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

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, −80dB power supply rejection (PSR) @1kHz is achieved without additional complicated circuits. The circuit is fabricated in a standard 0.18μm CMOS process, consuming 50μA at 25∘C with a supply voltage of 3.3V. Simulation results show that the proposed BGR can achieve a temperature coefficient as low as 1.18ppm/∘C over the temperature range from −40∘C to 120∘C. Monte Carlo simulation and Experimental Results validate the design.