公开(公告)号：US06504447B1

公开(公告)日：2003-01-07

申请号：US09431308

申请日：1999-10-30

申请人： David Laney ,  Mehran Matloubian ,  Lawrence Larson

发明人： David Laney ,  Mehran Matloubian ,  Lawrence Larson

IPC分类号： H03G1104

CPC分类号： H01P3/084 ,  H01H59/0009 ,  H01P1/127

摘要： The present invention provides a flexible mechanical bridge over a microstrip on a substrate, which utilizes an electromagnetic field increase, as generated by temporary power surge to shunt harmful power away from a MMIC system. The invention includes a power limiter which includes an airbridge 11, preferably in the form of an electrically conductive strip with ground contacts 1 and 3 formed thereon. The ground contacts 1 and 2 are electrically connected, through via holes 5 and 7 respectively, to a metallization layer 15 formed on the bottom side of a substrate 9. The air bridge 11 is designed such that it traverses an electrically conductive microstrip 13 forming an air gap 16 between the air bridge 11 and the electrically conductive microstrip 13. When there is a power surge the air bridge 11, will flex to cause an electrical connection with the microstrip 13, thereby directing the unwanted signal through the ground contacts 1 and 3 and the via holes 5 and 7 to the metallization layer 15.

摘要翻译： 本发明提供了在衬底上的微带上的柔性机械桥，其利用由临时电力浪涌产生的电磁场增加来将有害电力从MMIC系统分流。 本发明包括功率限制器，其包括空气桥11，优选地为形成有接地触头1和3的导电条带的形式。 接地触头1和2分别通过通孔5和7电连接到形成在基板9的底侧上的金属化层15.空气桥11被设计成穿过导电微带13，形成 空气桥11和导电微带13之间的空气间隙16.当存在电力浪涌时，空气桥11将弯曲以与微带13形成电连接，从而通过接地触点1和3引导不需要的信号 以及通孔5和7到金属化层15。

公开(公告)号：US06765452B2

公开(公告)日：2004-07-20

申请号：US10212390

申请日：2002-08-06

申请人： Xiaoming Yuan ,  Fei Wang ,  Richard S. Zhang

发明人： Xiaoming Yuan ,  Fei Wang ,  Richard S. Zhang

IPC分类号： H03G1104

CPC分类号： H02M1/12 ,  H02M7/53871

摘要： A method for damping an LC filter coupled to a converter and generating a filter signal. The method comprises sensing the filter signal and processing the filter signal to generate a corresponding feedback signal. The feedback signal is subtracted from a controller signal to generate a difference signal. The difference signal is used for damping the LC filter.

摘要翻译： 一种用于阻尼耦合到转换器并产生滤波器信号的LC滤波器的方法。 该方法包括感测滤波器信号并处理滤波器信号以产生相应的反馈信号。 从控制器信号中减去反馈信号以产生差分信号。 差分信号用于阻尼LC滤波器。

公开(公告)号：US06571393B1

公开(公告)日：2003-05-27

申请号：US09084501

申请日：1998-05-27

申请人： Tsz-Mei Ko ,  Ming Liou ,  Kwan-Fai Cheung ,  Roger Cheng ,  Bo Hu ,  Donghui Qu

发明人： Tsz-Mei Ko ,  Ming Liou ,  Kwan-Fai Cheung ,  Roger Cheng ,  Bo Hu ,  Donghui Qu

IPC分类号： H03G1104

CPC分类号： H03G5/165 ,  H03G5/00 ,  H03G5/005 ,  H04N7/106 ,  H04N7/108 ,  H04N17/004

摘要： A data transmission system is proposed, for example for video-on-demand, internet or multimedia applications, in which a number of subscribers in a building are connected to a central server through at least in part twisted pair cables within the building. Compensation for the channel distortion caused by the use of twisted pair cables is provided by the use of pre-emphasis filters in the outgoing data lines from the server. The required coefficients for the pre-emphasis filters are established by first characterizing the distortion properties of a channel by the use of a test signal.

摘要翻译： 提出了一种数据传输系统，例如用于视频点播，互联网或多媒体应用，其中建筑物中的许多用户通过至少部分地在建筑物内的双绞线电缆连接到中央服务器。 通过在服务器的输出数据线中使用预加重滤波器来提供使用双绞线电缆造成的信道失真的补偿。 通过首先通过使用测试信号来表征信道的失真特性来建立用于预加重滤波器的所需系数。

公开(公告)号：US06686809B2

公开(公告)日：2004-02-03

申请号：US10093683

申请日：2002-03-08

申请人： Christian Nystrom ,  Per Konradsson ,  Ari Grasbeck

发明人： Christian Nystrom ,  Per Konradsson ,  Ari Grasbeck

IPC分类号： H03G1104

CPC分类号： H03L7/0805 ,  H03H11/1291 ,  H03J2200/07 ,  H03J2200/10 ,  H03J2200/18 ,  H03L7/0814

摘要： The invention relates to trimming of analogue filters (201) in integrated circuits by means of an automatic adjusting circuit. A local oscillator (202) in the automatic adjusting circuit provides a periodic reference signal (R) to an adjustable phase shifter (203), which on basis thereof, produces a periodic phase shifted signal (R*). A phase detector (204) receives both the periodic reference signal (R) and the phase shifted period signal (R*) and produces a test signal (T) in response to a phase difference between the periodic reference signal (R) and the periodic phase shifted signal (R8). A lowpass filter (205) receives the test signal (T) and generates a level signal (TDC) relative a reference level, e.g. representing a zero voltage. A digital signal processor (207) produces a primary control signal (CS), having a serial format, on basis of the observation signal (M). A serial-to-parallel converter (208) converts the primary control signal (CS) into a control signal (CP) having a parallel signal format. The control signal (CP) influences a magnitude of at least one component value in the adjustable phase shift between the periodic reference signal (R) and the periodic phase shifted signal (R*) attains a calibrated value being as close as possible to a desired value. A latch (210) forwards at least one signal element of the control signal (CP) for setting of at least one component value in the analogue filter (201) in accordance with a setting of at least one component value in the adjustable phase shifter (203) which produces the calibrated value.

公开(公告)号：US06472947B1

公开(公告)日：2002-10-29

申请号：US09806643

申请日：2001-07-03

申请人： Carsten Zeitz

发明人： Carsten Zeitz

IPC分类号： H03G1104

CPC分类号： H04B7/082

摘要： An antenna circuit is described which makes it possible to suppress intermodulation products. This antenna circuit includes an antenna connection device to which at least one first antenna can be connected, and the antenna connection device can be connected to an output of the antenna circuit over at least two signal paths. An antenna signal can be transmitted over each signal path. Transmission of a second antenna signal over a second signal path is attenuated by a predetermined attenuation value in comparison with a transmission of a first antenna signal over a first signal path. An analyzer unit is provided to determine the level of a weighting signal which is derived from an antenna signal transmitted to the output of the antenna circuit. An operating device is provided to connect only the first signal path to the output of the antenna circuit when the detected level is below a first predetermined level. The operating device connects only the second signal path to the output of the antenna circuit when the detected level is above the first predetermined level.

摘要翻译： 描述了可以抑制互调产物的天线电路。 该天线电路包括能够连接至少一个第一天线的天线连接装置，并且天线连接装置可以通过至少两个信号路径连接到天线电路的输出。 天线信号可以在每个信号路径上传输。 与第一信号路径上的第一天线信号的传输相比，通过第二信号路径传输第二天线信号被衰减预定的衰减值。 提供分析器单元以确定从发送到天线电路的输出的天线信号导出的加权信号的电平。 当检测到的电平低于第一预定电平时，提供操作装置以仅将第一信号路径连接到天线电路的输出。 当检测到的电平高于第一预定电平时，操作装置仅将第二信号路径连接到天线电路的输出端。

公开(公告)号：US06239667B1

公开(公告)日：2001-05-29

申请号：US09526916

申请日：2000-03-16

申请人： Bernhard Roth

发明人： Bernhard Roth

IPC分类号： H03G1104

CPC分类号： H04L25/03885 ,  H04B3/145

摘要： Described is an attenuation equalizer for compensating an attenuation characteristic of a transmission line, including a first node and a second node, a first frequency filter unit coupled to the first node and/or to the second node for frequency filtering an applied signal, a first current source coupled to the first node in order to control a current provided by the first current source to the second node.

摘要翻译： 描述了一种用于补偿包括第一节点和第二节点的传输线的衰减特性的衰减均衡器，耦合到第一节点和/或第二节点的第一频率滤波器单元，用于对施加的信号进行频率滤波，第一 电流源耦合到第一节点，以便将由第一电流源提供的电流控制到第二节点。