This paper presents a low-voltage and low-power CMOS precision current reference circuit, which leads to high current stability to temperature and supply variation. By exploiting the dependence of the threshold voltage and its temperature characteristics on the transistor size, a new temperature compensation method is proposed to greatly improve the temperature stability of current references and reduce its area. In addition, a novel topology is proposed to drastically enhance the supply voltage stability of current references and further improve its temperature stability. Based on a 0.18 μm standard CMOS process, post-layout simulation results show that the proposed design achieves a mean temperature coefficient (TC) of 15.71 ppm/^oC over the temperature range of −20 °C to 120 °C at a 0.6 V supply voltage. The line regulation (LR) is 0.04%/V over the supply voltage range from 0.6 V to 1.8 V at 27 °C. The power consumption is 207 nW at a 0.6 V supply voltage, and the active area is 0.00808 mm².

本文提出了一种低压低功耗CMOS精密电流基准电路，该电路可提高电流对温度和电源变化的稳定性。通过利用阈值电压及其温度特性对晶体管尺寸的依赖性，提出了一种新的温度补偿方法，以大大提高电流基准的温度稳定性并减小其面积。此外，提出了一种新颖的拓扑结构，可以大大提高电流基准的电源电压稳定性，并进一步提高其温度稳定性。基于0.18μm标准CMOS工艺，版图后仿真结果表明，所提出的设计实现了15.71 ppm / ^o的平均温度系数（TC）电源电压为0.6 V时，温度范围为-20°C至120°C。在27°C的0.6 V至1.8 V的电源电压范围内，线路调节（LR）为0.04％/ V。电源电压为0.6 V时，功耗为207 n W，有效面积为0.00808 mm ²。