波谱学杂志 ›› 2007, Vol. 24 ›› Issue (4): 426-432.

• 祝贺邬学文先生八十华诞(专辑) • 上一篇    下一篇

核磁共振任意波形发生器的研制

雷都,季文彬,乔勇,周娟,蒋瑜*   

  1. 上海市功能磁共振成像重点实验室,华东师范大学 物理系,上海,200062
  • 收稿日期:2007-08-28 出版日期:2007-12-05 发布日期:2007-12-05
  • 作者简介:雷都(1983-),男,上海人,硕士研究生,无线电物理专业.*通讯联系人:蒋瑜,电话:021-62233290, E-mail:yjiang@phy.ecnu.edu.cn.
  • 基金资助:

    上海市科委项目(06DZ11315); 上海市功能磁共振成像重点实验室开放课题基金资助.

The Design of an Arbitrary Waveform Generator

LEI Du, JI Wen-bin, QIAO Yong, ZHOU Juan,  JIANG Yu*   

  1. Shanghai Key Laboratory of Functional Magnetic Resonance Imaging, Department of Physics, East China Normal University, Shanghai 200062, China
  • Received:2007-08-28 Online:2007-12-05 Published:2007-12-05
  • About author:*Corresponding author: Jiang Yu, Tel:021-62233290, E-mail:yjiang@phy.ecnu.edu.cn.
  • Supported by:

    上海市科委项目(06DZ11315); 上海市功能磁共振成像重点实验室开放课题基金资助.

摘要:

任意波形发生器(又叫函数发生器)作为一种通用的信号源,在物理、电子、计算机等领域有着广泛的应用. 本文提出了一种不依赖PC机总线的、完全独立的、 可用于低场磁共振成像的多用途任意波形发生器(Arbitrary Waveform Generator, AWG)设计方案,围绕着这种方案,研制了80 MHz通用磁共振任意波形发生器. 并提供了实际测试数据和成像实验结果,对研制情况和实验结果进行了总结和讨论.

关键词: 核磁共振, 任意波形发生器, 直接数字合成, 模拟乘法器

Abstract:

Arbitrary Waveform Generator (AWG) plays an important role in general purpose signal generators. It is widely used in physics, electronics and computer area. In this paper, a non-PC dependent AWG designed specifically for use in low-field MRI is proposed. The performance of the AWG is tested with MRI experiment. Potential problems in the current design are discussed.

Key words: NMR, arbitrary waveform generator, DDS, analog multiplexer

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