FIG. 6 illustrates an example embodiment of a part of the interfaces of FIGS. 2 and 4 and, more precisely, of a comparison circuit 600 of the circuit CTRL, which is configured to compare voltage V_T with thresholds Vth, Vth_l, and Vth_h.

The circuit 600 comprises an input stage 601 comprising an operational amplifier 602. Stage 601 receives the voltage VT and provides a voltage VT′, the value of which is representative of that of voltage V_T.

In the case where winding 1102 is connected between node 118 and component 116, as illustrated in FIG. 2, stage 601 is, for example, configured to shift the voltage VT and to divide it so that the output voltage V_T′ has a positive value.

In the case where the winding 1102 is connected between node 122 and component 116 as illustrated in FIG. 4, stage 601 is, for example, configured to subtract the voltage Vsrc or Vref from the voltage V_T and to divide the result, so that the output voltage V_T′ has a positive value independent from the value of the voltage Vsrc.

The circuit 600 further comprises comparator 603. The comparator 603 is configured to compare the value of the voltage V_T with the threshold Vth, by comparing the voltage V_T′ with a voltage Vth′ representative of the threshold Vth. In particular, when stage 601 provides a positive voltage V_T′, the voltage Vth′ is positive, simplifying the implementation of the comparator 603.