An Accurate Voltage Reference For Automotive Applications

This article compares different topologies of simple accurate bandgap voltage references. The proposed topologies are the Brokaw bandgap reference and CMOS bandgap reference in two variants with NPN bipolar core and with PNP bipolar core. For automotive applications with wide temperature range and very low power consumption was selected the CMOS type of bandgap reference with PNP transistors which can be realized in bulk CMOS process. The selected bandgap cell was calculated and designed in automotive 180 nm CMOS technology. Calculations were compared with circuit simulations using Spectre simulator