According to an embodiment, generating an adjustable bandgap reference voltage includes generating a current proportional to absolute temperature (PTAT). Generating the PTAT current includes equalizing voltages across the terminals of a core that is designed to be traversed by the PTAT current. Generating the adjustable bandgap reference also includes generating a current inversely proportional to absolute temperature (CTAT), summing the PTAT and the CTAT currents and generating the bandgap reference voltage based on the sum of the currents. Equalizing includes connecting-across the terminals of the core a first fed-back amplifier with at least one first stage arranged as a folded setup and including first PMOS transistors arranged according to a common-gate setup. Equalizing also includes biasing the first stage based on the CTAT current. The summation of the PTAT and CTAT currents is performed in the feedback stage of the first amplifier.