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    • 2. 发明授权
    • Electro-optic modulator with improved harmonic performance
    • 具有改善谐波性能的电光调制器
    • US06204951B1
    • 2001-03-20
    • US09082620
    • 1998-05-19
    • James F. CowardTing K. YeePeter ChangAbraham Kou
    • James F. CowardTing K. YeePeter ChangAbraham Kou
    • G02F103
    • G02F1/225G02F1/2255G02F2203/19
    • An electro-optic modulator includes a splitting section, at least three transmission legs, an RF phase-shifting section, a DC-phase shifting section, and a combining section. The splitting section splits a received optical signal into sub-signals, one for each transmission leg. The RF phase-shifting section phase shifts at least two of the sub-signals by an amount proportional to a received RF signal; while the DC phase-shifting section phase shifts at least two of the sub-signals by a DC phase. The combining section combines the phase-shifted sub-signals into a modulated optical signal. In a preferred embodiment, the modulator is characterized by design parameters, such as splitting ratio, DC phase shift, RF coupling efficiency, and combining ratio, and these design parameters are selected to ensure that the modulator meets predetermined performance characteristics, such as maximum harmonic levels or minimum signal to noise ratios.
    • 电光调制器包括分离部分,至少三个传输腿,RF相移部分,DC相移部分和组合部分。 分离部分将接收到的光信号分成子信号,每个传输分支一个。 RF相移部分将至少两个子信号相移一个与所接收的RF信号成比例的量; 而直流相移部分通过DC相位将至少两个子信号相移。 组合部分将相移的子信号组合成调制的光信号。 在优选实施例中,调制器的特征在于设计参数,例如分频比,DC相移,RF耦合效率和组合比,并且选择这些设计参数以确保调制器满足预定的性能特性,例如最大谐波 电平或最小信噪比。
    • 6. 发明授权
    • Modularly configurable memory system for LCD TV system
    • 用于液晶电视系统的模块化可配置存储系统
    • US07515158B2
    • 2009-04-07
    • US11158872
    • 2005-06-22
    • Peter ChangKuan Fu Chen
    • Peter ChangKuan Fu Chen
    • G06T1/60
    • H04N21/44004G09G5/001G09G5/39G09G2360/12H04N19/423H04N21/42692H04N21/443
    • A configurable memory system provides a high bandwidth, low latency, no wait state data path to a memory system functioning as a frame buffer for a digital video processing system. The configurable memory system has configurable channels that are programmable to control the access pattern of the memory controller. Once the configurable channels are programmed, the memory controller can generate the necessary address, timing, and control signals for selectively writing the data to and reading the data from the selected blocks of the array of memory devices continuously access the memory and move the data to the channel buffers. The channel buffer receives, retains, and transfers a defined segment of the data as defined by the segment pattern between the processing system and the array of memory devices, such that the processing system is able to transfer and receive the data continuously according to data requirements of the processing system.
    • 可配置的存储器系统提供高带宽,低等待时间,无等待状态数据路径到用作数字视频处理系统的帧缓冲器的存储器系统。 可配置存储器系统具有可编程的可配置通道,以控制存储器控制器的访问模式。 一旦可配置的通道被编程,存储器控制器可以产生必要的地址,定时和控制信号,用于选择性地将数据写入存储器件阵列的所选块并从其中读取数据,并持续访问存储器并将数据移动到 通道缓冲区。 信道缓冲器接收,保留和传送由处理系统和存储器件阵列之间的段模式定义的数据的定义段,使得处理系统能够根据数据要求连续地传送和接收数据 的处理系统。