【作者】 姚廷波； 尹秋艳；

【Author】 YAO Tingbo,YIN Qiuyan (School of Information Science and Technology,East China Normal University,Shanghai 200241)

【机构】 华东师范大学信息学院电子系；

【摘要】 在模拟锁相环中,当误差信号为相位加速信号时,就需要三阶及其以上的锁相环才能对信号进行跟踪。而四阶环相比于三阶环有更快的带外衰减和更稳定的误差信号。但由于环路中固有的非线性器件,锁相系统为非线性系统,而对锁相环非线性的研究还不多。利用鲁兹判据和李亚普洛夫第二法分别对四阶锁相环的小信号线性和非线性进行了分析,并得到系统传递函数各参数需要满足的条件。更多还原

【Abstract】 In analog PLL,when the error signal is phase acceleration signals,third-order or more than third-order PLL is needed.But as a nature extension to third-order PLL,fourth-order PLL is often chosen because the extra pole in the loop filter offers the adding additional attenuation beyond the loop bandwidth.As analog PLL system is a nonlinear system without much research on it,routh criterion and lyapunov s indirect method are used to analyze the stability of small single linear and nonlinear of a fourth-order PLL and get some equations.更多还原