公开(公告)号：US06300632B1

公开(公告)日：2001-10-09

申请号：US09418391

申请日：1999-10-14

申请人： Chien-Chang Liu ,  Carlos H. Mastrangelo

发明人： Chien-Chang Liu ,  Carlos H. Mastrangelo

IPC分类号： G61J520

CPC分类号： G01J5/06 ,  H01L27/14649

摘要： An uncooled infrared imager and associated microelectromechanical infrared detectors based on an active pixel heat balancing technique are disclosed. The imager is fabricated using a commercial CMOS process plus a simple electrochemical etch stop releasing step. The basic active pixel detector structure consists of a simple cascode CMOS amplifier in which the PMOS devices are built inside a thermally-isolated floating n-well. The intrinsic coupling of the cascode currents with the self-heating of the well forms an electrothermal feedback loop that tends to maintain the well temperature constant. By employing the heat balance between incoming infrared radiation and the PMOS device power dissipation, the responsivity of the detector is controlled by the cascode biasing current.

摘要翻译： 公开了一种基于有源像素热平衡技术的非冷却红外成像器和相关的微机电红外探测器。 使用商业CMOS工艺加上简单的电化学蚀刻停止释放步骤制造成像器。 基本有源像素检测器结构由简单的共源共栅CMOS放大器组成，其中PMOS器件构建在热隔离浮动n阱内。 共源共栅电流与阱的自加热的固有耦合形成电热反馈回路，趋向于保持阱温度恒定。 通过采用入射红外辐射和PMOS器件功耗之间的热平衡，检测器的响应度由共源共栅偏置电流控制。

公开(公告)号：US07612625B2

公开(公告)日：2009-11-03

申请号：US12070440

申请日：2008-02-19

申请人： Miaobin Gao ,  Yu-Li Hsueh ,  Chien-Chang Liu

发明人： Miaobin Gao ,  Yu-Li Hsueh ,  Chien-Chang Liu

IPC分类号： H03B5/12 ,  H03B27/00 ,  H03L7/099

CPC分类号： H03L7/0891 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/124 ,  H03B5/1271 ,  H03B5/1293 ,  H03L7/089 ,  H03L7/099

摘要： In one embodiment, the present invention includes an apparatus having a voltage controlled oscillator (VCO) to generate a first clock signal having a frequency controlled by a bias current coupling ratio of first and second bias currents, and a control circuit coupled to the VCO to generate a first pair of control signals to adjust the bias current coupling ratio. Other embodiments are described and claimed.

摘要翻译： 在一个实施例中，本发明包括具有压控振荡器（VCO）的装置，用于产生具有由第一和第二偏置电流的偏置电流耦合比率控制的频率的第一时钟信号，以及耦合到VCO的控制电路 产生第一对控制信号以调整偏置电流耦合比。 描述和要求保护其他实施例。

公开(公告)号：US20070009267A1

公开(公告)日：2007-01-11

申请号：US11165298

申请日：2005-06-22

申请人： Darren Crews ,  Shenggao Li ,  Chien-Chang Liu ,  Robert Johnston

发明人： Darren Crews ,  Shenggao Li ,  Chien-Chang Liu ,  Robert Johnston

IPC分类号： H04B10/04

CPC分类号： H04B10/504

摘要： An electrical link driver for a point-to-point link is coupled to a laser. The electrical link driver provides a modulation current to the laser.

摘要翻译： 用于点对点链路的电连接驱动器耦合到激光器。 电连接驱动器向激光器提供调制电流。

公开(公告)号：US20060126684A1

公开(公告)日：2006-06-15

申请号：US11008905

申请日：2004-12-10

申请人： Chien-Chang Liu ,  HengJu Cheng

发明人： Chien-Chang Liu ,  HengJu Cheng

IPC分类号： H01S3/00

CPC分类号： H01S5/02212 ,  H01S5/02284 ,  H01S5/024 ,  H01S5/0427 ,  H01S5/0617 ,  H01S5/06812 ,  H01S5/06832 ,  H01S5/183

摘要： Adverse effects to laser excitation ratio slope caused for example by ambient temperature maybe compensated for by adjusting drive current to the laser. The real time excitation ratio slope may be determined by dithering the code word by +/−1 least significant bit (LSB) of a digital-to-analog drive current source (DAC). A slight variation in laser output power caused by the dither may be detected and used to calculate in real time the laser excitation ratio slope. This may be used to select a drive current to compensate for ambient changes keeping the excitation ratio slope substantially constant.

摘要翻译： 通过环境温度引起的对激光激发比斜率的不利影响可以通过调节激光器的驱动电流来补偿。 可以通过使码字抖动数字 - 模拟驱动电流源（DAC）的+/- 1个最低有效位（LSB）来确定实时激励比率斜率。 可以检测由抖动引起的激光输出功率的轻微变化，并用于实时计算激光激发比斜率。 这可以用于选择驱动电流以补偿保持激励比斜率基本恒定的环境变化。

公开(公告)号：US07801442B2

公开(公告)日：2010-09-21

申请号：US11648491

申请日：2006-12-28

申请人： Frank Wang ,  Darren Crews ,  Lee Xu ,  Graham Flower ,  Miaobin Gao ,  Chien-Chang Liu ,  Jesse Chin ,  Brian Kim ,  William Wang ,  Guobin Liu ,  Xiaojie Xu ,  Thiri Lwin ,  Yousheng Wu ,  Simon Lee, II

发明人： Frank Wang ,  Darren Crews ,  Lee Xu ,  Graham Flower ,  Miaobin Gao ,  Chien-Chang Liu ,  Jesse Chin ,  Brian Kim ,  William Wang ,  Guobin Liu ,  Xiaojie Xu ,  Thiri Lwin ,  Yousheng Wu ,  Simon Lee, II

IPC分类号： G02F1/00

CPC分类号： H04B10/40 ,  H04B10/032

摘要： Embodiments introduce redundant optical channels to significantly extend the lifetime of parallel optical transceivers. A plurality of transmitters, N, transmit on a plurality of optical channels, where N is an integer number of optical channels greater than 1. One or more redundant channels, M, are also provided. N+M multiple input shift registers provide multiple paths for signals from each of the transmitters to connect to N+M laser diodes. In the event up to M of the N+M laser diodes fail, the multiple input shift registers connect the N transmitters to functioning ones of the N+M laser diodes thus extending the life of the device. A corresponding scheme is also described for the receiver side.

摘要翻译： 实施例引入冗余光通道以显着延长并行光收发器的寿命。 多个发射机N在多个光信道上发射，其中N是大于1的整数个光信道。还提供了一个或多个冗余信道M。 N + M多输入移位寄存器为来自每个发射器的信号提供多个路径，以连接到N + M个激光二极管。 在N + M个激光二极管的M个失效的情况下，多个输入移位寄存器将N个发射器连接到N + M个激光二极管的功能，从而延长了器件的使用寿命。 还针对接收机侧描述了相应的方案。

公开(公告)号：US07493053B2

公开(公告)日：2009-02-17

申请号：US10954902

申请日：2004-09-30

申请人： Chien-Chang Liu ,  Hengju Cheng

发明人： Chien-Chang Liu ,  Hengju Cheng

IPC分类号： H04B10/12

CPC分类号： H04B10/6932 ,  G06F3/147

摘要： An optical receiver circuit is disclosed. This receiver included in receiver optical sub-assembly (ROSA) adjusts bandwidth based on a voltage level detection at a receiver signal strength indication (RSSI) pin, or rate-adaptively adjusts the bandwidth of optical receiver circuit based on operation data rate.

摘要翻译： 公开了一种光接收机电路。 包括在接收机光子组件（ROSA）中的该接收机基于接收机信号强度指示（RSSI）引脚上的电压电平检测来调整带宽，或者基于操作数据速率速率自适应地调整光接收机电路的带宽。

公开(公告)号：US06903628B2

公开(公告)日：2005-06-07

申请号：US10604408

申请日：2003-07-18

申请人： Chien-Chang Liu

发明人： Chien-Chang Liu

IPC分类号： H03H7/01 ,  H03H7/00

CPC分类号： H03H7/1758 ,  H03H7/0115 ,  H03H2001/0085

摘要： A laminated lowpass filter includes nine dielectric substrates arranged in a stack. The outer surfaces of the stack are ground planes. From top to bottom, top four layers forms a first MIM capacitor, a spiral four-port “mutually coupled coils” (MCCs) structure is placed in the middle, and then the second MIM capacitor is formed on bottom four layers. The first port (P1″) of the MCCs is connected to the first MIM capacitor. The fourth port (P4″) of the MCCs is connected to the second MIM capacitor. The second and third ports (P2″, P3″) constitute input and output of the laminated lowpass filter on the sides of the stack.

摘要翻译： 叠层低通滤波器包括布置在堆叠中的9个电介质基片。 堆叠的外表面是接地平面。 从顶部到底部，顶部四层形成第一MIM电容器，在中间放置螺旋四端口“相互耦合的线圈”（MCC）结构，然后在第四层上形成第二MIM电容器。 MCC的第一端口（P 1“）连接到第一MIM电容器。 MCC的第四端口（P 4“）连接到第二MIM电容器。 第二和第三端口（P 2“，P 3”）构成层叠的低通滤波器在堆叠的侧面上的输入和输出。

公开(公告)号：US20050026647A1

公开(公告)日：2005-02-03

申请号：US10604568

申请日：2003-07-30

申请人： Ko-Mai Li ,  Yo-Shen Lin ,  Chien-Chang Liu

发明人： Ko-Mai Li ,  Yo-Shen Lin ,  Chien-Chang Liu

IPC分类号： H04B1/38 ,  H04B1/44 ,  H04B1/06 ,  H04B1/18

CPC分类号： H04B1/38

摘要： An RF transceiver module for wireless communication devices includes a multi-layered substrate, an RF transceiver IC mounted on the multi-layered substrate for receiving and transmitting voice or data signals, at least one band selection filter mounted on the multi-layered substrate for filtering received RF signals, an antenna switch integrated in the multi-layered substrate which can be switched to transmit RF signals generated by the power amplifiers to the external antenna or to receive RF signals from an external antenna to the RF transceiver IC through the band selection filter, a plurality of passive devices embedded in the multi-layered substrate, and wiring embedded in the multi-layered substrate for electrically connecting the passive devices, the RF transceiver IC, and the band selection filter.

摘要翻译： 用于无线通信设备的RF收发器模块包括多层基板，安装在多层基板上的用于接收和发送语音或数据信号的RF收发器IC，安装在多层基板上的至少一个带选择滤波器，用于滤波 接收的RF信号，集成在多层基板中的天线开关，其可以被切换以将由功率放大器产生的RF信号发送到外部天线，或者通过频带选择滤波器从外部天线接收RF信号到RF收发器IC 嵌入在多层基板中的多个无源器件，以及嵌入在多层基板中的用于电连接无源器件，RF收发器IC和频带选择滤波器的布线。

公开(公告)号：US08890754B2

公开(公告)日：2014-11-18

申请号：US13689784

申请日：2012-11-30

申请人： Yen-Hui Lin ,  Chien-Chang Liu

发明人： Yen-Hui Lin ,  Chien-Chang Liu

IPC分类号： H01Q1/24

CPC分类号： H01Q1/24 ,  H01Q1/243 ,  H01Q5/335 ,  H01Q7/00 ,  H01Q9/42

摘要： An antenna apparatus includes a metal shell, a circuit board parallel to the metal shell which forms a space between the circuit board and the shell, a tunable matching circuit mounted in the space with an terminal electrically connected to the shell, and an capacitive feed coupling antenna mounted on the circuit board. The capacitive feed coupling antenna includes a coupling ground strip mounted on the circuit board and a feed strip. The feed strip includes a first portion and a second portion mounted on the circuit board with a portion extending along an edge of the circuit board. The first portion is electrically interconnected between the other terminal of the tunable matching circuit and the second portion.

摘要翻译： 天线装置包括金属外壳，平行于金属外壳的电路板，其在电路板和外壳之间形成空间;可调谐匹配电路，安装在具有电连接到外壳的端子的空间中，以及电容馈电耦合 天线安装在电路板上。 电容馈电耦合天线包括安装在电路板上的耦合接地条和馈电条。 所述进给条包括安装在所述电路板上的第一部分和第二部分，所述第一部分和所述第二部分具有沿所述电路板的边缘延伸的部分。 第一部分电连接在可调谐匹配电路的另一个端子和第二部分之间。

公开(公告)号：US08330657B2

公开(公告)日：2012-12-11

申请号：US12627056

申请日：2009-11-30

申请人： Chien-Chang Liu

发明人： Chien-Chang Liu

IPC分类号： H01Q1/24

CPC分类号： H01Q9/145 ,  H01Q5/342 ,  H01Q9/42

摘要： A portable wireless communication device includes a base circuit board, an antenna, and a switch. The base circuit board is a printed circuit board including a feed point and a ground point. The antenna is disposed on the base circuit board including a radiating portion, a feed portion, and a plurality of ground portions. The feed portion electrically connected to the feed point. The switch is electrically connected between the ground point and the plurality of ground portions to choose one ground portion to electrically connect to the ground point and obtain wide working frequency bands.

摘要翻译： 便携式无线通信设备包括基本电路板，天线和开关。 基底电路板是包括馈电点和接地点的印刷电路板。 天线设置在基板电路板上，包括辐射部分，馈电部分和多个接地部分。 馈电部分电连接到馈电点。 开关电连接在接地点和多个接地部分之间，以选择一个接地部分来电连接到接地点并获得宽的工作频带。