Adjustable phase device for low‐frequency NMR experiments

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Adjustable phase device for low‐frequency NMR experiments

机译：用于低频NMR实验的可调相装置

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In order to detect low‐level NMR signals by bridge methods, a phase displacing device based on principle of voltage addition has been developed allowing the precise bridge balancing over a one decade frequency range. Using analogous multiplier devices for control and adjust circuit the phase adjustment of the output voltage is within ±3° over a frequency range from 10 to 100 kHz. For input peak‐to‐peak voltage levels from 0.1 to 1 V the output level is amplitude‐stabilized to within 2% for all phase displacements.

机译：为了通过电桥方法检测低水平的NMR信号，已经开发了一种基于电压相加原理的移相设备，可以在十个频率范围内实现精确的电桥平衡。使用类似的乘法器设备来控制和调节电路，在10至100 kHz的频率范围内，输出电压的相位调节在±3°范围内。对于从0.1到1 V的输入峰峰值电压电平，对于所有相移，输出电平的幅度稳定在2％以内。

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《Review of Scientific Instruments》 |1979年第12期|P.1521-1526|共6页
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Adjustable phase device for low‐frequency NMR experiments

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