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Note: A Radio Frequency Voltage-Controlled Current Source for Quantum Spin Manipulation



Daniel S. Barker, Alessandro Restelli, James A. Fedchak, Julia K. Scherschligt, Stephen P. Eckel


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 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.
Review of Scientific Instruments


NMR, atomic physics, radiofrequency, quantum physics


Barker, D. , Restelli, A. , Fedchak, J. , Scherschligt, J. and Eckel, S. (2020), Note: A Radio Frequency Voltage-Controlled Current Source for Quantum Spin Manipulation, Review of Scientific Instruments (Accessed July 15, 2024)


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Created October 18, 2020, Updated October 19, 2020