| 基于PCI总线的全功能数字化频率源 |
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| 引用本文： | 宁瑞鹏,徐勤,沈杰,李鲠颖.基于PCI总线的全功能数字化频率源[J].波谱学杂志,2006,23(2):209-215. |
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| 作者姓名： | 宁瑞鹏 徐勤 沈杰 李鲠颖 |
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| 作者单位： | 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,上海,200062;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,上海,200062;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,上海,200062;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,上海,200062 |
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| 摘 要： | 介绍了一种适用于核磁共振谱仪的全功能数字化频率源，它能够直接输出0~135 MHz的信号，且信号的频率、相位和幅度可以快速切换. 该频率源设计成基于计算机PCI总线的板卡结构，可以直接插入PC机的PCI插槽内. 在板上包含了128 k用于预先存储波形数据的静态内存，外部设备提供触发信号即可输出所需的射频波形. 该频率源具有结构简单，性能良好，成本低廉等特点，特别适用于较低设计成本的核磁共振谱仪.
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| 关 键 词： | 核磁共振 频率源 直接数字合成 PCI |
| 文章编号： | 1000-4556（2006）02-0209-07 |
| 收稿时间： | 2005-10-17 |
| 修稿时间： | 2005-11-28 |
A PCI Based Complete Digital Frequency Source for Nuclear Magnetic Resonance Spectrometer |
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| NING Rui-peng,XU Qin,SHEN Jie,LI Geng-ying.A PCI Based Complete Digital Frequency Source for Nuclear Magnetic Resonance Spectrometer[J].Chinese Journal of Magnetic Resonance,2006,23(2):209-215. |
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| Authors: | NING Rui-peng XU Qin SHEN Jie LI Geng-ying |
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| Institution: | Key Laboratory for Optical and Magnetic Resonance Spectroscopy, East China Normal University Department of Physics, East China Normal University, Shanghai 200062, China |
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| Abstract: | A PCI based complete digital frequency source for use in the nuclear magnetic resonance spectrometer is described.This frequency source is capable of generating a frequency-and phase-continuous tunable signal with output frequencies ranging from dc to 135 MHz.The frequency source is designed in such a way that it can be inserted into one PCI slot of a personal computer.There are two pieces of on board SRAM(128 k) for storing the pre-defined waveform.The RF output waveform is controlled by an external trigger signal.The present design is suitable for use in low field NMR or MRI spectrometer because of its simplicity,high performance and low cost. |
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| Keywords: | NMR frequency source DDS PCI |
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