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基于水冷磁体的超高场核磁共振波谱仪前置放大器系统设计与实现

, PP. 185-195

Keywords: 固体核磁共振(solidstateNMR),波谱仪,水冷磁体,前置放大器,低噪声放大器

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Abstract:

基于水冷电磁体的超高场核磁共振实验的需求,提出了一种适用于该类核磁共振波谱仪的前置放大器系统的设计方案并予以实现.该系统包括前置放大器控制器、高带前置放大器、高带混频器、宽带前置放大器以及宽带混频器,实现了通道之间的自由切换、发射与接收的快速切换以及较大的接收动态范围、较低的噪声系数.

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