, 13, 14) as respective beams each including an image bearing component of one polarization state and a second beam component of the opposite polarization state. The respective image bearing components are separated from the second components by respective analyzers and are passed into a periscope and projection lens assembly (50) to converge the three separate images at a projection aperture.

公开(公告)号：WO1986007636A1

公开(公告)日：1986-12-31

申请号：PCT/US1986001213

申请日：1986-06-03

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  HUDSON, Ralph, E. ,  NIHO, Yoji, G.

IPC: G01S13/90

CPC classification number: G01S13/90 ,  G01S7/003

Abstract: A technique for encoding SAR image data to achieve data compression. In the image encoding stage, the SAR image is transformed into a list of high reflectivity radar discretes and a small array of frequency filters. In the target list, the location data and intensity levels above the local average background clutter are tabulated for a predetermined number of the highest intensity radar discretes. The array of frequency filters is divided into three zones; the inner, middle, and higher frequency zones relative to the d.c. filter. Only the inner and middle zones of filters are retained and the outer filters are discarded, thus achieving the desired data reduction. The inner zone filters are quantized to a higher level of precision than the middle zone of filters. The saturation levels of the filters are determined adaptively. In the decoding stage, the original SAR image is reconstructed from the radar discrete list and the small array of frequency filters.

公开(公告)号：WO1986007194A1

公开(公告)日：1986-12-04

申请号：PCT/US1986000892

申请日：1986-04-23

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  BUNSHAH, Rointan, F. ,  PARSONS, James, D. ,  STAFSUDD, Oscar, M.

IPC: H01L29/24

CPC classification number: H01L29/1608 ,  Y10T428/263

Abstract: A semiconductor device wafer base wherein devices may be fabricated in silicon carbide, the base having a compatible substrate and a beta silicon carbide overlay layer epitaxially related to the substrate, the beta silicon carbide layer being unpolytyped, single crystal, uncracked, without twins, and having integrated circuit quality surface morphology. Preferably, the substrate is a single crystal of titanium carbide, which is the same cubic lattice-type as beta silicon carbide with a lattice parameter different from that of beta silicon carbide by less than about 1%. Additionally, the thermal expansion coefficients of beta silicon carbide and titanium carbide are nearly the same, minimizing the creation of thermal stresses during cooling and heating. The beta silicon carbide is useful in fabricating semiconductor devices for use at much higher temperature than is silicon, and for use at high power levels, at high frequencies, and in radiation hardened applications. The device base may be fabricated by any suitable technique, including reactive deposition and chemical vapor deposition.

Abstract translation: 一种半导体器件晶片基底，其中器件可以制造在碳化硅中，所述基底具有兼容的衬底和与衬底外延相关的β碳化硅覆盖层，β碳化硅层未折射，单晶，未裂纹，无双胞胎，以及 具有集成电路质量的表面形态。 优选地，基体是碳化钛的单晶，其是与β碳化硅相同的立方晶格型，具有与β碳化硅的晶格参数不同于小于约1％的晶格参数。 此外，β碳化硅和碳化钛的热膨胀系数几乎相同，在冷却和加热期间最小化热应力的产生。 β碳化硅可用于制造比硅高得多的温度使用的半导体器件，并且在高功率级别，高频率和辐射硬化应用中使用。 器件基底可以通过任何合适的技术制造，包括反应沉积和化学气相沉积。

公开(公告)号：WO1986006539A2

公开(公告)日：1986-11-06

申请号：PCT/US1986000646

申请日：1986-03-31

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  BOHAC, Frank, J., Jr.

IPC: G11C17/00

CPC classification number: H02M3/073 ,  G11C5/145

Abstract: The circuit comprises three p-channel MOS transistors and three capacitors. When these elements are connected to properly phased transfer and pump clock signals of positive polarity, the circuit generates a negative output voltage which is roughly equal in magnitude to the peak-to-peak voltage of the pump clock. One of the transistors couples the output node to the circuit input node, and is clocked by the transfer clock so as to isolate the input node from the output node when the output node potential is lower than the input node potential. Several of the circuits may be cascaded to produce a large negative supply from a small positive supply. The circuit is advantageously employed to provide the programming signal supply for EEPROM devices.

Abstract translation: 该电路包括三个p沟道MOS晶体管和三个电容器。 当这些元件连接到正极转移和泵浦正极性的时钟信号时，该电路产生一个与泵时钟的峰 - 峰电压大致相等的负输出电压。 其中一个晶体管将输出节点耦合到电路输入节点，并由传输时钟计时，以便当输出节点电位低于输入节点电位时，将输入节点与输出节点隔离。 可以将几个电路级联以从小的正电源产生大的负电源。 该电路有利地用于为EEPROM器件提供编程信号供应。

公开(公告)号：WO1986005890A1

公开(公告)日：1986-10-09

申请号：PCT/US1986000643

申请日：1986-03-27

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  RUE, Arthur, K. ,  POPE, Gordon, T. ,  EMERSON, Earl, L.

IPC: G01S03/78

CPC classification number: G01S3/7864 ,  G01S3/7865

Abstract: Point and area target tracking are employed by a dual mode video tracker which includes both a correlation processor (30) and a centroid processor (32) for processing incoming video signals representing the target scene (20) and for generating tracking error signals over an entire video frame. A microcomputer (26) controls the operation of the correlation and centroid processors, as well as a preprocessor (28) which preconditions the incoming video signals. The tracker operates in any of several modes in which the correlation and centroid processors function either independently or cooperatively with each other. The correlation processor generates a reference map in pixel format which is used to produce azimuth and elevation optimal weighting values for each pixel in the field-of-view. The reference map is recursively updated. The track gate for the correlation processor is automatically sized using a gradient function derived from the optimal weighting values. The gradient function is also employed along with difference video to determine correlation tracking status. The correlation and centroid tracking errors may be combined to form a composite signal defining a true complementary function.

Abstract translation: 点模式和区域目标跟踪由双模式视频跟踪器采用，该双模式视频跟踪器包括相关处理器（30）和质心处理器（32），用于处理表示目标场景（20）的输入视频信号，并用于在整个图像上产生跟踪误差信号 视频帧。 微型计算机（26）控制相关和质心处理器的操作，以及预处理输入视频信号的预处理器（28）。 跟踪器以几种模式操作，其中相关性和质心处理器彼此独立地或协作地起作用。 相关处理器生成像素格式的参考地图，其用于为视场中的每个像素产生方位角和仰角最佳加权值。 参考图是递归更新的。 使用从最佳加权值导出的梯度函数自动调整相关处理器的轨道大小。 梯度函数还与差分视频一起使用以确定相关跟踪状态。 可以将相关和质心跟踪误差组合以形成定义真正互补函数的复合信号。

公开(公告)号：WO1986005607A1

公开(公告)日：1986-09-25

申请号：PCT/US1985002306

申请日：1985-11-25

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  GRINBERG, Jan ,  SOFFER, Bernard, H.

IPC: G06G09/00

CPC classification number: G06E3/005

Abstract: A programmable optical data processor is described as an apparatus for processing an optical data beam comprising a plurality of zero, one and two-dimensional modulators for spatially modulating the optical data beam, means for the lensless interconnection of each of the modulators to provide for the focusless transfer of the optical data beam between the modulators, and means for controlling the plurality of modulators so as to permit the programmable processing of the optical data beam. The optical data processor realized is physically solid and compact and is readily capable of performing a wide variety of optical computations.

Abstract translation: 可编程光学数据处理器被描述为用于处理包括用于空间调制光学数据光束的多个零，一维和二维调制器的光学数据光束的装置，用于每个调制器的无透镜互连的装置， 调制器之间的光学数据光束的无焦点传输，以及用于控制多个调制器以便允许光学数据光束的可编程处理的装置。 实现的光学数据处理器物理上坚固紧凑，并且能够执行各种各样的光学计算。

公开(公告)号：WO1986005285A1

公开(公告)日：1986-09-12

申请号：PCT/US1986000042

申请日：1986-01-13

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  WREEDE, John, E.

IPC: G03H01/18

CPC classification number: G03H1/18 ,  G03C1/66 ,  Y10S359/90

Abstract: A layer of material having relatively low light sensitivity is interposed between a substrate and a light sensitive recording medium during recording of a slant fringe hologram. The layer frees the ends of the fringes from the substrate to permit greater expansion during a subsequent chemical swelling process, thereby resulting in a slant fringe hologram having improved efficiency. In one embodiment, a separate layer of light insensitive material is applied to the substrate prior to application of the recording medium. In another embodiment, a separate layer of light sensitive material is applied to the substrate and is then desensitized by exposure to incoherent light or by heat treatment prior to application of the recording medium.