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《Electronic Components and Materials》 2014-09
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Design of a low power consumption bandgap reference with curvature compensation

ZHANG Long;FENG Quanyuan;WANG Dan;Institute of Microelectronics, Southwest Jiaotong University;  
Based on UMC 0.25 μm BCD process, a low temperature drift bandgap reference with second order curvature compensation was designed. The prototype was implemented with traditional amplifier clamping. With a current proportional to the square of thermodynamic temperature added to the core of the reference, the second order curvature compensation was achieved. Simulation results show that under the power supply voltage of 4.5 V, and over the temperature range of –40 ℃ to 150 ℃, the output reference voltage ranges from 1.213 4 V to 1.215 3 V, with a temperature coefficient about 1×10–5 V/℃; When the power supply voltage changes within the range of 2.5 V to 5.0 V, LR of VREF is 0.006 95%, with a low frequency power supply rejection ratio of –70 dB, whole quiescent current is only 20.1 μA.
【Fund】: 国家自然科学基金资助项目(No.61271090);; 国家高技术研究发展计划(863计划)重大资助项目(No.2012AA012305)
【CateGory Index】: TN402
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