1GSPS高速数据采集系统的设计与实现

Design and Realization of 1Gsps High Speed Data Acquisition System

交替采样技术是一种理想的提高采样率的方法，但所伴随的高速输出数据对存储也带来了一定的困难。本文介绍了一种基于交替采样技术的高速数据采集系统，该系统采用了两片采样率为500Msps的A／D转换器，实现了1Gsps的采样率，并利用FPGA对A／D转换器的输出数据进行转换和缓存。本文着重介绍了该数据采集系统的数据转换和数据存储，并给出了仿真波形。

Time-interleaved sampling technique is an idea method to enhance a sampling rate, however, the high sampiing rate causes to a difficulty of storing the high-speed output data. This paper introduces a kind of high-speed data acquisition system based on time-interleaved technique. The system achieves a high sampling rate up to 1Gsps using two A/D converters with a comparatively lower sampling rate of 500Msps. Conversion and buffered storage of the output data from the A/D converters are implemented in FPGA. The data conversion and storage of the said data acquisition system are emphasized in this paper and a functional simulation waveform is given.