摘要
提出了一种新颖的CMOS带隙基准电流源的二阶曲率补偿技术,通过增加一个运算跨导放大器(OTA),使带隙基准参考电路的电流特性与理论分析相符合,实现低温度系数(TC)的参考电流。该电路采用SMIC0.13μm标准CMOS工艺,可在1.2 V的电源电压下工作,有效面积为0.045 mm2。仿真结果表明,在-40~85℃温度范围内参考电流的温度系数为0.5×10-6/℃;当电源电压为1.1 V时,电路依然可以正常工作,电源电压调整率为1 mV/V。
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 mm^2 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.
出处
《半导体技术》
CAS
CSCD
北大核心
2010年第5期485-488,共4页
Semiconductor Technology
基金
国家高技术研究发展计划项目(2009AA12Z314)
关键词
带隙基准电流源
温度系数
二阶曲率补偿
电源电压调整率
bandgap current reference
temperature coefficient(TC)
second-order curvature-compensation
power voltage coefficient