Abstract
In this work a novel resistorless sub-bandgap voltage reference (BGR) is introduced. It is a self-biased and small area topology that works in the nano-ampere current consumption range, and under 1 V of power supply. The analytical behavior of the circuit is described, and simulation results for a standard 0.18 μm CMOS process are analysed. A reference voltage of 479 mV is demonstrated, with a temperature coefficient of 8.79 ppm/oC for the 0 to 125 °C range, while the power consumption of the whole circuit is 4.86 nW under a 0.9 V power supply at 27 oC. The estimated silicon area is 0.0012 mm2.
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