摘要
文中是关于用DDS芯片和单片机设计一种精密微型短波信号发生器的可行性论证。文章简述其基本原理,并着重于硬件角度的描述。当输入时钟信号为12.8MHz时,输出频率上限可达30.72MHz。利用现代数字化系统的优势,应用先进的DDS专用芯片AD8951与单片机配合,实现频率、相位的准确输出,可靠性高。设计方案适用于当代尖端的通信系统和高精度仪器。
In this article, an accurate short wave signal generator design and its principle were briefly described. The hardware was emphatic introduced. This design is based on DDS, AT98S51, LCD, keyboard, amplifier, ROM and so on. The frequency and phase can be modified digitally. When 12.6MHz signal was applied, the uppermost frequency limit exceeds 30.72MHz. In the design used DDS chip AD9851. This advanced design gave the system an excellent performance and high reliability. Because of the controlling of the MCU and DDS were used, the frequency and phase is very accurate. Whole system is very natty and has highly dependability. The design is applicable to contemporary sophisticated communicate by letter system or high precision instrument.
出处
《国外电子测量技术》
2006年第5期51-53,共3页
Foreign Electronic Measurement Technology
