并且存在着最佳反馈环路传递函数，使得其强度调制性能达到最佳。
There exists an optimal transfer function for the feedback loop which can optimize the performance of intensity modulation.
在电路设计上，根据环路传递函数的特征，利用简单的电压模式控制和基本的PI补偿器，保证了宽带环路控制的稳定性。
According to the characteristic of the control loop, simple voltage control mode and basic PI compensation are employed to ensure the stability of the converter.
根据环路滤波器传递函数以及单环锁相系统的传递函数，计算出环路滤波器的各个参数，并介绍了环路带宽的选择。
According to transfer functions of the loop filter and the single phase locked loop system, it figures out the loop filters parameters, and introduces the selection of loop bandwidth.
通过在传递函数中引入两个极点，获得了比多环路级联结构更好的系统噪声性能。
By adding two poles into the transfer function, better noise performances compared with that of the MASH structure are achieved.
可以使用NEXT干扰和环路之一的下行信道传递函数来计算FEXT干扰，该NEXT干扰在环路的上游端的两条线路之间测量。
FEXT interference can be calculated using the NEXT interference measured between the two lines at the upstream ends of the loops and the downstream channel transfer function of one of the loops.
然后从相位角度分析了锁相环环路模型，给出了相位传递函数；
Then we briefly explain the basic theory of Phase Locked Loop (PLL) and the basic characteristic of its components.
然后从相位角度分析了锁相环环路模型，给出了相位传递函数；
Then we briefly explain the basic theory of Phase Locked Loop (PLL) and the basic characteristic of its components.
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