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1.发明授权公开(公告)号：US06208152B1
公开(公告)日：2001-03-27
申请号：US09418545
申请日：1999-10-14
IPC分类号： G01R1900
CPC分类号： G01R27/08
摘要： A redundant resistor matching detector is provided with constant percentage threshold. The redundant resistor matching detector includes a voltage reference and a first operational amplifier, a second operational amplifier, a first potentiometer and a reference potentiometer. The first operational amplifier has a first input connected to a first potentiometer. The second operational amplifier has a first input connected to the reference potentiometer. The first operational amplifier and the second operational amplifier have a reference input coupled to the voltage reference. An input current mirror is coupled to the first potentiometer providing a first current. A first reference current mirror is coupled to the reference potentiometer providing a reference current. A second reference current mirror has an input coupled to a first output of the first reference current mirror and has a first output coupled to an output of the input current mirror. A pair of series connected resistors are connected between a second output of both the first reference current mirror and the second reference current mirror. A resistor is connected between a junction of the pair of series connected resistors and the first outputs of the input current mirror and the second reference current mirror.
摘要翻译： 冗余电阻匹配检测器具有恒定百分比阈值。 冗余电阻匹配检测器包括电压基准和第一运算放大器，第二运算放大器，第一电位计和参考电位计。 第一运算放大器具有连接到第一电位计的第一输入端。 第二运算放大器具有连接到参考电位计的第一输入。 第一运算放大器和第二运算放大器具有耦合到电压基准的参考输入。 输入电流镜耦合到提供第一电流的第一电位计。 第一参考电流镜耦合到提供参考电流的参考电位器。 第二参考电流镜具有耦合到第一参考电流镜的第一输出的输入，并且具有耦合到输入电流镜的输出的第一输出。 一对串联电阻器连接在第一参考电流反射镜和第二参考电流镜之间的第二输出端上。 电阻器连接在一对串联电阻器的一个连接点与输入电流镜和第二参考电流镜的第一个输出端之间。
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公开(公告)号：US5999549A
公开(公告)日：1999-12-07
申请号：US20553
申请日：1998-02-09
CPC分类号： H01S5/06825 , H01S3/0014
摘要： A method and apparatus are provided for laser safety. A fault detector detects laser fault conditions and generates a laser fault control signal. A laser fault counter is coupled to the fault detector for counting laser fault conditions and for generating a disable laser control signal responsive to a predetermined fault count. A reset timer is coupled to the laser fault counter for identifying a predetermined reset time period responsive to the laser fault control signal and applying a reset signal to the laser fault counter. Features of laser safety method and apparatus of the invention are that the laser fault counter is reset if a second laser fault condition is not detected within the predetermined reset time period after the laser is turned on. The disable laser control signal is not generated when a safe laser optical power condition occurs between two laser fault conditions.
摘要翻译： 提供了用于激光安全的方法和装置。 故障检测器检测激光故障状况并产生激光故障控制信号。 激光故障计数器耦合到故障检测器，用于对激光器故障状况进行计数，并且响应于预定的故障计数产生禁用的激光控制信号。 复位定时器耦合到激光故障计数器，用于响应于激光故障控制信号识别预定的复位时间周期，并将复位信号施加到激光故障计数器。 本发明的激光安全方法和装置的特征在于，在激光打开之后的预定复位时间段内没有检测到第二激光故障条件时，激光故障计数器被复位。 在两个激光故障条件之间发生安全的激光光功率条件时，不产生禁用激光控制信号。
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公开(公告)号：US5757998A
公开(公告)日：1998-05-26
申请号：US724400
申请日：1996-10-02
CPC分类号： G02B6/4277 , G02B6/4201 , G02B6/4245 , G02B6/4261 , G02B6/4269 , G02B6/4281 , G02B6/4283 , G02B6/4284 , G02B6/4292
摘要： A package for containing a high speed electronic assembly has a small physical size, shielding, pluggability, and is capable of operating at multigigabit transmission rates. The package includes a module and a cover which covers at least the top of the module. An optical assembly and a circuit packaging are inserted into the module. The package, with an appropriate cover, can be removed and inserted without disturbing other packages secured on the board. The circuit packaging is electrically connected to the board through bump connectors, while the circuit packaging itself supplies a normal force for insuring the bump connectors are in contact with the board. The package is attached to the board using an attachment member which is separate from the bump connectors. The bump connectors facilitate high speed transmission. Alignment pins may be used to improve mechanical stability, provide feedback indicative of proper insertion, and to prevent bump connectors from contacting the board until the module is properly positioned. Electromagnetic interference shielding may be provided in the cover. The cover and various components of the module serve as heat sinks for the module. The cover, the pattern of the bump connectors and the positioning of the alignment pins may be selected/altered by an end user without affecting the construction of the module.
摘要翻译： 用于容纳高速电子组件的包装具有小的物理尺寸，屏蔽性，可插拔性，并且能够以千兆位传输速率运行。 该包装包括至少覆盖模块顶部的模块和盖。 将光学组件和电路封装插入模块中。 具有适当盖子的包装可以被移除并插入，而不会干扰固定在板上的其他包装。 电路封装通过凸块连接器电连接到电路板，而电路封装本身提供法向力以确保凸块连接器与板接触。 使用与凸块连接器分开的附接构件将包装件附接到板上。 凸块连接器便于高速传输。 对准销可用于提高机械稳定性，提供指示正确插入的反馈，以及防止凸块连接器接触板，直到模块正确定位。 可以在盖中提供电磁干扰屏蔽。 模块的盖子和各种部件用作模块的散热器。 盖子，凸块连接器的图案和对准销的定位可以由终端用户选择/改变，而不影响模块的结构。
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