An input circuit arrangement comprises an input, a comparator, and an evaluation circuit. Each channel region has a first portion disposed in the substrate strip and extending along one of the trenches, a second portion extending underneath the one trench, a third portion extending along the one trench, and a fourth portion extending along the substrate surface and under one of the control gates. The system further includes a power converter coupled to the rotor of the doubly fed induction generator, the power converter providing an output to a line bus, and a transformer coupled to the stator bus.