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    • 3. 发明专利
    • Phase difference detection circuit, phase difference detecting method, optical disk device, and method of controlling optical disk drive
    • 相位差检测电路,相位差检测方法,光盘装置和控制光盘驱动器的方法
    • JP2006164425A
    • 2006-06-22
    • JP2004355730
    • 2004-12-08
    • Nec Electronics CorpNecエレクトロニクス株式会社
    • KOBAYASHI KENJI
    • G11B20/14G11B7/005G11B20/10
    • G11B20/10222G11B20/10009G11B20/1403H03D13/00
    • PROBLEM TO BE SOLVED: To provide a phase difference detection circuit for detecting relative jitter by detecting both edge positions of input data and an input clock.
      SOLUTION: A phase difference detection circuit is a phase difference detection circuit for detecting a phase difference between the input data and the input clock, and the circuit is equipped with; an input data edge position detecting part detecting an edge position of the input data based on an N-phase clock obtained by dividing a predetermined period into N areas (N is an integer of 2 or more); an input clock edge position detecting part detecting an edge position of the input clock based on the N-phase clock; and a phase difference detecting part detecting the phase difference between the input data and the input clock based on the edge position of the input data and the edge position of the input clock. Since the circuit detects both edge positions of the input data and the input clock by such a constitution, the circuit becomes possible to consider both jitter and the circuit becomes possible to detect the relative jitter.
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供一种通过检测输入数据和输入时钟的两个边缘位置来检测相对抖动的相位差检测电路。 解决方案:相位差检测电路是用于检测输入数据和输入时钟之间的相位差的相位差检测电路,并且电路配备有; 输入数据边缘位置检测部分,基于通过将预定周期划分为N个区域(N为2以上的整数)而获得的N相时钟来检测输入数据的边缘位置; 输入时钟边沿位置检测部分,基于所述N相时钟检测所述输入时钟的边沿位置; 以及相位差检测部,其基于输入数据的边缘位置和输入时钟的边缘位置来检测输入数据和输入时钟之间的相位差。 由于该电路通过这种结构检测输入数据和输入时钟的两个边缘位置,所以可以考虑电路抖动,并且电路可以检测相对抖动。 版权所有(C)2006,JPO&NCIPI
    • 4. 发明专利
    • Phase comparator and semiconductor device having phase comparator
    • 具有相位比较器的相位比较器和半导体器件
    • JP2006135758A
    • 2006-05-25
    • JP2004323766
    • 2004-11-08
    • Fujitsu Ltd富士通株式会社
    • YAMANAKA HIROAKI
    • H03K5/26H03L7/085
    • H03D13/00
    • PROBLEM TO BE SOLVED: To improve the detection accuracy of phase difference of a phase comparator. SOLUTION: A phase difference signal generation circuit 24 outputs to a control terminal of a tri-state buffer 12 a signal C_SIGNAL to be a period high level corresponding to phase difference between a comparison target signal COMP1 and a comparison target signal COMP2 from a signal synchronized with a rise of the comparison target signal COMP1 detected by an edge detection flag generation circuit 22 and a signal synchronized with a rise of the comparison target signal COMP2 detected by an edge detection flag generation circuit 23. A status management circuit 25 outputs to an input terminal of the tri-state buffer 12 a signal A_SIGNAL corresponding to a phase lead or lag of the comparison target signal COMP1 and the comparison target signal COMP2. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提高相位比较器的相位差的检测精度。 解决方案:相位差信号产生电路24将信号C_SIGNAL的三态缓冲器12的控制端输出为对应于比较目标信号COMP1和比较目标信号COMP2之间的相位差的周期高电平, 与由边缘检测标志产生电路22检测的比较目标信号COMP1的上升同步的信号和由边沿检测标志产生电路23检测到的比较目标信号COMP2的上升同步的信号。状态管理电路25输出 向三态缓冲器12的输入端子提供与比较目标信号COMP1和比较目标信号COMP2的相位超前或滞后相对应的信号A_SIGNAL。 版权所有(C)2006,JPO&NCIPI
    • 8. 发明专利
    • Phase detection circuit and pll circuit
    • 相位检测电路和PLL电路
    • JP2011166232A
    • 2011-08-25
    • JP2010023474
    • 2010-02-04
    • Toshiba Corp株式会社東芝
    • SUZUKI ATSUSHI
    • H03L7/085H03K5/26
    • H03D13/00H03L7/06
    • PROBLEM TO BE SOLVED: To provide a phase detection circuit which reduces the lag of two pulse signals generated based on a phase comparison of two clock signals as much as possible, and is reliably reset, and a PLL circuit having the phase detection circuit. SOLUTION: A phase detection circuit includes a latch circuit that selects a preparation operation state before phase comparison or a circuit operation state after the phase comparison, to hold one of outputs used for generation of two pulse signals on an advance phase side and a delay phase side, based on an OR signal and an AND signal of two clock signals to be subjected to phase comparison. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供一种相位检测电路,其能够尽可能地减少基于两个时钟信号的相位比较而产生的两个脉冲信号的滞后,并且被可靠地复位,并且具有相位检测的PLL电路 电路。 相位检测电路包括:锁存电路,其在相位比较之前选择准备操作状态或相位比较之后的电路操作状态,以保持用于在提前相位侧产生两个脉冲信号的输出之一,以及 延迟相位侧,基于要进行相位比较的两个时钟信号的或信号和“与”信号。 版权所有(C)2011,JPO&INPIT