一种正弦信号发生器的设计  

Design of a sine signal generator

作　　者：刘利子[1] 黄玲[1] 谭潇雄[1] 方阁[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430072

出　　处：《电子设计工程》2009年第7期35-36,共2页Electronic Design Engineering

摘　　要：设计一个以单片机和FPGA为核心,基于DDS AD9851的正弦信号发生器,能在100 Hz^15 MHz频率范围可调。通过AGC、幅度控制、调制电路、功率放大等模块实现AM、FM、ASK、FSK、PSK多种调制功能。同时FPGA实现直接频率合成技术,产生基波信号,控制AD9851产生载波信号。用户通过按键选择系统输出调制方式,操作简单。A sine signal generator based on the DDS chip AD9851 is designed ,which uses SCM and FPGA as a core. It is modulated in the frequency range from lOOHz to 15 MHz. The system realizes the AM, FM, ASK, FSK,PSK modulations and other functions using AGC,scape-controlled amplifier, modulation and power amplification unit.Meanwhile,the fundamental wave signals are gained by direct frequency synthesis technology through Verilog programmed on FPGA.And carrier wave signals are gained by controlling of AD9851.By tapping certain keys,the users select output modulation,which is easily operated.

关 键 词：AD9851 89C51 可编程逻辑阵列 正弦信号发生器 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]