低场磁共振信号无源放大电路的分析

Analysis of Passive Amplifying Circuit for Low Field Magnetic Resonance Signal

文章阐述了磁共振技术的分类及应用 ,重点分析了低场磁共振的技术特点 ,在对磁共振回波信号无源放大电路的功能和结构进行分析之后 ,建立了无源放大电路的简化模型 ,据此简化模型对无源放大电路的放大倍数和带宽等参数作了计算 ,计算结论与实验结果基本一致 ,从而验证了文章的分析结论和电路简化模型 。

The technical characters of low field NMR are described at first. Then after analyzing the function and structure of the passive amplifying circuit for low field NMR signal, the mathematical model of the circuit is built. Parameters like gain and bandwidth are simulated based on the mathematical model. The simulation results are close to the experimental results, which prove that the analysis and the mathematical model are true.