正弦波非线性平滑变频方法的实现  

Realization of the Sinusoidal Wave Non-linear Smooth Frequency Conversion Method

作　　者：史延东[1] 陈国锐[1] 宁飞[1] 刘婕妤[1] 

机构地区：[1]西北工业大学自动化学院,西安710129

出　　处：《机电一体化》2010年第11期81-85,共5页Mechatronics

摘　　要：提出了一种基于DDS(直接数字频率合成)技术的正弦信号发生器波形平滑变频的设计与实现方案,阐述了正弦信号发生器的硬件电路、系统程序总体设计和非线性平滑变频方法的实现。该方法解决了正弦波形在非线性变化频率过程中造成的叠加和脉冲跳变等问题,提高了正弦波形变频中两波形的衔接平滑度。实验和实测结果表明,该方法的硬件电路简单、程序设计灵活巧妙、波形衔接平滑度好、可靠性高,具有较高的实用价值。A new method of sinusoidal signal generator non-linear smoothing during frequency conversing is presented in this paper. The hardware circuit and system program design, as well as the method of non-linear smooth frequency conversion are introduced later. The superimposition and the pulse jump problems, which create in real-time nonlinearities change frequency process, has solved by using this method. In experiments, the actual result indicated this method is simple and flexible, and the performance is excellent.

关 键 词：DDS 正弦信号发生器 平滑变频 

分 类 号：TN741[电子电信—电路与系统]