›› 2012, Vol. 25 ›› Issue (8): 6-.

• Articles • Previous Articles     Next Articles

Design of a Low Temperature Float High Precision CMOS Bandgap Reference

 WANG Yu-Xing, CAO Xiao-Jun, JIANG Sheng-Yu, WU Jin   

  1. (1.Suntech V College,Wuxi College of Science and Technology,Wuxi 214028,China;
    2.Manufacturing Technology Division,Hynix Semiconductor China Ltd,Wuxi 214028,China;
    3.Wuxi Campus,Southeast University,Wuxi 214135,China)
  • Online:2012-08-15 Published:2012-08-28

Abstract:

Based on the basic principles of linear segmented compensation and the output branch structure of the internal temperature of negative feedback,this paper proposes a novel structure which is simple and adapts to high order compensation methods of different opening directions.It also designs a low temperature float high precision voltage reference circuit based on the current mirror structure.Simulation by the CSMC 0.35 μm CMOS process indicates this bandgap reference can reach a temperature coefficient of 2.84 ℃ from -40 to125 ℃.PSRR can reach -70.6 dB and -63.36 dB at 100 Hz and 10 kHz PSRR,respectively.When the power supply voltage is in the range 2~3 V,the voltage fluctuation value is 3 mV/V.The proposed BGR has good overall performance.

Key words: CMOS bandgap reference;low voltage;curvature compensation;temperature coefficient

CLC Number: 

  • TN432