Modeling and simulation of arbitrary ordered nonlinear charge-pump phase-locked loops
Modeling and simulation of arbitrary ordered nonlinear charge-pump phase-locked loops
复制标题
任意阶非线性电荷泵锁相环的建模和仿真
DOI：
10.1109/scd.2011.6068711
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
U. Hilleringmann
中科院分区：
文献类型：
--
作者：
C. Wiegand;C. Hangmann;C. Hedayat;U. Hilleringmann
电荷泵锁相环(CP-PLL)的仿真是设计中的一个挑战。这个问题与混合信号和非线性行为以及高频和低频功能块的存在有关。提出了一种高效、准确的暂态特性仿真分析方法。为此，考虑了诸如死区、电流/时序失配、泄漏电流和非线性压控振荡器特性等非理想情况。此外，将该方法应用于具有任意环路滤波器的CP-PLL系统，通过求解微分方程组的模拟部分，并通过求解系统关于鉴相器和鉴频器时间切换时刻的相位方程来实现。
The simulation of charge-pump phase-locked loops (CP-PLL) is a challenge within the design. The problem is related to the mixed-signal and nonlinear behavior as well as the existence of high and low frequency functional blocks. Here a methodology is presented for the efficient and accurate simulation and analysis of the transient characteristic. For this, nonidealities like dead-zone, current/timing mismatches, leakage current and the nonlinear voltage controlled oscillator characteristic are considered. Moreover, the proposed technique is applied to CP-PLL systems with arbitrary loop filters by using the solution of the analog parts of the differential equation system and by solving the phase equation of the system with regard to the switching instant of time of the phase and frequency detector.