On Possible Use of Quantized Voltages of Shapiro Steps for Absolute Inductance Calibration and Governing Direct Currents

It is suggested to make use of Shapiro step quantized voltages for controllable changes of magnetic flux in a superconducting loop. This makes it possible to produce a stable direct current (DC) scale by an external DC controller with the current magnitude adjustable in a ramping manner without unlocking the feedback. Also, a mutual inductance inherent to the setup can be calibrated on practically zero frequency in terms of fundamental constants and the second