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    • 91. 发明申请
    • TIMING GENERATOR AND SEMICONDUCTOR TESTING APPARATUS
    • 定时发生器和半导体测试装置
    • US20090132884A1
    • 2009-05-21
    • US11570042
    • 2005-06-06
    • Masakatsu SudaMasahiro IshidaDaisuke Watanabe
    • Masakatsu SudaMasahiro IshidaDaisuke Watanabe
    • G01R31/28H03L7/00G06F11/00
    • G01R31/31709G01R31/31922
    • A timing generator that needs no analog circuit for adding jitters and allows the circuit scale and power consumption to be reduced. There are included a counter for performing a counting operation synchronized with a reference clock signal: a timing memory for outputting respective data corresponding to the quotient and remainder resulting from dividing the time from the front of a basic period until a generation of a timing edge by the period of the reference clock signal: a coincidence detecting circuit for outputting a signal that exhibits a high level when the count value of the counter coincides with the quotient: a jitter generating circuit for outputting as a jitter amplitude value: adders for adding a time corresponding to the remainder and a time represented by the jitter amplitude value outputted from the jitter generating circuit: and a variable delay circuit for delaying the output signal from the coincidence detecting circuit by the time represented by the addition result of the adders and outputting the delayed output signal.
    • 定时发生器不需要模拟电路来加入抖动,并且可以减小电路规模和功耗。 包括用于执行与参考时钟信号同步的计数操作的计数器:定时存储器,用于输出与商相对应的各个数据,以及由从基本周期的前方划分到时间边缘的产生之前的时间, 参考时钟信号的周期:当计数器的计数值与商相符时,输出呈现高电平的信号的一致检测电路:用于输出抖动振幅值的抖动发生电路:用于添加时间的加法器 对应于剩余时间和由抖动发生电路输出的抖动振幅值表示的时间;以及可变延迟电路,用于将来自符合检测电路的输出信号延迟由加法器的相加结果表示的时间,并输出延迟 输出信号。
    • 93. 发明申请
    • IMAGE FORMING APPARATUS
    • 图像形成装置
    • US20080089713A1
    • 2008-04-17
    • US11871410
    • 2007-10-12
    • Masahiro IshidaKazuki SuzukiTetsuji NishikawaYasuhiro MaehataTakayuki NiiharaMakoto Kikura
    • Masahiro IshidaKazuki SuzukiTetsuji NishikawaYasuhiro MaehataTakayuki NiiharaMakoto Kikura
    • G03G15/00
    • G03G15/757G03G15/0194G03G2215/0129
    • An image forming apparatus includes a plurality of image carriers, a drive mechanism, a plurality of drive force transmission gears, a phase difference detector, and a shift unit. The plurality of image carriers forms images of separate colors. The drive mechanism including a single drive unit for driving the plurality of image carriers simultaneously. The plurality of drive force transmission gears, provided for each of the image carriers, transmits a driving force from the drive unit to the image carriers. The phase difference detector detects a phase difference in drive speed among the image carriers. The shift unit, provided for each of the plurality of drive force transmission gears, meshes or unmeshes the drive force transmission gear to the drive mechanism. The shift unit is activated to correct any phase difference in drive speed of the image carriers based on a detection result detected with the phase difference detector.
    • 图像形成装置包括多个图像载体,驱动机构,多个驱动力传递齿轮,相位差检测器和移位单元。 多个图像载体形成单独颜色的图像。 驱动机构包括用于同时驱动多个图像载体的单个驱动单元。 为每个图像载体设置的多个驱动力传递齿轮将驱动力从驱动单元传递到图像载体。 相位差检测器检测图像载体之间的驱动速度的相位差。 为多个驱动力传递齿轮中的每一个设置的换档单元将驱动力传动齿轮啮合或不啮合到驱动机构。 基于用相位差检测器检测的检测结果,移位单元被激活以校正图像载体的驱动速度的任何相位差。
    • 97. 发明授权
    • Generating test patterns used in testing semiconductor integrated circuit
    • 生成用于测试半导体集成电路的测试图案
    • US07254764B2
    • 2007-08-07
    • US11238821
    • 2005-09-28
    • Masahiro IshidaTakahiro Yamaguchi
    • Masahiro IshidaTakahiro Yamaguchi
    • G01R31/28G06F11/00
    • G01R31/2882G01R31/31813G01R31/3183G01R31/318328G01R31/31917G06F11/263
    • Selected test pattern sequences to be used in transient power supply current testing to detect path delay faults in an IC are easily and rapidly generated. A stored fault list of path delay faults is prepared. A train of transition signal values is calculated by simulation of transitions occurring in the IC when a test pattern sequence is applied to the IC, and respective path delay fault in the stored fault list is determined whether it is a detectable fault that is capable of being detected by the transient power supply current testing by using the transition signal values. Those detectable faults that exist in the stored fault list are deleted from the stored fault list and those test pattern sequences that are used to detect the detectable faults existing in the stored fault list are registered in a test pattern sequence list as the selected test pattern sequence.
    • 用于瞬态电源电流测试中用于检测IC中的路径延迟故障的所选测试图案序列容易且快速地产生。 准备存储路径延迟故障的故障列表。 当测试图案序列施加到IC时,通过模拟IC中发生的转换来计算转移信号值串,并且确定存储的故障列表中的各个路径延迟故障是否是可检测的故障,其可以是 通过使用过渡信号值的瞬态电源电流测试来检测。 存储的故障列表中存在的可检测故障从存储的故障列表中删除,并且用于检测存在故障列表中存在的可检测故障的那些测试模式序列作为所选择的测试模式序列被登记在测试模式序列表中 。