波谱学杂志 ›› 2007, Vol. 24 ›› Issue (3): 321-327.

• 研究论文 • 上一篇    下一篇

通用硬件脉冲序列发生器的研制

季文彬;乔勇;雷都;李建奇;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:2006-11-15 修回日期:2007-01-16 出版日期:2007-09-05 发布日期:2009-12-05
  • 通讯作者: 蒋瑜

Hardware Design for a General-purpose Pulse Generator Used in NMR Spectrometers

JI Wen-bin;QIAO Yong;LEI Du;LI Jian-qi;JIANG Yu   

  1. Shanghai Key Laboratory of Functional Magnetic Resonance Imaging, Department of Physics, East China Normal University, Shanghai 200062, China
  • Received:2006-11-15 Revised:2007-01-16 Online:2007-09-05 Published:2009-12-05
  • Contact: Jiang Yu

摘要: 为了满足任意核磁共振脉冲序列的需要,提高脉冲序列发生器的性能和稳定性,本文提出了一种基于现场可编程逻辑器件(FPGA)和大容量高位宽静态存储器(SRAM)的硬件脉冲序列发生器,详细讨论了这种设计方案的特点,并通过一系列实验验证了其性能和可行性.

关键词: 脉冲序列发生器, 磁共振, 时间分辨率, 最小脉宽

Abstract: In this paper, we present the hardware design for a general-purpose pulse generator used in NMR spectrometers. The architecture of the pulse generator was significantly simplified by using a field programmable gate array (FPGA) and a synchronous static ram. This design guaranteed the flexibility and easy-to-upgrade feature of the pulse generator. Compared to the conventional designs, the new design allowed finer pulse width and faster switching time. The performance of the new pulse generator was evaluated by NMR experiments.

Key words: NMR, pulse generator, time resolution, minimal pulse width