摘要
本文采用锁相环技术产生调频信号,设计了一款具有载波频率可调,频率稳定度高且失真小,采用普通收音机的调频波段即可接收的无线语音调频发射机。测试结果表明,各项指标均达到了设计要求,并且制作成本低。课题重点在于设计能给发射机调制电路提供稳定载波频率的锁相环电路。
A Frequency Modulation （ FM ） transmitter with adjustable carrier frequency , high frequency stability and high fidelity performance is designed and implemented by using Phase Locked-Loop （ PLL ） techniques in this paper , a conventional FM radio can be applied for the transmitted voice signal . The measurements show that it well agrees with the design requirement , in addition , it is a cost saving solution for this kind of design . The very key point of this paper is designing a PLL circuit which can provide a stable VHF carrier frequency for the modulation part of transmitter .
出处
《电子设计工程》
2015年第1期54-57,共4页
Electronic Design Engineering
关键词
无线发射机
载波
调频
锁相环
Frequency Modulation（FM） Phase Locked-Loop（PLL）
wireless transmitter
carrier
