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论文类型：会议论文

发表时间：2011-07-29

收录刊物：EI、CPCI-S、Scopus

卷号：255-260

页面范围：2262-2266

关键字：PLL; Three-order cascade PLL filter; Design parameter; Pspice; Bode plots; Unit-step response

摘要：In this paper, the traditional passive loop filter is improved, and a new type of Cascade Third-order filter structure and Graphical Phase Design method is proposed, which greatly simplifies high-order PLL filter's design, analysis and calculation. According to graphical phase design principle, parameters for cascade third-order filter could be figured out from the given formula, the derived result is simulated in the form of Bode plots and Unit-step response with Pspice software and the loop target under different parameters is compared. Experiments show that this third-order filter could significantly improve the stability of PLL, deeply attenuate the phase detector's high-frequency noise and is well adapted to the loop gain change. Users can also change the design parameters flexibly according to the system requirements with this filter.