A CMOS Voltage Reference Based on V_(GS) and ΔV_(GS) in the Weak Inversion Region  

一种基于亚阈区V_(GS)和ΔV_(GS)的CMOS基准电压源电路(英文)

作　　者：夏晓娟[1] 谢亮[1] 孙伟锋[1] 

机构地区：[1]东南大学国家专用集成电路系统工程技术研究中心,南京210096

出　　处：《Journal of Semiconductors》2008年第8期1523-1528,共6页半导体学报（英文版）

摘　　要：A CMOS voltage reference, which is based on VGs and/x ΔGS in the weak inversion region, has been designed and implemented in standard 0.6μm CMOS technology. No diodes and parasitic bipolar junction transistors （BJTs） are used. The proposed voltage reference uses a current-mode topology by summing a PTAT current and a CTAT current into a re- sistor to generate the required reference voltage. It can also provide more than one reference voltage output, which is quite suitable for systems requiring many different reference voltages simultaneously. The occupied chip area is 0. 023mm^-2 . The operation supply voltage is from 2.5 to 6V, and the maximum supply current is 8.25μA. The designed three different out- puts are respectively about 203mV, 1.0V, and 2.05V at room temperature when the supply voltage is 4V. The circuit achieves a temperature coefficient of 31ppm/℃ in the temperature range of 0 to 100℃ and an average line regulation of ± 0. 203%/V. The voltage reference has been successfully applied in a white LED backlight driver chip.介绍了一种基于亚阈区VGS和ΔVGS的CMOS基准电压源电路,电路不采用二极管和三极管.电路采用正负温度系数电流叠加的原理,可以产生多个基准电压值的输出,适用于同时需要多个基准的电路系统中.所设计的电路在0.6μm CMOS工艺线上流水验证,芯片面积为0.023mm2.测试结果表明,电源电压为2.5~6V时,最大的电流为8.25μA;电源电压为4V时,常温下所获得的三个基准电压值为203mV,1.0V及2.05V.温度由0℃变化到100℃时,芯片的温度系数为31ppm/℃,平均的线性度为±0.203%/V.此电路结构已经成功应用于背光LED驱动电路中.

关 键 词：CMOS voltage reference CTAT current PTAT current temperature coefficient weak inversion region 

分 类 号：TN432[电子电信—微电子学与固体电子学]