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    • 1. 发明公开
    • 소인 및 고정 주파수 시스템을 위한 광역 트래킹 범위,자동 범위설정, 저지터 위상 록 루프
    • 宽跟踪范围,自动范围,低抖动相位锁定用于切换和固定频率系统
    • KR1020020029621A
    • 2002-04-19
    • KR1020010062835
    • 2001-10-12
    • 브룩하벤 싸이언스 어쏘씨에이츠 엘엘씨
    • 커너토마스엠.
    • H03L7/08
    • H03L7/14H03L7/087H03L7/113H03L2207/14
    • PURPOSE: A wide tracking range PLL(Phase Locked Loop) circuit is provided to achieve minimal jitter in a recovered clock signal, regardless of the source of the jitter. CONSTITUTION: The PLL circuit(20) comprises automatic harmonic lockout detection circuitry via a novel lock and seek control logic(33) in electrical communication with a programmable frequency discriminator(35) and a code balance detector(36). In addition, the combination of a differential loop integrator(57) with the lock and seek control logic(33) obviates a code preamble and guarantees signal acquisition without harmonic lockup. An adaptive cable equalizer(31) is desirably used in combination with the PLL to recover encoded transmissions containing a clock and/or data. The equalizer(31) automatically adapts to equalize short haul cable lengths of coaxial and twisted pair cables or wires and provides superior jitter performance. The combination of the equalizer(31) with the PLL is desirable in that such combination permits the use of short haul wires without significant jitter.
    • 目的:提供宽跟踪范围PLL(锁相环)电路,以便在恢复的时钟信号中实现最小的抖动,而不管抖动的来源如何。 构成:PLL电路(20)通过与可编程鉴频器(35)和码平衡检测器(36)进行电通信的新型锁定和寻道控制逻辑(33),包括自动谐波闭锁检测电路。 此外,差分环路积分器(57)与锁定和寻道控制逻辑(33)的组合消除了码头,并且保证信号采集而不需要谐波锁定。 理想地,与PLL组合使用自适应电缆均衡器(31)以恢复包含时钟和/或数据的编码传输。 均衡器(31)自动适应均衡同轴和双绞线电缆或电线的短距离电缆长度,并提供卓越的抖动性能。 均衡器(31)与PLL的组合是期望的,因为这种组合允许使用短距离导线而没有显着的抖动。
    • 6. 发明公开
    • 다 위상 클럭신호 발생을 위한 발진기가 배제된 지연 동기루프
    • 延迟锁定环路用于产生无电压控制的振荡器实现多相时钟并能够输出多相时钟稳定
    • KR1020050011586A
    • 2005-01-29
    • KR1020030050746
    • 2003-07-23
    • 주식회사 한컴지엠디
    • 김광오
    • H03L7/08
    • H03L7/0891H03L7/0812H03L2207/14
    • PURPOSE: A delay locked loop for generating multi-phase clocks without a voltage-controlled oscillator is provided to output the multi-phase clocks stably by preventing the multi-phase clock to be synchronized with harmonics of an input clock signal frequency. CONSTITUTION: A delay locked loop for generating multi-phase clocks includes a clock delay member, a phase detector, a charge pump(40), and a voltage-current converter(6). The clock delay member includes a plurality of delay members which sequentially delay an input clock signal to output the multi-phase clock signals. The phase detector detects a phase difference between the input clock signal and the output clock signals of the clock delay member to adjust a delay amount of the clock delay member. The delay locked loop further includes a clock position detector(20) which detects a delay position of the clock signal outputted from the clock delay member and outputs another control signal to adjust the delay amount of the clock delay member.
    • 目的:提供用于产生没有压控振荡器的多相时钟的延迟锁定环,以通过防止多相时钟与输入时钟信号频率的谐波同步来稳定地输出多相时钟。 构成:用于产生多相时钟的延迟锁定环包括时钟延迟部件,相位检测器,电荷泵(40)和电压 - 电流转换器(6)。 时钟延迟构件包括多个延迟构件,其顺序地延迟输入时钟信号以输出多相时钟信号。 相位检测器检测输入时钟信号和时钟延迟部件的输出时钟信号之间的相位差,以调整时钟延迟部件的延迟量。 延迟锁定环还包括时钟位置检测器(20),其检测从时钟延迟部件输出的时钟信号的延迟位置,并输出另一控制信号以调整时钟延迟部件的延迟量。