Piecewise Curvature-Corrected Bandgap Reference in 90 nm CMOS

Author(s):

P R Pournima , BNMIT

Keywords:

Bandgap reference (BGR), Curvature-correction, Piecewise nonlinear, Power Supply Rejection(PSR), Rail-to-Rail, Temperature Coefficient (TC).

Abstract:

A piecewise curvature-corrected CMOS bandgap reference (BGR) is proposed. It features in utilizing piecewise nonlinear curvature-corrected current and rail-to-rail operational amplifier to a conventional first-order current-mode BGR. The corrected current is zero, exponential with temperature and proportional to the squared temperature in the lower, middle and higher temperature range (TR). The rail-to-rail operational amplifier biased by a current proportional to absolute temperature (PTAT) helps to provide negative feedback for the proposed BGR. Measured results indicate that the proposed BGR achieves temperature coefficient (TC) of 3.72 ppm/ 0C in the TR of -75 0C to +150 0C without trimming, power supply rejection (PSR) of -58 dB and line regulation of 2.4 mV/V in the voltage supply of 1.2 V. It is fabricated in 90 nm CMOS process with power consumption of 36 uW and effective chip area of 0.2 mm2 . The physical design was carried out using Virtuoso tools for Custom IC design and physical verification with Assura toolset from Cadence®

Other Details:

Manuscript Id	:	IJSTEV1I2015
Published in	:	Volume : 1, Issue : 2
Publication Date	:	01/09/2014
Page(s)	:	29-37

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