Second-order compensated CMOS bandgap voltage reference
Ruzhang Li · Journal of Chongqing University of Posts and Telecommunications · 2009
A novel proposed second-order compensated CMOS bandgap voltage reference(BGR)is presented.The second-order temperature curvature compensation is accomplished effectively by the channel modulation effect of the MOSFET,and the specific qualifications of the second-order temperature curvature compensation are analyzed and given.The Cadence simulation results based on standard CMOS 0.35 μm technology show that the temperature coefficient of the first-order compensated BGR is 9.5 ppm/℃,while the proposed second-order compensated BGR has 2.7 ppm/℃ low temperature coefficient over the wide temperature range of-50° ～+120℃.