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    • 42. 发明专利
    • Pll apparatus
    • PLL装置
    • JP2007274612A
    • 2007-10-18
    • JP2006100614
    • 2006-03-31
    • Nippon Dempa Kogyo Co Ltd日本電波工業株式会社
    • ONISHI NAOKIWAKAMATSU SHUNICHISHIOBARA TAKESHI
    • H03L7/14H03L7/091H03L7/093
    • H03L7/091H03L7/085H03L7/093H03L7/146H03L7/185H03L2207/12
    • PROBLEM TO BE SOLVED: To provide a PLL apparatus in which a frequency signal that is synchronized with a reference frequency signal from outside is output from a voltage-controlled oscillator, wherein frequency deviation is suppressed even when a fault occurs in the reference signal from outside. SOLUTION: The signal level of the reference frequency signal from outside is monitored, and when the signal level is within a set range, the PLL control is performed using the phase-difference related data produced by a phase-difference data producing means, while, when the signal level is out of the set range, the PLL control is performed by switching to the phase-difference related data stored in a storage, such as stored latest data or data produced beforehand, by recognizing that a stoppage or an anomaly happens in the supply of the signal. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种PLL装置,其中从压控振荡器输出与来自外部的参考频率信号同步的频率信号,其中即使在参考中发生故障也频率偏差被抑制 来自外面的信号

      解决方案:监视来自外部的参考频率信号的信号电平,并且当信号电平在设定范围内时,使用由相位差数据产生装置产生的相位差相关数据执行PLL控制 而当信号电平超出设定范围时,通过将存储在存储器中的相位差相关数据(例如存储的最新数据或预先产生的数据)通过识别停止或 在信号供应中发生异常。 版权所有(C)2008,JPO&INPIT