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    • 93. 发明申请
    • System and Method to Improve the Efficiency of Synchronous Mirror Delays and Delay Locked Loops
    • 提高同步镜延迟和延迟锁定环的效率的系统和方法
    • US20100026351A1
    • 2010-02-04
    • US12574847
    • 2009-10-07
    • Feng Lin
    • Feng Lin
    • H03L7/00
    • G11C7/222G06F1/10G11C7/22H03L7/0814
    • A phase detection system for use with a synchronous mirror delay or a delay-locked loop in order to reduce the number of delay stages required, and therefore increase the efficiency, is disclosed. The invention includes taking a clock input signal and a clock delay or feedback signal, each having timing characteristics, and differentiating between four conditions based upon the timing characteristics of the signals. The phase detector and associated circuitry then determines, based upon the timing characteristics of the signals, which of a number of phase conditions the signals are in. Selectors select the signals to be introduced into the synchronous mirror delay or delay-locked loop by the timing characteristics of the phase conditions. The system is able to utilize the falling clock edge of the clock input signal, and the lock time is decreased under specific phase conditions. The invention increases the efficiency of the circuits by reducing the effective delay stages in the SMD or DLL while maintaining the operating range.
    • 公开了一种用于同步镜延迟或延迟锁定环路的相位检测系统,以便减少所需的延迟级数,从而提高效率。 本发明包括采用每个具有定时特性的时钟输入信号和时钟延迟或反馈信号,并且基于信号的定时特性来区分四个条件。 相位检测器和相关电路然后基于信号的定时特性来确定信号处于多个相位条件中的哪一个。选择器通过定时选择要被引入同步镜延迟或延迟锁定环路的信号 相位条件的特征。 该系统能够利用时钟输入信号的下降时钟边沿,并且在特定相位条件下锁定时间减少。 本发明通过在保持工作范围的同时减少SMD或DLL中的有效延迟级来提高电路的效率。
    • 94. 发明授权
    • Phase detector for reducing noise
    • 相位检测器,用于降低噪音
    • US07639090B2
    • 2009-12-29
    • US12324077
    • 2008-11-26
    • Feng Lin
    • Feng Lin
    • H03L7/06
    • H03L7/0814H03L7/07H03L7/089
    • The present invention provides a method and an apparatus for reducing noise. The apparatus includes a phase detector adapted to determine a phase difference between a first and a second signal, a first circuit adapted to generate a control signal based upon the determined phase difference, and a second circuit. The second circuit is adapted to receive a third signal, receive a fourth signal, modify the fourth signal based upon the control signal, and provide the third signal and the modified fourth signal to the phase detector as the first and second signals.
    • 本发明提供一种降低噪声的方法和装置。 该装置包括相位检测器,其适于确定第一和第二信号之间的相位差,适于基于所确定的相位差产生控制信号的第一电路和第二电路。 第二电路适于接收第三信号,接收第四信号,基于控制信号修改第四信号,并将第三信号和修改的第四信号提供给相位检测器作为第一和第二信号。
    • 95. 发明授权
    • Delay-lock loop and method adapting itself to operate over a wide frequency range
    • 延迟锁定环路和方法适应于在宽频率范围内工作
    • US07619458B2
    • 2009-11-17
    • US11521837
    • 2006-09-14
    • Feng Lin
    • Feng Lin
    • H03K3/00
    • G11C29/02G11C7/20G11C7/22G11C7/222G11C11/4072G11C11/4076G11C29/023G11C29/028G11C29/50012G11C2029/0409
    • A delay-lock loop receives an input clock signal from the output of a programmable divider that receives a reference clock signal. The delay-lock loop includes a voltage-controlled delay line generating a plurality of delayed clock signals having different phases. A plurality of the delayed clock signals are combined to generate a plurality of output signals. During an initialization period, an initialization circuit sets the delay of the delay line to a minimum delay value and then compares this delay value to the period of the input clock signal. Based on this comparison, the initialization circuit programs the programmable divider and adjusts the number of delayed clock signals combined to generate the output signals. More specifically, as the frequency of the reference clock signal increases, the divider is programmed to divide by a greater number, and a larger number of delay clock signals are combined to generate the output signals.
    • 延迟锁定环路接收来自接收参考时钟信号的可编程分频器的输出端的输入时钟信号。 延迟锁定环包括产生具有不同相位的多个延迟时钟信号的电压控制延迟线。 多个延迟的时钟信号被组合以产生多个输出信号。 在初始化期间,初始化电路将延迟线的延迟设定为最小延迟值,然后将该延迟值与输入时钟信号的周期进行比较。 基于该比较,初始化电路对可编程分频器进行编程,并调整组合的延迟时钟信号的数量以产生输出信号。 更具体地,随着参考时钟信号的频率增加,分频器被编程为除以更大的数量,并且更大数量的延迟时钟信号被组合以产生输出信号。
    • 98. 发明授权
    • Phase detector for reducing noise
    • 相位检测器,用于降低噪音
    • US07463099B2
    • 2008-12-09
    • US11524842
    • 2006-09-21
    • Feng Lin
    • Feng Lin
    • H03D3/00
    • H03L7/0814H03L7/07H03L7/089
    • The present invention provides a method and an apparatus for reducing noise. The apparatus includes a phase detector adapted to determine a phase difference between a first and a second signal, a first circuit adapted to generate a control signal based upon the determined phase difference, and a second circuit. The second circuit is adapted to receive a third signal, receive a fourth signal, modify the fourth signal based upon the control signal, and provide the third signal and the modified fourth signal to the phase detector as the first and second signals.
    • 本发明提供一种降低噪声的方法和装置。 该装置包括相位检测器,其适于确定第一和第二信号之间的相位差,适于基于所确定的相位差产生控制信号的第一电路和第二电路。 第二电路适于接收第三信号,接收第四信号,基于控制信号修改第四信号,并将第三信号和修改的第四信号提供给相位检测器作为第一和第二信号。