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    • 6. 发明授权
    • Frequency calibration loop circuit
    • 频率校准回路电路
    • US08031009B2
    • 2011-10-04
    • US12581105
    • 2009-10-16
    • Byung Hun MinJa Yol LeeSeong Do KimCheon Soo KimHyun Kyu Yu
    • Byung Hun MinJa Yol LeeSeong Do KimCheon Soo KimHyun Kyu Yu
    • H03L7/085H03L7/095H03L7/18H03L7/081
    • H03L7/181H03L2207/50Y10S331/02
    • A frequency calibration loop circuit having a pre-set frequency channel word (FCW) command value, a bit inputted to obtain a target frequency in an oscillator and a pre-set minimum division ratio n (n is a constant) of a programmable divider, includes: an oscillator adjusting an oscillation frequency of an oscillation signal according to a control value; a programmable divider dividing the oscillation signal according to a division ratio to output a divided signal; a counter counting the number of clocks of the divided signal for one cycle of a reference signal to output a count value; and a frequency detector obtaining the control value by subtracting the count value from a reference comparison value, wherein the reference comparison value is obtained by dividing a Frequency Channel Word (FCW) command value by a minimum division ratio of the programmable divider.
    • 一种频率校准环路电路,具有预定的频道字(FCW)指令值,为了获得振荡器中的目标频率输入的比特和可编程分频器的预设最小分频比n(n是常数) 包括:振荡器,根据控制值调整振荡信号的振荡频率; 可编程分频器,根据分频比除以振荡信号,输出分频信号; 计数针对参考信号的一个周期的分频信号的时钟数,以输出计数值; 以及频率检测器,通过从参考比较值中减去计数值来获得控制值,其中通过将频率通道字(FCW)指令值除以可编程分频器的最小分频比来获得参考比较值。
    • 7. 发明申请
    • FREQUENCY CALIBRATION LOOP CIRCUIT
    • 频率校准环路
    • US20100134192A1
    • 2010-06-03
    • US12581105
    • 2009-10-16
    • Byung Hun MINJa Yol LeeSeong Do KimCheon Soo KimHyun Kyu Yu
    • Byung Hun MINJa Yol LeeSeong Do KimCheon Soo KimHyun Kyu Yu
    • H03L7/00
    • H03L7/181H03L2207/50Y10S331/02
    • A frequency calibration loop circuit having a pre-set frequency channel word (FCW) command value, a bit inputted to obtain a target frequency in an oscillator and a pre-set minimum division ratio n (n is a constant) of a programmable divider, includes: an oscillator adjusting a oscillation frequency according to control value; a programmable divider dividing the oscillation frequency according to a division ratio; a counter counting the number of clocks of the divided frequency by using a reference frequency; and a frequency detector outputting a value obtained by subtracting the number of the counted clocks from a reference comparison value, a value obtained by dividing a Frequency Channel Word (FCW) command value by a minimum division ratio of the programmable divider, as the control value of the oscillator.
    • 一种频率校准环路电路,具有预定的频道字(FCW)指令值,为了获得振荡器中的目标频率输入的比特和可编程分频器的预设最小分频比n(n是常数) 包括:振荡器根据控制值调节振荡频率; 一个可编程除法器根据分频比划分振荡频率; 通过使用参考频率对分频频率的时钟数进行计数的计数器; 输出通过从参考比较值中减去计数时钟数而得到的值的频率检测器,通过将频率通道字(FCW)指令值除以可编程分压器的最小分频比而获得的值作为控制值 的振荡器。