2007•Journal of SemiconductorsRequires access

A Near-1V 10ppm/℃ CMOS Bandgap Reference with Curvature Compensation

Xing Xinpeng, LI Dong-mei, Zhihua Wang

Abstract

A low voltage bandgap reference with curvature compensation is presented.Using current mode structure,the proposed bandgap circuit has a minimum voltage of 900mV.Compensated through the VEB linearization technique,this bandgap reference can reach a temperature coefficient of 10ppm/℃ from 0 to 150℃.With a 1.1V supply voltage,the supply current is 43μA and the PSRR is 55dB at DC frequency.This bandgap reference has been verified in a UMC 0.18μm mixed mode CMOS technology and occupies 0.186mm2 of chip area.

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Key concepts: Bandgap voltage reference, Power supply rejection ratio, CMOS, Voltage reference, Band gap, Voltage, Linearization, Compensation (psychology)