Configurable reference voltage generator

Abstract

Reference voltage generators provide stable reference voltages to facilitate correct circuit operation. Bandgap voltage generators are becoming less feasible as process nodes shrink. In example implementations, to accommodate smaller devices, an apparatus for generating a reference voltage includes a current generator having at least one current branch that receives a supply voltage, with the current branch including at least one cascode transistor that receives a bias voltage value. The apparatus also includes a first voltage generator that receives a first bias current from the current generator and provides a first voltage value being complementary to absolute temperature. The apparatus further includes a second voltage generator that receives a second bias current from the current generator and provides a second voltage value being proportional to absolute temperature. The apparatus provides a temperature-compensated third voltage value based on a combination of the first voltage value and the second voltage value.