【作者】 季文彬； 乔勇； 雷都； 李建奇； 蒋瑜；

【Author】 Ji Wenbin Qiao Yong Lei Du Jiang Yu~* (Key Laboratory of Optics and NMR Spectroscopy,Department of Physics,East China Normal University,Shanghai,200062)

【机构】 华东师范大学物理系,华东师范大学光谱学与波谱学教育部重点实验室；

【摘要】 <正>本文提出了一种可用于磁共振系统、整合了通用串行总线(USB)、可编程逻辑器件 (FPGA)和数字直接合成(DDS)的任意波形发生器(AWG)设计方案。它在传统的任意波形发生器设计上加入了通用串行总线,从而大大简化了波形数据的下载。通过波形更多还原

【Abstract】 A high stable multi-purpose AWG is proposed in this paper.It’s well designed to meet the increasing demand of NMR.With the introduction of the USB interface,the waveform download process is greatly simplified.New method of gain control is used to obtain freer amplitude adjust step while keep the waveform smooth.In addition,the stability of the system is guaranteed by using an oven controlled crystal oscillator.The characteristics of the apparatus and some NMR experiments obtained with it will be shown.更多还原