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arXiv · 2004.10538

A radiofrequency voltage-controlled current source for quantum spin manipulation

D. S. Barker·A. Restelli·J. A. Fedchak·J. Scherschligt·S. Eckel
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Abstract

We present a design for 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 $4~\text{cm}^2$ and consumes less than 1.3 W of power. It is suitable for use in deployable quantum sensors and nuclear-magnetic-resonance systems.

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D. S. Barker, A. Restelli, J. A. Fedchak, J. Scherschligt, S. Eckel. 2020-04-22. A radiofrequency voltage-controlled current source for quantum spin manipulation. https://doi.org/10.1063/5.0011813

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