叙述一种单线圈双调谐探头的电路分析.单线圈双调谐探头同时提供两个不同信号源的发射和接收。探头使用同一个射频线圈进行核磁共振观察和场频联锁。应用二端网络原理对单线圈双调谐探头的电路进行分析,推导出计算探头参量的近似公式.依据公式设计了CH—100型付立叶变换核磁共振波谱仪的高质量探头电路。仪器性能:S/N为50:1在5毫米氢探头和1%乙基苯,并且40%乙醛得4.97×10~(-9)的分辨率. Describe the circuit analysis of a single-coil double-tuned probe. Single-coil double-tuned probes also provide the transmission and reception of two different sources simultaneously. The probe uses the same RF coil for NMR observation and field-frequency interlocking. The two-terminal network theory is used to analyze the circuit of single-coil dual-tuned probe, and the approximate formula for calculating the probe parameters is deduced.The high-quality probe circuit of the CH-100 Fourier transform nuclear magnetic resonance spectrometer is designed according to the formula. Instrument performance: S / N 50: 1 in 5 mm hydrogen probe and 1% ethylbenzene, and 40% acetaldehyde 4.97 × 10 -9 resolution.