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    • 11. 发明申请
    • Phase locked loop circuit and method of locking a phase
    • 锁相环电路及锁相方法
    • US20060284657A1
    • 2006-12-21
    • US11430199
    • 2006-05-09
    • Moon-Sook ParkKyu-Hyoun Kim
    • Moon-Sook ParkKyu-Hyoun Kim
    • H03L7/06
    • H03L7/0995H03K3/0315H03K5/133H03L7/089H03L7/0891H03L7/093
    • A phase locked loop circuit and method of locking a phase. The phased locked loop circuit may include a phase detector receiving an external clock signal and a feedback clock signal and outputting an up signal when a phase of the external clock signal leads a phase of the feedback clock signal and outputting a down signal when the phase of the external clock signal lags the phase of the feedback clock signal, a loop filter circuit increasing a control voltage in response to the up signal and decreasing the control voltage in response to the down signal, and a voltage controlled oscillator circuit receiving the control voltage and directly generating at least n (where n is an integer ≧4) internal clock signals. The phased locked loop circuit may also include a voltage controlled oscillator circuit, including at least four loops, receiving the control voltage and generating multiple internal clock signals.
    • 一种锁相环电路及锁相方法。 相位锁定环电路可以包括接收外部时钟信号和反馈时钟信号的相位检测器,并且当外部时钟信号的相位引导反馈时钟信号的相位并在相位为 外部时钟信号滞后于反馈时钟信号的相位,环路滤波器电路响应于上升信号增加控制电压,并响应于下降信号降低控制电压,以及压控振荡器电路接收控制电压和 直接产生n个(其中n是整数> = 4)内部时钟信号。 相位锁定环路电路还可以包括压控振荡器电路,其包括至少四个环路,接收控制电压并产生多个内部时钟信号。