一种新型的CMOS亚阈值低功耗基准电压源

利用工作于亚阈值的NMOS器件,产生两个负温度系数的电压源,然后将两个电压源作差,产生稳定的基准电压输出.整体电路采用HJTCl80 nrn标准CM（）S工艺实现.仿真结果表明,基准源输出电压为220 mV,在一25℃到100℃的温度范围内的温度系数为68×10^-6/ C.电路的最小供电电压可低至O.7 V,在供电电压O.7～4V范围内的线性调整率为1.5 mV/V.无滤波电容时,1 kHz的电源抑制比为-56 dB室温下,1.O V电压供电时,电路总体功耗为3.7μW.版图设计后的芯片核心面积为O.02 mm².本文设计的电压源适用于低电压低功耗的条件.

A Novel Low-power Low-voltage Reference

A novel low-power low-voltage reference is developed utilizing△V_GS between sub threshold MOSFETs.It is implemented in HJTC 180 nm standard CMOS process.The proposed voltage reference generates two different V_GSs which have negative temperature coefficients and combines them to produce an output voltage with a nearly zero temperature coefficient.The resulting reference voltage is 220 mV with the temperature coefficient 68×10^-6/℃in the range of—25 C to 100 C The minimum supply voltage is 0.7 V and the simulated line regularity is 1.5 mV/ V with the supply range from 0.7～4 V.The PSRR is—56dB at 1 kHz and the power consumption is 3.7μW under 1.0 V at 300 K.The entire chip core area with the start up circuit is 0.02 mm2.This voltage reference is suitable for the low-power low-voltage applications.