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21. 发明申请

US20140009316A1 Complementary Switched Capacitor Amplifier for Pipelined ADCs and Other Applications 有权
标题翻译：用于流水线ADC和其他应用的互补开关电容放大器
公开(公告)号：US20140009316A1
公开(公告)日：2014-01-09
申请号：US13543386
申请日：2012-07-06
申请人： Wei-Te Chou , Jiangfeng Wu , Wenbo Liu
发明人： Wei-Te Chou , Jiangfeng Wu , Wenbo Liu
IPC分类号： H03F3/26 , H03M1/02
CPC分类号： H03F3/005 , H03F3/265 , H03F3/3001 , H03F3/45179 , H03F2203/45551 , H03M1/164
摘要： The present disclosure is directed to a switched capacitor amplifier that includes a switched capacitor network and a complementary push-pull amplifier. The switched capacitor amplifier of the present disclosure can provide a larger fraction of the charge provided by a power supply and flowing through the amplifier to a capacitive load at the output of the amplifier compared to switched capacitor amplifiers that use single-ended class-A amplifiers. The switched capacitor amplifier of the present disclosure can be used in a converter stage of a pipelined analog-to-digital converter (ADC) to improve the ADC's power efficiency and/or bandwidth. It can be further generalized to be used in other applications other than pipelined ADCs.
摘要翻译：本公开涉及一种包括开关电容器网络和互补推挽放大器的开关电容放大器。与使用单端A类放大器的开关电容放大器相比，本公开的开关电容放大器可以提供由电源提供并且在放大器的输出处流过放大器的电容性负载的较大部分电荷，。本公开的开关电容放大器可用于流水线模数转换器（ADC）的转换器级，以提高ADC的功率效率和/或带宽。可以进一步推广使用流水线ADC以外的其他应用。

22. 发明申请

US20120014420A1 Method and Apparatus for Fast Link Recovery 有权
标题翻译：快速链路恢复的方法和装置
公开(公告)号：US20120014420A1
公开(公告)日：2012-01-19
申请号：US12857080
申请日：2010-08-16
申请人： Jiangfeng Wu , Jose Tellado , John Dring , Nima Ferdosi
发明人： Jiangfeng Wu , Jose Tellado , John Dring , Nima Ferdosi
IPC分类号： H04L5/16 , H04B17/00
CPC分类号： H04L25/03343 , H04L1/0014 , H04L1/0025 , H04L1/004 , H04L2025/03802
摘要： Embodiments of methods and apparatus for fast link recover are disclosed. One method includes sensing a link quality failure of a link between a receiver and a transmitter. If a link quality failure is sensed, then the receiver selects new pre-coder settings for the transmitter. The receiver communicates the new pre-coder settings to the transmitter. The transmitter applies the new pre-coder settings. The receiver computes its equalizer settings based on the new pre-coder settings of the transmitter. One apparatus or transceiver includes a means for determining a link quality failure of a link between the transceiver and a link partner transceiver. The transceiver selects new pre-coder settings for the link partner transceiver if a link quality failure is sensed. Additionally, the transceiver communicates the new pre-coder settings to the link partner transceiver, and computes its equalizer settings based on the new pre-coder settings of the link partner transceiver.
摘要翻译：公开了用于快速链路恢复的方法和装置的实施例。一种方法包括感测接收机和发射机之间的链路的链路质量故障。如果感测到链路质量故障，则接收机为发射机选择新的预编码器设置。接收机将新的预编码器设置传送给发射机。发射机应用新的预编码器设置。接收机根据发射机的新的预编码器设置计算其均衡器设置。一种装置或收发器包括用于确定收发器和链路伙伴收发器之间的链路的链路质量故障的装置。如果感测到链路质量故障，收发器将为链路伙伴收发器选择新的预编码器设置。此外，收发器将新的预编码器设置传送到链路伙伴收发器，并且基于链路伙伴收发器的新的预编码器设置来计算其均衡器设置。

23. 发明授权

US08009824B2 Line driver with active termination 有权
标题翻译：线路驱动器，主动终端
公开(公告)号：US08009824B2
公开(公告)日：2011-08-30
申请号：US11590202
申请日：2006-10-30
申请人： Jiangfeng Wu , Tianwei Li , Arnoldus Venes
发明人： Jiangfeng Wu , Tianwei Li , Arnoldus Venes
IPC分类号： H04M1/00
CPC分类号： H04M11/062 , H04L25/028 , H04L25/0298
摘要： A line driver comprises a driving amplifier receiving an input of the line driver, a current sense resistor connected between the driving amplifier output and the line driver output, and a feedback amplifier sensing the voltage across the current sense resistor and providing a corresponding feedback voltage that is proportional to the output current to the driving amplifier, thereby determining an output impedance at the line driver output. Precise output impedance can be realized by using a high precision resistor as the current sense resistor, and using resistive feedback amplifiers with accurate gains as the driving and feedback amplifiers. The resistance of the current sense resistor can be substantially less than the line driver output impedance, and the driving amplifier output voltage swing can be substantially less than twice the line driver output voltage swing.
摘要翻译：线路驱动器包括接收线路驱动器的输入的驱动放大器，连接在驱动放大器输出和线路驱动器输出之间的电流检测电阻器，以及感测电流检测电阻器两端的电压的反馈放大器，并提供相应的反馈电压，与驱动放大器的输出电流成比例，从而确定线路驱动器输出端的输出阻抗。可以通过使用高精度电阻器作为电流检测电阻器，并使用具有精确增益的电阻反馈放大器作为驱动和反馈放大器来实现精确的输出阻抗。电流检测电阻器的电阻可以显着小于线路驱动器输出阻抗，并且驱动放大器输出电压摆幅可以显着小于线路驱动器输出电压摆幅的两倍。

24. 发明授权

US07583179B2 Multi-protocol radio frequency identification transceiver 有权
标题翻译：多协议射频识别阅读器收发器
公开(公告)号：US07583179B2
公开(公告)日：2009-09-01
申请号：US11154231
申请日：2005-06-16
申请人： Jiangfeng Wu , Donald Edward Major
发明人： Jiangfeng Wu , Donald Edward Major
IPC分类号： H04Q5/22
CPC分类号： G06K7/0008 , H04B1/30 , H04B1/408
摘要： A transceiver for a RFID reader and a transceiver for a RFID transponder (tag) allow communication between the two devices. The RFID reader utilizes an analog front end and a digital backend. In the receiver portion of the transceiver, the front end of the RFID reader uses a pair of down-conversion mixers to demodulate a received signal into in-phase (I) and quadrature (Q) components and analog-to-digital converters (ADC) digitize the signal. A digital signal processor (DSP) in the back end processes the digital signal and uses a matched filter for data detection. The RFID tag receives an inductively coupled signal from the reader and the receiver portion of the tag uses a pulse/level detector that employs an analog comparator and a sample and hold circuit to detect the received signal. A digital decoder/controller is used to decode the incoming data and to establish a sampling clock for the pulse/level detector. An automatic gain control (AGC) circuit adjusts a receiver gain according to the received signal strength and controls tuning of magnetic coupling circuitry.
摘要翻译：用于RFID读取器的收发器和用于RFID应答器（标签）的收发器允许两个设备之间的通信。 RFID阅读器使用模拟前端和数字后端。在收发器的接收器部分中，RFID读取器的前端使用一对下变频混频器将接收的信号解调为同相（I）和正交（Q）分量和模数转换器（ADC））数字化信号。后端的数字信号处理器（DSP）处理数字信号，并使用匹配滤波器进行数据检测。 RFID标签从读取器接收电感耦合信号，并且标签的接收器部分使用采用模拟比较器和采样和保持电路来检测接收信号的脉冲/电平检测器。数字解码器/控制器用于对输入数据进行解码并建立脉冲/电平检测器的采样时钟。自动增益控制（AGC）电路根据接收到的信号强度调整接收机增益，并控制磁耦合电路的调谐。

25. 发明申请

US20090115384A1 Distributed Power Management 审中-公开
标题翻译：分布式电源管理
公开(公告)号：US20090115384A1
公开(公告)日：2009-05-07
申请号：US12260866
申请日：2008-10-29
申请人： Ardie VENES , Tianwei Li , Jiangfeng Wu , Pieter Vorenkamp
发明人： Ardie VENES , Tianwei Li , Jiangfeng Wu , Pieter Vorenkamp
IPC分类号： G05F1/00
CPC分类号： H02M3/158 , H02M3/33561 , H02M3/33569 , H02M2001/0045 , H02M2001/007
摘要： Apparatuses, methods, and systems for effective power management distribution are provided. In an embodiment, a system for providing power to a circuit block comprises a power management unit (PMU) configured on a first substrate and an integrated circuit (IC) configured on a second substrate. The PMU includes a first regulator configured to step down an input voltage and output a first regulated voltage. The IC includes the circuit block and a second regulator configured to receive the first regulated voltage and output a second regulated voltage. The second power regulated voltage provides power to the circuit block. The first regulator is more efficient than the second regulator.
摘要翻译：提供了有效的电源管理分配的设备，方法和系统。在一个实施例中，用于向电路块供电的系统包括配置在第一基板上的电源管理单元（PMU）和配置在第二基板上的集成电路（IC）。 PMU包括配置成降低输入电压并输出第一调节电压的第一调节器。 IC包括电路块和被配置为接收第一调节电压并输出第二调节电压的第二调节器。第二个电源调节电压为电路块提供电源。第一个调节器比第二个调节器更有效率。

26. 发明申请

US20060238301A1 Multi-protocol radio frequency identification transponder tranceiver 有权
标题翻译：多协议射频识别应答器收发器
公开(公告)号：US20060238301A1
公开(公告)日：2006-10-26
申请号：US11154383
申请日：2005-06-16
申请人： Jiangfeng Wu , Donald Major
发明人： Jiangfeng Wu , Donald Major
IPC分类号： H04Q5/22
CPC分类号： G06K7/0008
摘要： A transceiver for a RFID reader and a transceiver for a RFID transponder (tag) allow communication between the two devices. The RFID reader utilizes an analog front end and a digital backend. In the receiver portion of the transceiver, the front end of the RFID reader uses a pair of down-conversion mixers to demodulate a received signal into in-phase (I) and quadrature (Q) components and analog-to-digital converters (ADC) digitize the signal. A digital signal processor (DSP) in the back end processes the digital signal and uses a matched filter for data detection. The RFID tag receives an inductively coupled signal from the reader and the receiver portion of the tag uses a pulse/level detector that employs an analog comparator and a sample and hold circuit to detect the received signal. A digital decoder/controller is used to decode the incoming data and to establish a sampling clock for the pulse/level detector. An automatic gain control (AGC) circuit adjusts a receiver gain according to the received signal strength and controls tuning of magnetic coupling circuitry.
摘要翻译：用于RFID读取器的收发器和用于RFID应答器（标签）的收发器允许两个设备之间的通信。 RFID阅读器使用模拟前端和数字后端。在收发器的接收器部分中，RFID读取器的前端使用一对下变频混频器将接收的信号解调为同相（I）和正交（Q）分量和模数转换器（ADC））数字化信号。后端的数字信号处理器（DSP）处理数字信号，并使用匹配滤波器进行数据检测。 RFID标签从读取器接收电感耦合信号，并且标签的接收器部分使用采用模拟比较器和采样和保持电路来检测接收信号的脉冲/电平检测器。数字解码器/控制器用于对输入数据进行解码并建立脉冲/电平检测器的采样时钟。自动增益控制（AGC）电路根据接收到的信号强度调整接收机增益，并控制磁耦合电路的调谐。

27. 发明授权

US07016649B1 Space-time and space-frequency hopping for capacity enhancement of mobile data systems 有权
标题翻译：移动数据系统容量增强的时空和空跳跳频
公开(公告)号：US07016649B1
公开(公告)日：2006-03-21
申请号：US09803718
申请日：2001-03-09
申请人： Ravi Narasimhan , Piu Bill Wong , Shimon B. Scherzer , Jiangfeng Wu
发明人： Ravi Narasimhan , Piu Bill Wong , Shimon B. Scherzer , Jiangfeng Wu
IPC分类号： H04Q7/20
CPC分类号： H01Q25/00 , H01Q1/246 , H04B7/0695 , H04W52/34
摘要： The present invention utilizes adaptive antenna arrays at a base station to increase the forward link capacity of mobile data systems. One or more simultaneous forward link beams are formed and are switched (or hopped) in a time division manner among subscribers. The beam hopping sequence is randomized by varying the time slot and/or carrier frequency of each subscriber. In space-time hopping, the position within a frame of the time slot for each subscriber is varied in a pseudo random sequence. In space-frequency hopping, the carrier frequency for each frame is varied in a pseudo random sequence. The pseudo random beam hopping sequence provides a gain due to interference diversity in addition to the antenna array gain. Forward link beam forming algorithms use space-time or space-frequency hopping to increase the capacity of mobile data systems.
摘要翻译：本发明在基站利用自适应天线阵列来增加移动数据系统的前向链路容量。一个或多个同时的前向链路波束被形成并且在用户之间以时分方式被切换（或跳转）。波束跳频序列通过改变每个用户的时隙和/或载波频率来随机化。在空时跳频中，每个用户的时隙的帧内的位置以伪随机序列变化。在空时跳频中，每个帧的载波频率以伪随机序列变化。除了天线阵列增益之外，伪随机波束跳变序列还提供了由于干扰分集引起的增益。前向链路波束形成算法使用时空或空跳跳频来增加移动数据系统的容量。

28. 发明授权

US06697644B2 Wireless link quality using location based learning 有权
标题翻译：无线链路质量使用基于位置的学习
公开(公告)号：US06697644B2
公开(公告)日：2004-02-24
申请号：US09777613
申请日：2001-02-06
申请人： Shimon B. Scherzer , Piu Bill Wong , Jiangfeng Wu , Alexander V. Tesler
发明人： Shimon B. Scherzer , Piu Bill Wong , Jiangfeng Wu , Alexander V. Tesler
IPC分类号： H04B138
CPC分类号： H04W16/28 , H04W24/02
摘要： The invention provides optimization of communication links by using a control loop with a relatively long time constant and adjusting particular communication links based upon feedback from a virtual communication unit associated with a communication link. A preferred embodiment of the invention optimizes wireless links in a point to multipoint system, such as a cellular communication system, by dividing a service area into segments and adjusting an antenna beam associated with a segment when a mobile unit is operable therein. This preferred embodiment results in convergence upon an optimized communication link over time and is suitable for use even with highly mobile systems. Preferred embodiments of the invention provide control loops for location or segment optimization as well as for individual optimization.
摘要翻译：本发明通过使用具有相对长的时间常数的控制回路来提供通信链路的优化，并且基于来自与通信链路相关联的虚拟通信单元的反馈来调整特定的通信链路。本发明的优选实施例通过将服务区域划分成多个段来调整点对多点系统（诸如蜂窝通信系统）中的无线链路，并且当移动单元可操作时调整与段相关联的天线波束。该优选实施例导致随着时间推移优化的通信链路的收敛，并且甚至适用于高度移动的系统。本发明的优选实施例提供用于位置或段优化以及单独优化的控制回路。

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