Barker D S, Restelli A, Fedchak J A, Scherschligt J, Eckel S
Joint Quantum Institute, University of Maryland and National Institute of Standards and Technology, College Park, Maryland 20742, USA.
Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Rev Sci Instrum. 2020 Oct 1;91(10):104708. doi: 10.1063/5.0011813.
We present a wide-bandwidth, voltage-controlled current source that is easily integrated with radiofrequency magnetic field coils. Our design uses current feedback to compensate for the frequency-dependent impedance of a radiofrequency antenna. We are able to deliver peak currents greater than 100 mA over a 300 kHz to 54 MHz frequency span. The radiofrequency current source fits onto a printed circuit board smaller than 4 cm and consumes less than 1.3 W of power. It is suitable for use in deployable quantum sensors and nuclear magnetic resonance systems.
我们展示了一种宽带宽、压控电流源，它易于与射频磁场线圈集成。我们的设计采用电流反馈来补偿射频天线与频率相关的阻抗。在300 kHz至54 MHz的频率范围内，我们能够提供大于100 mA的峰值电流。该射频电流源可安装在小于4平方厘米的印刷电路板上，功耗低于1.3瓦。它适用于可部署量子传感器和核磁共振系统。
