基于AD9957的数字调制信号源设计

介绍了ADI 公司具有内部调制功能的高速DDS器件AD9957的特点与应用，并提出了一种全新的高速调制信号源设计方案,给出了硬件结构框图和软件流程，详细介绍了系统工作原理。实践证明,输出正弦波最高频率达400 MHz ,调制波调制速度可达1 MHz。 Abstract:  The features and applicaTIons of AD9957 are introduced, AD9957 manufactured by Analog Devices,Inc ,it funcTIons as a I/Q modulator, and a new design of hign speed modulaTIon signal source based on AD9957 was put forward.It’s proved that the maximal frequency of sine wave can get up to 400MHz , and the modulaTIon speed can achieve 1MHz.