基于嵌入式系统的功率可控FSK电路的实现

Design of BER test apparatus based on embedded system

设计了一种基于直接数字频率合成技术的2FSK调制电路。将含有PC104总线模块的嵌入式系统和FPGA,数字电位器相结合,实现了基于嵌入式系统的功率可控FSK电路。将嵌入式系统作为控制中心,用FPGA实现DDS技术的核心单元,把高精度数字电位器作为功率控制电路的核心器件。通过实验表明,设计的电路达到了产生FSK信号并能精确地控制其功率的目的。

This paper designed a 2FSK modulation circuit based on direct digital frequency synthesis technology,realized the power controlled FSK circuit by combining FPGA,digital potentiometer and embedded system which comtain PC104 bus module.The embedded system is as a control center,FPGA as DDS technology core unit,the high precision digital potentiometer circuit as the core of power control devices.The experiments show that the circuit achieves the purpose,to produce FSK signal accurately and control the power.