应用AD9851实现正弦波信号源

Realization of Sine Signal with the Applying of AD9851

直接数字合成（Direct Digital Synthesis，DDS）是一种重要的频率合成技术，具有分辨率高、频率变换快等优点。介绍了采用ADI公司DD6芯片AD9851实现正弦波信号源。该信号源能产生的频率为0～70MHz，可控步长为1Hz。控制中心采用Atmel AT89S52单片机完成对AD9851、zlg7289的控制。

It is easy for direct digital synthesizers （DDS） to achieve a very high-frequency resolution and spectral purity. The paper presents a DDS-based sine signal generator whose chip is AD9851 from ADI Company. The output frequency can span the 0 MHz -70 MHz with a 1 Hz resolution. The micro-controller unit （MCU） adopts an AT89S52 from Atmel that performs all control command.