基于FPGA和AD768的高精度多路信号源设计

Design of High Accuracy Multi-channel Signal Source Based on FPGA and AD768

设计了一种基于DDS原理,采用FPGA和AD 768实现的高精度信号源。针对理想方波信号包含无穷频率分量、可用于动态特性测试的特点,提出了采用单刀双掷电子开关切换两路电平生成方波信号的实现方法,具有上升沿和下降沿速度快的优点。最后,通过实验给出了实际方波信号的时延特性。

The high accuracy multi-channel signal source is an important component of the test equipment.This paper designs a high accuracy multi-channel supply oscillator based on FPGA and AD768.Meanwhile,it proposes that using an electronic switch to transfer two channels to generate square signal with fast rising edge and fall edge.At last,it tests the delay characteristic of the square signal.