An adjustable bandgap reference voltage includes a first circuit for generating IPTAT, a second circuit for generating ICTAT, and an output module configured to generate the reference voltage. The first circuit includes a first amplifier connected to terminals of a core for equalizing voltages across the terminals, where the first amplifier has a first stage that is biased by the current inversely proportional to absolute temperature and is arranged according to a folded setup with first PMOS transistors arranged according to a common-gate setup. The first circuit also includes a feedback stage with an input connected to the first amplifier output. The feedback stage output is connected to the first stage input and to a terminal of the core. The second circuit includes a follower amplifier connected to a terminal of the core and separated from the first amplifier and the output module is connected to the feedback stage.