公开(公告)号：US4877976A

公开(公告)日：1989-10-31

申请号：US257897

申请日：1988-10-13

申请人： Lawrence E. Lach ,  Mikiharu Ohoka

发明人： Lawrence E. Lach ,  Mikiharu Ohoka

IPC分类号： H03K19/094 ,  H03K19/0952

CPC分类号： H03K19/0952 ,  H03K19/09403

摘要： A group III-V digital logic circuit which includes either at least two enhancement type metal semiconductor field effect transistors and one load element or two first type field effect transistors having a first threshold voltage and two second type field effect transistors having a second threshold voltage, for providing a logic operation. The second threshold voltage is less than zero and is less than the first threshold voltage. The group III-V digital logic circuit can be formed as an integrated circuit on, in particular, a GaAs substrate. The field effect transistor can be either a metal semiconductor field effect transistor or a junction field effect transistor.

摘要翻译： 一种III-V族数字逻辑电路，其包括至少两个增强型金属半导体场效应晶体管和一个具有第一阈值电压的负载元件或两个第一类型场效应晶体管和具有第二阈值电压的两个第二类型场效应晶体管， 用于提供逻辑运算。 第二阈值电压小于零并且小于第一阈值电压。 III-V族数字逻辑电路可以形成为特别是GaAs衬底上的集成电路。 场效应晶体管可以是金属半导体场效应晶体管或结型场效应晶体管。

公开(公告)号：US20090046259A1

公开(公告)日：2009-02-19

申请号：US11839244

申请日：2007-08-15

申请人： Lawrence E. Lach ,  Ion V. Nicolaescu

发明人： Lawrence E. Lach ,  Ion V. Nicolaescu

IPC分类号： G03B21/26 ,  G03B21/28

CPC分类号： G02B26/101 ,  H04N9/3129 ,  H04N9/3173

摘要： A method and apparatus that projects a two-dimensional image is disclosed. The method may include emitting a laser beam, sweeping the laser beam with a first scan mirror along a first scan direction to form a scan line on the projection surface, and sweeping the scan line with a second scan mirror along a second scan direction generally orthogonal to the first scan direction to form a raster pattern of scan lines on the projection surface. The scanner for the first scan mirror is driven with a stimulus waveform, wherein the stimulus waveform has a fundamental frequency that is substantially equal to the resonance frequency of the scanner but also contains harmonics to achieve a nearly constant velocity of the laser beam spot during its scan across the projection surface. The stimulus thereby reduces peak laser output power and corresponding noise generation while maintaining image brightness and image quality.

摘要翻译： 公开了投影二维图像的方法和装置。 该方法可以包括发射激光束，沿着第一扫描方向用第一扫描反射镜扫描激光束，以在投影表面上形成扫描线，并且沿第二扫描方向扫描线，扫描线沿第二扫描方向大致正交 到第一扫描方向以在投影表面上形成扫描线的光栅图案。 用于第一扫描镜的扫描器由刺激波形驱动，其中刺激波形具有基本上等于扫描仪的共振频率的基本频率，但是还包含谐波以在其期间实现几乎恒定的激光束点速度 扫描投影面。 刺激因此降低峰值激光输出功率和相应的噪声产生，同时保持图像亮度和图像质量。

公开(公告)号：US20080106493A1

公开(公告)日：2008-05-08

申请号：US11556303

申请日：2006-11-03

申请人： Lawrence E. Lach ,  Tomasz L. Klosowiak ,  Zili Li ,  George T. Valliath ,  Dmitry Voloschenko ,  Min-Xian M. Zhang

发明人： Lawrence E. Lach ,  Tomasz L. Klosowiak ,  Zili Li ,  George T. Valliath ,  Dmitry Voloschenko ,  Min-Xian M. Zhang

IPC分类号： G09G3/14

CPC分类号： G09G3/02 ,  G09G3/14 ,  G09G2310/0235 ,  G09G2360/18 ,  H04N9/3129 ,  H04N9/3155

摘要： A laser image projector display system (200) includes laser operating electronics (208, 210, 212, 400, 500, 700) that selectively operates a laser diode at a bias that is low enough to save energy based on analysis pixel brightness values. The laser bias may be high enough that laser can be transitioned to a lasing state in time to display a pixel, or the system can “look ahead” into a stream of pixels and adjust the bias in advance.

摘要翻译： 激光图像投影仪显示系统（200）包括激光器操作电子器件（208,210,212,400,500,700），其以低到足以基于分析像素亮度值来节省能量的偏压选择性地操作激光二极管。 激光偏压可能足够高，使得激光可以在时间上转换到激光状态以显示像素，或者系统可以“向前看”到像素流中并且预先调整偏差。

公开(公告)号：US4636654A

公开(公告)日：1987-01-13

申请号：US784983

申请日：1985-10-07

申请人： Lawrence E. Lach

发明人： Lawrence E. Lach

IPC分类号： H03K3/356 ,  H04L25/40 ,  H04B1/24 ,  H04L25/08

CPC分类号： H03K3/356017 ,  H04L25/40

摘要： A gallium arsenide differential line receiver circuit has a first and second receiver means for receiving first and second differential input signal voltages. A pair of depletion transistor means for transforming the signal voltages into corresponding signal currents provides pull-up, and the depletion transistors have their gates operatively connected to the first and second receiver means. A pair of enhancement transistor means is operatively connected to the pair of depletion transistor means for outputting a gallium arsenide signal representation of the first and second differential input signal voltages. Positive feedback is provided for increasing the gain of the pair of enhancement transistors and is operatively connected to the pair of enhancement transistors. Shunting means is also provided for reducing hysteresis switching and is operatively connected to the pair of enhancement transistors.

摘要翻译： 砷化镓差分线路接收器电路具有用于接收第一和第二差分输入信号电压的第一和第二接收器装置。 用于将信号电压变换成相应信号电流的一对耗尽晶体管装置提供上拉电路，并且耗尽晶体管的栅极可操作地连接到第一和第二接收器装置。 一对增强晶体管装置可操作地连接到一对耗尽晶体管装置，用于输出第一和第二差分输入信号电压的砷化镓信号表示。 提供正反馈以增加一对增强型晶体管的增益，并且可操作地连接到该对增强型晶体管。 还提供了分流装置用于减少滞后开关，并且可操作地连接到一对增强型晶体管。

公开(公告)号：US07729028B2

公开(公告)日：2010-06-01

申请号：US11839244

申请日：2007-08-15

申请人： Lawrence E. Lach ,  Ion V. Nicolaescu

发明人： Lawrence E. Lach ,  Ion V. Nicolaescu

IPC分类号： G02B26/08

CPC分类号： G02B26/101 ,  H04N9/3129 ,  H04N9/3173

摘要： A method and apparatus that projects a two-dimensional image is disclosed. The method may include emitting a laser beam, sweeping the laser beam with a first scan mirror along a first scan direction to form a scan line on the projection surface, and sweeping the scan line with a second scan mirror along a second scan direction generally orthogonal to the first scan direction to form a raster pattern of scan lines on the projection surface. The scanner for the first scan mirror is driven with a stimulus waveform, wherein the stimulus waveform has a fundamental frequency that is substantially equal to the resonance frequency of the scanner but also contains harmonics to achieve a nearly constant velocity of the laser beam spot during its scan across the projection surface. The stimulus thereby reduces peak laser output power and corresponding noise generation while maintaining image brightness and image quality.

摘要翻译： 公开了投影二维图像的方法和装置。 该方法可以包括发射激光束，沿着第一扫描方向用第一扫描反射镜扫描激光束，以在投影表面上形成扫描线，并且沿第二扫描方向扫描线，扫描线沿第二扫描方向大致正交 到第一扫描方向以在投影表面上形成扫描线的光栅图案。 用于第一扫描镜的扫描器由刺激波形驱动，其中刺激波形具有基本上等于扫描仪的共振频率的基本频率，但是还包含谐波以在其期间实现几乎恒定的激光束点速度 扫描投影面。 刺激因此降低峰值激光输出功率和相应的噪声产生，同时保持图像亮度和图像质量。

公开(公告)号：US5994997A

公开(公告)日：1999-11-30

申请号：US976467

申请日：1997-11-24

申请人： Vernon L. Brown ,  Gregory J. Dunn ,  Lawrence E. Lach

发明人： Vernon L. Brown ,  Gregory J. Dunn ,  Lawrence E. Lach

IPC分类号： H01C1/012 ,  H01C1/148 ,  H01C1/16 ,  H01C17/28 ,  H05K1/09 ,  H05K1/11 ,  H05K1/16 ,  H05K3/00 ,  H05K3/46

CPC分类号： H05K1/167 ,  H01C1/012 ,  H01C1/148 ,  H01C1/16 ,  H01C17/281 ,  H05K1/095 ,  H05K1/116 ,  H05K2201/09509 ,  H05K2203/1453 ,  H05K3/0023 ,  H05K3/4644 ,  Y10T29/49099 ,  Y10T29/49101

摘要： A thick-film resistor and a process for forming the resistor to have accurate dimensions, thereby yielding a precise resistance value. The resistor generally includes an electrically resistive layer and a pair of terminals, a first of which is surrounded by the second terminal, so as to form a region therebetween that surrounds the first terminal and separates the first and second terminals. The terminals are preferably concentric, with the second terminal and the region therebetween being annular-shaped. The resistive layer electrically connects the first and second terminals to complete the resistor. Each of the terminals has a surface that is substantially parallel to an upper and/or lower surface of the resistive layer and contacts the resistive layer. The surfaces of the terminals may be embedded in the resistive layer by printing the resistive material over the terminals, or may contact the upper or lower surface of the resistive layer by locating the terminals above or below the resistive layer. In each of these embodiments, the terminals are not limited to having edge-to-edge contact with the resistive layer, such that the interfacial resistance therebetween is minimized.

公开(公告)号：US4789798A

公开(公告)日：1988-12-06

申请号：US923539

申请日：1986-10-27

申请人： Lawrence E. Lach

发明人： Lawrence E. Lach

IPC分类号： H03K3/356 ,  H03K19/0185 ,  H03K19/092 ,  H03K3/29 ,  H03K19/094

CPC分类号： H03K3/356017 ,  H03K19/018535

摘要： A gallium arsenide device converts an ECL voltage signal to a gallium arsenide voltage signal. The device has a pair of depletion transistors for transforming the ECL voltage signal and a predetermined reference voltage into corresponding signal and reference currents to provide pull-up. A pair of enhancement transistors are connected to the pair of depletion transistor for outputting the gallium arsenide voltage signal which is representative of the ECL voltage signal. Positive feedback means for increasing the gain of the pair of enhancement transistors is provided and is connected to the pair of enhancement transistors. The predetermined reference voltage may be derived from a set voltage source or may be derived from a logical one level in the ECL circuit so as to provide temperature tracking for the gallium arsenide circuit. At least a third depletion transistor is connected to a third enhancement transistor. The third enhancement transistor has a gate connected to the output of the pair of depletion transistors. The third depletion and enhancement transistors have a substantially similar structure and topology to the pair of depletion and enhancement transistors.

摘要翻译： 砷化镓器件将ECL电压信号转换为砷化镓电压信号。 该器件具有一对耗尽晶体管，用于将ECL电压信号和预定参考电压变换成相应的信号和参考电流以提供上拉。 一对增强晶体管连接到一对耗尽晶体管，用于输出代表ECL电压信号的砷化镓电压信号。 提供了用于增加一对增强型晶体管的增益的正反馈装置，并连接到该对增强型晶体管。 预定参考电压可以从设定电压源导出，或者可以从ECL电路中的逻辑一电平导出，以便为砷化镓电路提供温度跟踪。 至少第三耗尽晶体管连接到第三增强晶体管。 第三增强晶体管具有连接到该对耗尽晶体管的输出端的栅极。 第三耗尽和增强晶体管具有与一对耗尽和增强晶体管基本相似的结构和拓扑结构。

公开(公告)号：US4712061A

公开(公告)日：1987-12-08

申请号：US831898

申请日：1986-02-24

申请人： Lawrence E. Lach

发明人： Lawrence E. Lach

IPC分类号： G01R25/00 ,  G01R29/027 ,  G04F10/00

CPC分类号： G04F10/00 ,  G01R25/00 ,  G01R29/0273

摘要： A circuit for measuring small propagation delays associated with a digital logic circuit has first and second signal paths. The first signal path in the digital logic circuit has at least a first predetermined number of devices and has an input and an output. Similarly, the second signal path in the digital logic circuit has at least a second predetermined number of devices and also has an input and an output. The first predetermined number of devices is different than the second predetermined number of devices. An input multiplexer multiplexes a predetermined input signal to the inputs of the first and second signal paths. First and second output signals are thereby produced on the outputs of the first and second signal paths, respectively. An output multiplexer causes the output signals to be combined into a single multiplexed output signal. An average propagation delay is determined from the differential area between the output signals in the multiplexed output signal.

摘要翻译： 用于测量与数字逻辑电路相关联的小传播延迟的电路具有第一和第二信号路径。 数字逻辑电路中的第一信号路径具有至少第一预定数量的设备，并且具有输入和输出。 类似地，数字逻辑电路中的第二信号路径具有至少第二预定数量的设备，并且还具有输入和输出。 第一预定数量的设备与第二预定数量的设备不同。 输入多路复用器将预定的输入信号复用到第一和第二信号路径的输入端。 因此，分别在第一和第二信号路径的输出上产生第一和第二输出信号。 输出多路复用器将输出信号组合成单个复用输出信号。 平均传播延迟由复用的输出信号中的输出信号之间的差分区域确定。

公开(公告)号：US4374328A

公开(公告)日：1983-02-15

申请号：US257825

申请日：1981-04-27

申请人： Vincent J. Tekippe ,  Lawrence E. Lach

发明人： Vincent J. Tekippe ,  Lawrence E. Lach

IPC分类号： G01K11/32 ,  G01L11/02 ,  F21V9/16 ,  G01J5/00 ,  G01J5/48

CPC分类号： G01K11/3213 ,  G01L11/02

摘要： A photoluminescent indicator apparatus having automatic feedback means to maintain the sensitivity of the indicator apparatus with respect to variations in environmental conditions. The apparatus includes a sample of photoluminescent material having a photoluminescent decay rate which varies as a function of environmental conditions. The sample is positioned in a remote location having some unknown aspect of the environment desired to be measured. The sample is optically excited with a modulating signal to generate an excitation output signal functionally dependent on the modulating signal and indicative of the unknown environmental condition. A phase detection means is provided for comparing difference in phase between a phase reference signal and the excitation output signal to generate a phase differential signal functionally related to the photoluminescent decay rate of the sample. The indicator apparatus includes an automatic feedback means for adjusting the phase reference signal in accordance with the phase differential signal.

摘要翻译： 一种具有自动反馈装置的光致发光指示装置，用于保持指示装置相对于环境条件变化的灵敏度。 该装置包括具有根据环境条件变化的光致发光衰减率的光致发光材料的样品。 样品位于具有期望测量的环境的一些未知方面的远程位置。 样品被调制信号光学激发，以产生功能上取决于调制信号并指示未知环境条件的激励输出信号。 提供相位检测装置，用于比较相位参考信号和激励输出信号之间的相位差，以产生与样本的光致发光衰减率功能相关的相位差信号。 指示装置包括根据相位差信号调整相位参考信号的自动反馈装置。