论文部分内容阅读
控制系统的激励、系统的检测及测量需要不同种类的信号。国内市场的多数信号源功能不强 ,能产生的信号种类少。使用直接数字频率合成 (DDS)技术设计信号发生电路 ,是一种执行固化程序产生信号的机制 ,因而可产生任意种类的信号。用硬件电路来替代CPU的程控功能 ,使得程序执行速度得到提高 ,即可产生较高频率的信号。使用DDS技术研制的信号发生器结构简单 ,稳定度好 ,成本低廉 ,其最突出的特点是更新改变输出波形的种类极其方便。对该电路的主要工作原理、结构和特点进行了简单的介绍
Incentives for control systems, systems for testing and measurement require different kinds of signals. Most signal sources in the domestic market are not strong enough to generate a small number of signals. Designing signal generation circuits using direct digital frequency synthesis (DDS) techniques is a mechanism for performing a curing process to generate a signal and thus produces any kind of signal. Hardware circuit to replace the CPU program control function, making the program execution speed is improved, you can generate a higher frequency signal. The signal generator developed by using DDS technology has the advantages of simple structure, good stability and low cost, and the most outstanding feature of the signal generator is that it is extremely convenient to change and change the types of output waveforms. The main working principle of the circuit, structure and characteristics of a brief introduction