基于CPLD的多波形发生器的设计  

Design of Multi-Waveform Generator Based on CPLD

作　　者：赵承滨[1] 刘玉利[2] 陈志学 

机构地区：[1]黑龙江科技学院,黑龙江哈尔滨150027 [2]哈尔滨学院,黑龙江哈尔滨150036 [3]中国兵器工业第205研究所,陕西西安710065

出　　处：《自动化技术与应用》2011年第6期83-87,90,共6页Techniques of Automation and Applications

摘　　要：本系统以单片机和CPLD为核心,辅以必要的模拟电路,设计了基于DDFS技术的多波形发生器,可输出三角波,方波,上下斜波、脉宽调制等各种波形,并采用六位数码管精确显示频率值。同时引入高速运放及扩流电路进一步提高了输出波形稳定性及系统的带负载能力。波形仿真及现场波形输出测试结果表明,系统精度高、稳定性好、功能强大,具有较高的实际应用价值。A kind of multi-waveform generator is designed based on direct digital frequency synthesis technology,as the MCU core and necessary analog circuits in addition.It can produce several waveforms,triangle wave,square wave,ramp up and down,pulse width modulation and so on,at the same time,all frequency value of waveforms can be accurately displayed by using six digitals.The stability of the output waveform and the system load capacity are increased by introduction of high-speed operational amplifier and extend current circuit.Output waveform simulation and field test results show that the system and with higher practical value has high-precision characteristic,high-stability,multifunction.

关 键 词：VHDL CPLD 直接数字式频率合成技术 函数发生器 

分 类 号：TM935.39[电气工程—电力电子与电力传动]