Curvature-compensated BiCMOS bandgap with 1-V supply voltage

In this paper, we present a bandgap circuit capable of generating a reference voltage of 0.54 V, The circuit, implemented in a submicron BiCMOS technology, operates with a supply voltage of 1 V,consuming 92 muW at room temperature, In the bandgap circuit proposed, we use a nonconventional operational amplifier which achieves virtually zero systematic offset, operating directly from the l-V power supply. The bandgap architecture used allows a straightforward implementation of the curvature compensation method. The proposed circuit achieves 7.5 ppm/K of temperature coefficient and 212 ppm/V of supply voltage dependence, without requiring additional operational amplifiers or complex circuits for the curvature compensation.