IEEE2001Curvature-Compensated BiCMOS Bandgap with1-V Supply Voltage

semico_ljj

Curvature-Compensated BiCMOS Bandgap with1-V Supply Voltage
by
Piero Malcovati, Franco Maloberti, Fellow, IEEE, Carlo Fiocchi, and Marcello Pruzzi

Abstract—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 W at room temperature. In the
bandgap circuit proposed, we use a nonconventional operational
amplifier which achieves virtually zero systematic offset, operating
directly from the 1-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.
Index Terms—Analog integrated circuits, MiCMOS analog integrated
circuits.