反馈控制电路(000001).pdf

一、选择题（将一个正确选项前的字母填在括号内）1自动增益控制简称（A）AAGC B AFC CAPC2 锁相环路电路的作用是（B）A维持工作频率稳定 B实现无频率误差的频率跟踪C使输出信号幅度保持恒定或仅在很小的范围内变化二、填空题2锁相环路由鉴相器、环路滤波器和压控振荡器组成，它的主要作用是用于实现两个电信号相位同步，即可实现无频率误差的频率跟踪。三、简答题1锁相环路与自动频率控制电路实现稳频功能时，哪种性能优越？为什么？答：锁相环路稳频效果优越。这是由于一般的 AFC 技术存在着固有频率误差问题（因为AFC 是利用误差来减小误差），往往达不到所要求的频率精度，而采用锁相技术进行稳频时，可实现零偏差跟踪。2锁相环路由哪几个部分组成？说明其工作原理，它有哪几种自动调节过程？解：由鉴相器(PD)、环路滤波器(LF)、压控振荡器(VCO)组成原理是：进行频率自动跟踪，使输出信号的频率和输入信号的频率相等。当 VCO 由于某种原因而发生变化时，必然相应地产生相位变化，这种相位变化在PD中与输入信号比较，产生相差，PD输出正比于相差，经 LF 滤除高频分量，取出低频分量，用来控制VCO 的压控元件，使其频率趋于输入信号频率。锁相环路的两种自动调节过程是捕捉和跟踪。四、计算题1锁相环路调频波解调器原理电路如图12.7，试分析其解调过程。图12.7 锁相环路调频解调器原理框图解：设输入调频波为uFM(t)=Uimsinit+Kf=Uimsinot+1(t)1(t)=(i-o)t+Kfi为调频波中心频率，o为VCO 固定频率，当 VCO 的频率锁定在 i上时，有此时 VCO 的输入信号，即解调输出电压uo(t)正比于，故从环路滤波器的输出就可得到调频波解调信号。2锁相环路频率合成器如图12.8所示，分析输出频率和输入频率的关系。若已知 fR=100kHZ，M=10，可变分频器的分频比为N=85-96，试求输出频率的可控范围。解：fi=fR/M因为文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4，所以 fo=HZ=（850960）kHZ3如图 12.9所示为双环频率合成器，由两个锁相环和一个混频滤波电路组成。两个参考频率fr1=1kHZ，fr2=100kHZ。可变分频器的分频比范围分别为 n1=1000011000，n2=7201000，固定分频器的分频比n3=10，求输出频率 fy的频率调节范围和频率间隔。解：环路 I是锁相倍频电路。输出频率fo1=n1fr1fo1经n3固定分频后，输出fo2=fr1fo2经n2固定分频后，输出fo3=fr1设混频器输出端用带通滤波器取出和频信号环路也是锁相倍频电路，所以输出频率fy=n2fo4=n2fr2+fr1=n2fr2+fo2由于 n2fr2调节范围为 72100MHZ，频率间隔 0.1MHZ，fo2=fr1的调节范围 11.1MHZ，频率间隔 100HZ所以，fy总调节范围为 73101.1MHZ，间隔为 100HZ，总频率数为281000个。环路 I的输入参考频率为1kHZ，环路的输入参考频率为101101.53kHZ。文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H44已知晶体振荡频率为1024kHZ，当要求输出频率范围为40500kHZ，频率间隔为 1kHZ，试确定图 12.10频率合成器中的分频比R及N的值。图12.10 单环锁相频率合成器解：fs=1024kHZ，fo=40500kHZ，fr=1kHZ，故R=N=文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4文档编码:CW2G9N2Y4H9 HD2G9E2H6C8 ZM1S7Q7M8H4