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《Semiconductor Technology》 2010-05
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Sub-1×10~(-6)/℃ Low Voltage CMOS Bandgap Current Reference

Zhang Xinwang,Meng Haitao,Du Zhankun,Yan Yuepeng(Institute of Microelectronics of Chinese Academy of Sciences,Beijing 100029,China)  
A novel second-order curvature-compensation technology of CMOS bandgap current reference circuit is proposed.By adding an operational transconductance amplifier(OTA) to make current characteristics of bandgap reference circuit according to theory analysis,low temperature coefficient(TC) reference current was achieved.The circuit was designed with SMIC 0.13 μm standard CMOS technology,which worked at 1.2 V power voltage and consumes 0.045 mm2 areas.Simulation result shows that the TC of reference current is 0.5×10-6/℃ from-40 ℃ to 85 ℃.When power voltage is 1.1 V,circuit still works with 1 mV/V power voltage coefficient.
【Fund】: 国家高技术研究发展计划项目(2009AA12Z314)
【CateGory Index】: TN432
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