Doppler shift compensation by interpolation of a new sample between successively received signal samples using stored values of an interpolation function. The system includes a battery charger configured to couple to a device for supplying current to the device, a current sensor coupled to the battery charger for measuring current supplied from the battery charger to the device, the current sensor configured to generate a measured current profile based on the measured current supplied to the device, and a processor coupled to the current sensor. The circuitry then enables power supply to the battery-less phone and generates a turn-on signal directing the mobile phone to automatically power-on and enter into a particular state of operation, for example a test or software loading mode. As a result, the group of separation sub-layers mitigates grain growth in the group of primary conduction sub-layers. This makes subsequent production processes easier. The spatulas can be oriented contemporaneously and with different orientations with respect to an axial direction of the rotor which, for this purpose, comprises an external jacket and an internal jacket which can, on command, translate relatively to each other so as to cause a positioning of the spatulas, made possible by a guided rotatable coupling of the spatulas in relation to the rotor.