One aspect of the present subject matter relates to a method for forming a transistor. In one embodiment, a coupled inductor topology for the multi-phase transformers comprising N primary inductors. After determining a common-mode voltage of a pair of differential outputs from the differential amplifier, the bias generation circuit generates a bias voltage, which is proportional to the determined common-mode voltage, to the differential amplifier such that the common-mode input voltage range of the differential amplifier is extended to as far as the rail-to-rail voltage. The medication prescription data includes a consultation requirement for the medication prescription.