A reference voltage circuit and method making same, the reference voltage circuit including: a first sub-circuit for generating first and second temperature-compensated voltages; a second sub-circuit configured to receive the first and second temperature-compensated voltages and generate first and second reference voltages based on the first and second temperature-compensated voltages, respectively; and a third sub-circuit configured to receive and change voltage levels of the first and second reference voltages, and output a third reference voltage.