A PCI Based Complete Digital Frequency Source for Nuclear Magnetic Resonance Spectrometer

Abstract

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.

Key words: NMR, frequency source, DDS, PCI

CLC Number:

O482.53

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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A PCI Based Complete Digital Frequency Source for Nuclear Magnetic Resonance Spectrometer

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