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数字式调频收音机设计
内容摘要:本文利用数字锁相频率合成技术构成收音机的电调谐部分,
完成收音机的调台、选台、搜索与存储等功能。本文着重介绍了 SONY 公
司生产的收音机集成芯片 CXA1019S 构成的 FM 调频电路、频率合成器芯
片 BU2614 构成的锁相环电路和 MCS-51 系列单片机及其外围电路组成的
键盘、显示和存储电路。
关键词:调频 本振频率 锁相环 频率合成器 单片机
The Design of Digital Frequency Modulation Tuner
Liu FuHua
(Class 9703, Automation Department)
Abstract:
According to the demand of my design, I utilized the digital
frequency synthesizing technology to form the electric parts of the
frequency modulation tuner. This tuner owns the functions of tuning
and selecting channels, searching, storing and so on. In my paper, I
emphasized on the FM frequency tuning circuit that consists of the
ICs CXA1019S from Sony corp., the phase locking loop circuit
formed by BU2614 PLL frequency synthesizer, MCS51 monolithic
processor and the other circuits of keyboards, screen and storage.
Keyword:
Frequency tuning, oscillating frequency by itself, phase locking
loop, frequency synthesizer, monolithic processor.