A High Order Curvature-Compensated Bandgap Voltage Reference with a Novel Error Amplifier

摘要

This paper presents a bandgap voltage reference (BGR), utilizing high order curvature-compensated technique with the temperature dependent resistor. Based on an improved error amplifier, -80 dB power supply rejection (PSR) @1 kHz is achieved without additional complicated circuits. The circuit is fabricated in a standard 0.18 mu m CMOS process, consuming 50 mu A at 25 degrees C with a supply voltage of 3.3 V. Simulation results show that the proposed BGR can achieve a temperature coefficient as low as 1.18 ppm/degrees C over the temperature range from -40 degrees C to 120 degrees C. Monte Carlo simulation and Experimental Results validate the design.