A bandgap voltage reference with high-order curvature compensation
Ruzhang Li · Journal of Chongqing University of Posts and Telecommunications · 2007
A bandgap voltage reference(BGR) with high-order curvature compensation is designed.Based on the BGR with first-order curvature compensation and using base-emitter voltage VBE's nonlinear dependence of temperature T,a voltage with temperature characteristic of k_1T+k_2TlnT is added to the first-order curvature compensated voltage.With the Cadence tools,the TSMC 0.35 μm technology and device models,single power supply of 3 V,the simulated temperature coefficient of first order curvature compensated BGR is 13 ppm/℃ over the wide temperature range of 50～150 ℃,while with high-order curvature compensation,the temperature coefficient of BGR is reduced to 3.1 ppm/℃.