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《Semiconductor Technology》 2007-11
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Design of a High PSRR Bandgap Voltage Reference

ZENG Jian-ping1,ZOU Wei-hua1,YI Feng2,TIAN Tao1 (1.College of Physics and Microelectronic Science,Hunan University,Changsha 410082,China;2.The 58th Institute,CETC,Wuxi 214035,China)  
A high PSRR with low temperature coefficient CMOS band gap reference was presented,in which 0.25 μm CMOS model was used.In the design,the cascade current mirror was used in the circuit,the output of the OPAMP was used as the biases of itself and the next stage,and PTAT temperature compensate was realized.SMIC 0.25 μm double poly triple metal mixture signal model and Hspice tool were used for simulation.The simulation results show that the output voltage is with 9.3×10-6 V/℃ temperature rate and PSRR is more than 85 dB,the Vref swing is less than 0.12 mV at-25 ℃ to 125 ℃ and the supply voltage range is 4.5-5.5 V.The total current consumption of power supply is less than 20 μA.
【CateGory Index】: TN432
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