In this paper a resistor-less voltage reference generator exploiting transistor working in the subthreshold region is presented. Thanks to the adoption of a configurable active load, the circuit leads to 6.9× lower process sensitivity across corners. Post-layout simulations show a temperature coefficient equal to 19.4 ppm/°C and a line sensitivity of 0.009 %/V with an area occupation of only 0.000156 mm2.