公开(公告)号：US06853696B1

公开(公告)日：2005-02-08

申请号：US09466665

申请日：1999-12-20

申请人： James Moser ,  Matthew D. Brown ,  Michel Pigeon ,  Marc A. Nadeau ,  Chung Y. Wu

发明人： James Moser ,  Matthew D. Brown ,  Michel Pigeon ,  Marc A. Nadeau ,  Chung Y. Wu

IPC分类号： H03L7/087 ,  H03L7/091 ,  H03L7/095 ,  H03L7/113 ,  H04L7/033 ,  H03D3/24

CPC分类号： H03L7/095 ,  H03L7/087 ,  H03L7/091 ,  H03L7/113 ,  H04L7/033

摘要： A system for recovering a clock signal from a data signal is described. The system uses an oscillator adapted to generate an oscillator output signal, a first detecting circuit for obtaining a coarse frequency-lock condition between the data signal and a recovered clock signal, a second detecting circuit for obtaining a phase-locked condition between the data signal and the recovered clock signal, a lock-detecting circuit responsive to the first detecting circuit for detecting an out-of-lock condition between the data signal and the recovered clock signal, and a control circuit responsive to the lock-detecting circuits and adapted to control the oscillator to generate an oscillator output signal on the basis of the first detecting circuit during an out-of-lock condition, and otherwise to generate the oscillator output signal on the basis of the second detecting circuit. The advantages include a much wider pull-in range for frequency acquisition, and an accurate and robust measure of a quality of received data.

摘要翻译： 描述用于从数据信号恢复时钟信号的系统。 该系统使用适于产生振荡器输出信号的振荡器，用于获得数据信号与恢复的时钟信号之间的粗略频率锁定状态的第一检测电路，用于获得数据信号之间的锁相状态的第二检测电路 以及恢复的时钟信号，响应于第一检测电路的锁定检测电路，用于检测数据信号和恢复的时钟信号之间的失锁状态，以及响应于锁定检测电路的控制电路， 控制振荡器以在失锁状态下基于第一检测电路产生振荡器输出信号，否则将根据第二检测电路产生振荡器输出信号。 优点包括频率采集的更宽的拉入范围以及接收数据质量的准确和可靠的测量。

公开(公告)号：US4596501A

公开(公告)日：1986-06-24

申请号：US583214

申请日：1984-02-24

申请人： Chung Y. Wu

发明人： Chung Y. Wu

IPC分类号： B23C3/18

CPC分类号： B23C3/18 ,  B23C2215/56 ,  Y10T409/30112 ,  Y10T409/303752

摘要： A method of flank milling complex surfaces comprising the steps of analyzing the design surface to determine discrete areas in which straight lines can be drawn, determining straight lines in the discrete areas, transposing the coordinates of these straight lines and comparing them with the flank tool cutter positions, determining the tool positions to said straight lines, back generating the contact lines of said surface and comparing these with the design surface, determining the number of passes of said cutter tool and generating data for numerical control machining.

摘要翻译： 一种侧面铣削复杂表面的方法，包括以下步骤：分析设计表面以确定其中可以绘制直线的离散区域，确定离散区域中的直线，转置这些直线的坐标并将其与侧面刀具刀具进行比较 位置，确定所述直线的刀具位置，反向产生所述表面的接触线并将其与设计表面进行比较，确定所述刀具的通过次数并产生用于数控加工的数据。

公开(公告)号：US08826784B2

公开(公告)日：2014-09-09

申请号：US13219872

申请日：2011-08-29

申请人： Chung Y. Wu

发明人： Chung Y. Wu

IPC分类号： B23C3/18 ,  B23C5/10 ,  B26D3/00

CPC分类号： B23C3/18 ,  B23C5/10 ,  B23C2210/086 ,  B23C2215/44 ,  Y10T29/4932 ,  Y10T29/49325 ,  Y10T82/16 ,  Y10T407/1946

摘要： A method of machining an airfoil includes the steps of providing first and second cutting tools respectively having first and second cutting contours that are different than one another. A blank is cut with the first cutting tool to provide a first airfoil surface on a first blade. The blank is cut with the second cutting tool to provide a second airfoil surface on a second blade. An airfoil is produced having the first and second blades. A cutting tool for machining the airfoil includes a shank. A cutting surface adjoins the shank and provides a cutting contour corresponding to an airfoil surface. The cutting surface extends along a cutting length axially from a nose to near a cutting boundary. The cutting length is configured to be greater than the blade length.

摘要翻译： 一种加工翼型件的方法包括以下步骤：提供分别具有彼此不同的第一和第二切割轮廓的第一和第二切割工具。 用第一切削工具切割坯件以在第一刀片上提供第一翼型表面。 用第二切削工具切割坯件，以在第二刀片上提供第二翼型件表面。 制造具有第一和第二叶片的翼型件。 用于加工翼型的切削工具包括柄。 切割表面邻接柄，并提供对应于翼面表面的切割轮廓。 切割表面沿切割长度从鼻部轴向延伸到切割边界附近。 切割长度被配置为大于刀片长度。

公开(公告)号：US06735725B1

公开(公告)日：2004-05-11

申请号：US09672789

申请日：2000-09-29

申请人： Chung Y. Wu ,  Ping W. Wan

发明人： Chung Y. Wu ,  Ping W. Wan

IPC分类号： G06F1100

CPC分类号： H04L1/0057 ,  H04J14/0221 ,  H04W52/20 ,  H04W52/34 ,  H04W52/50

摘要： A method and apparatus for performing optical channel performance management on a WDM system while in operation is disclosed in which each transmitter and receiver uses forward error-correction schemes to improve the BER performance of the channel in a known relation to the performance before error-correction. The receiver measures the BER performance before error-correction in real-time and communicates it to a system manager which determines, from this data, the appropriate launch power of each transmitter in the system, which it commands each transmitter to adopt, thereby ensuring relative launch powers which optimize the overall BER performance of the WDM multiplexed signal.

摘要翻译： 公开了一种在操作中在WDM系统上执行光信道性能管理的方法和装置，其中每个发射机和接收机使用前向纠错方案来改善与纠错之前的性能已知关系的信道的BER性能 。 接收机实时测量误差校正前的BER性能，并将其传送给系统管理员，该系统管理器从该数据中确定系统中每个发射机的适当发射功率，该命令指示每个发射机采用，从而确保相对 发射功率优化了WDM复用信号的整体BER性能。

公开(公告)号：US20130051939A1

公开(公告)日：2013-02-28

申请号：US13219872

申请日：2011-08-29

申请人： Chung Y. Wu

发明人： Chung Y. Wu

IPC分类号： B23P15/02 ,  B23C5/10

CPC分类号： B23C3/18 ,  B23C5/10 ,  B23C2210/086 ,  B23C2215/44 ,  Y10T29/4932 ,  Y10T29/49325 ,  Y10T82/16 ,  Y10T407/1946

摘要： A method of machining an airfoil includes the steps of providing first and second cutting tools respectively having first and second cutting contours that are different than one another. A blank is cut with the first cutting tool to provide a first airfoil surface on a first blade. The blank is cut with the second cutting tool to provide a second airfoil surface on a second blade. An airfoil is produced having the first and second blades. A cutting tool for machining the airfoil includes a shank. A cutting surface adjoins the shank and provides a cutting contour corresponding to an airfoil surface. The cutting surface extends along a cutting length axially from a nose to near a cutting boundary. The cutting length is configured to be greater than the blade length.

摘要翻译： 一种加工翼型件的方法包括以下步骤：提供分别具有彼此不同的第一和第二切割轮廓的第一和第二切割工具。 用第一切削工具切割坯件以在第一刀片上提供第一翼型表面。 用第二切削工具切割坯件，以在第二刀片上提供第二翼型件表面。 制造具有第一和第二叶片的翼型件。 用于加工翼型的切削工具包括柄。 切割表面邻接柄，并提供对应于翼面表面的切割轮廓。 切割表面沿切割长度从鼻部轴向延伸到切割边界附近。 切割长度被配置为大于刀片长度。

公开(公告)号：US07101263B2

公开(公告)日：2006-09-05

申请号：US10289493

申请日：2002-11-06

申请人： Brian J. Schwartz ,  Bernard D. Vaillette ,  Chung Y. Wu ,  Gennaro J. Colacino ,  Allan B. Packman

发明人： Brian J. Schwartz ,  Bernard D. Vaillette ,  Chung Y. Wu ,  Gennaro J. Colacino ,  Allan B. Packman

IPC分类号： B24B1/00

CPC分类号： B24D7/18 ,  B24B19/14

摘要： The present invention relates to a quill to be used to superabrasively machine complex shapes, such as airfoil shapes, into a substrate. The quill has a shaft portion, an enlarged head portion adjacent the shaft portion, and a tapered grinding portion adjacent the enlarged head portion. The tapered grinding portion has a layer of grit material selected from the group consisting of diamonds and cubic boron nitride thereon. In a preferred embodiment, the quill is a vitrified or plated cubic boron nitride quill on the grinding portion. A method of using the tool is also disclosed.

摘要翻译： 本发明涉及一种用于将诸如翼型形状的复杂形状超级加工到基材中的套筒。 针筒具有轴部，与轴部相邻的扩大头部，以及与扩大头部相邻的锥形磨削部。 锥形研磨部分具有选自由金刚石和立方氮化硼组成的组中的砂砾材料层。 在优选实施例中，套筒是磨削部分上的玻璃化或电镀立方氮化硼针筒。 还公开了使用该工具的方法。

公开(公告)号：US5140401A

公开(公告)日：1992-08-18

申请号：US674666

申请日：1991-03-25

申请人： Ming D. Ker ,  Chung Y. Lee ,  Chung Y. Wu ,  Joe Ko

发明人： Ming D. Ker ,  Chung Y. Lee ,  Chung Y. Wu ,  Joe Ko

IPC分类号： H01L27/02

CPC分类号： H01L27/0251

摘要： A circuit for protecting a CMOS device against execssive voltages has two SCR circuits in which the bipolar transistors are formed as parasitic devices. One SCR circuit is connected between a line to be protected and one power supply point and the other SCR circuit is connected between the line to be protected and the other power supply point. The power supply points form sinks for currents associated with excessive voltages, and they form reference potential points for establishing the voltage at which an SCR turns on. A semiconductor device having an n-substrate has three p-wells. The center p-well (as seen in section) forms part of two vertical transistors, one for each of the two SCR's. Each outer p-well cooperates with the center p-well and the intervening substrate to form a lateral transistor for one of the SCR's. These transistors use shared semiconductor regions that establish the base to collector interconnections of an SCR. These regions and other structures also form an FET and a diode in each SCR circuit that turn on the SCR in response to an excessive voltage.

摘要翻译： 用于保护CMOS器件免受执行电压的电路具有两个SCR电路，其中双极晶体管形成为寄生器件。 一个SCR电路连接在要保护的线路和一个电源点之间，另一个SCR电路连接在要保护的线路和另一个电源点之间。 电源点形成与过电压相关的电流的吸收点，并且它们形成用于建立SCR导通的电压的参考电位点。 具有n衬底的半导体器件具有三个p阱。 中心p阱（如部分所示）构成两个垂直晶体管的一部分，一个用于两个SCR的每一个。 每个外部p阱与中心p阱和中间衬底配合以形成用于SCR之一的横向晶体管。 这些晶体管使用建立SCR的基极到集电极互连的共享半导体区域。 这些区域和其他结构还在每个SCR电路中形成FET和二极管，以响应于过高的电压而导通SCR。