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    • 6. 发明专利
    • Adaptive bandwidth phase locked loop with feedforward divider
    • 自适应带宽相位锁定环路带有前置分路器
    • JP2008148346A
    • 2008-06-26
    • JP2007341739
    • 2007-12-11
    • Silicon Image Incシリコン イメージ,インコーポレイテッド
    • KIM JAEHAJEONG DEOG-KYOON
    • H03L7/22H03L7/10
    • H03L7/23H03L7/0895H03L7/093H03L7/0995
    • PROBLEM TO BE SOLVED: To solve the problem of the reduction in a ring VCO frequency range, while the usable range of a VCO control voltage has shrunk considerably as a supply voltage has scaled below 1.2 V (volts) and a PLL application space continues to expand, demanding even wider frequency range from a single PLL.
      SOLUTION: A chip includes first and second sub phase lock loops (sub-PLLs) including first and second voltage controlled oscillators (VCOs) to provide first and second VCO output signals, and first and second feedforward divider circuits to divide first and second frequencies of the first and second VCO output signals by first and second frequency division rates. The chip also includes phase locked loop control circuitry to select the first and second frequency division rates.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:为了解决环形VCO频率范围的减小的问题,当VCO控制电压的可用范围随着电源电压已经低于1.2V(伏特)而减小,并且PLL应用 空间不断扩大,从单个PLL要求甚至更宽的频率范围。 解决方案:芯片包括包括第一和第二压控振荡器(VCO)的第一和第二子锁相环(子PLL),以提供第一和第二VCO输出信号;以及第一和第二前馈分频器电路,用于将第一和第二压控振荡器 通过第一和第二分频率,第一和第二VCO输出信号的第二频率。 该芯片还包括用于选择第一和第二分频率的锁相环控制电路。 版权所有(C)2008,JPO&INPIT
    • 10. 发明申请
    • SYSTEM AND METHOD FOR DRIVING COLUMNS OF AN ACTIVE MATRIX DISPLAY
    • 用于驱动活动矩阵显示的柱的系统和方法
    • WO9840873A2
    • 1998-09-17
    • PCT/US9804767
    • 1998-03-10
    • SILICON IMAGE INC
    • JEONG DEOG-KYOONKIM GYUDONGSONG HO YOUNGLEE DAVID D
    • G02F1/133G09G3/20G09G3/36
    • G09G3/2011G09G3/3688G09G3/3696G09G2310/027
    • Described is a system and method for driving columns of an active matrix display using a resistor-string digital-to-analog converter (DAC). The description includes an auto-stop buffer circuit that drives an analog data voltage in two steps; the first step being active buffering by a "dead-zone amplifier" before the output reaches a certain level and the second step being acting as a passive conduit after the output reaches the certain level. The dead-zone amplifier inherently turns itself off when the analog voltage reaches the certain level. Also described are various column driver architectures in which buffers are placed in various ways in a column driver in between the resistor-string DAC and the column decoders in order to minimize the number of required buffers.
    • 描述了一种使用电阻串数模转换器(DAC)驱动有源矩阵显示器列的系统和方法。 该描述包括以两步驱动模拟数据电压的自动停止缓冲电路; 第一步是在输出达到一定水平之前由“死区放大器”进行主动缓冲,第二步在输出达到一定水平之后作为无源导管。 当模拟电压达到一定水平时,死区放大器本身就会自动关闭。 还描述了各种列驱动器架构,其中缓冲器以各种方式放置在电阻器串DAC和列解码器之间的列驱动器中,以便使所需缓冲器的数量最小化。