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A Nano-Watt Dual-Output Subthreshold CMOS Voltage Reference
IEEE Open Journal of Circuits and Systems Pub Date : 2020-06-29 , DOI: 10.1109/ojcas.2020.3005546
Jie Lin , Lidan Wang , Yan Lu , Chenchang Zhan

A dual-output CMOS voltage reference is presented for ultra-low power applications that require two or more different voltage references. The $\text{V}_{\mathrm{ REF1}}$ is designed by employing the $\text{V}_{\mathrm{ TH}}$ difference between two devices to compensate the temperature coefficient (TC) of the thermal voltage. The $\text{V}_{\mathrm{ REF2}}$ is generated by feeding a current mirrored from the first reference voltage’s supply current into a diode-connected-transistor load. In such a way, two different voltage references can be generated in one compact and simple design to reduce the devices and chip area significantly, compared to two separate voltage references in a conventional design. Fabricated in a 0.18- ${\mu }\text{m}$ CMOS process, the proposed CMOS voltage reference can provide two references of 331.8 and 660.3 mV with variation coefficients of 0.53% and 0.42%, respectively. The average TCs of $\text{V}_{\mathrm{ REF1}}$ and $\text{V}_{\mathrm{ REF2}}$ for a temperature range of −40 to 125°C are measured as 41.7 and 24.5 ppm/°C, respectively. The line sensitivity (LS) of $\text{V}_{\mathrm{ REF1}}$ is 0.0505 %/V with 0.6-1.8 V supply, and the LS of $\text{V}_{\mathrm{ REF2}}$ is 0.114 %/V with 0.8-1.8 V supply. The measured results show a competitive power supply ripple rejection, and the power consumption is only 4.12 nW with 0.8-V minimum supply at 25°C, while the active area is 0.0108 mm 2 .

中文翻译:

纳瓦双输出亚阈值CMOS电压基准

针对需要两个或更多不同电压基准的超低功耗应用,提出了一种双输出CMOS电压基准。的 $ \ text {V} _ {\ mathrm {REF1}} $ 是通过采用 $ \ text {V} _ {\ mathrm {TH}} $ 两个设备之间的差异,以补偿热电压的温度系数(TC)。的 $ \ text {V} _ {\ mathrm {REF2}} $ 通过将从第一参考电压的电源电流镜像的电流馈入二极管连接的晶体管负载来产生电流。以这种方式,与常规设计中的两个单独的电压基准相比,可以在一种紧凑且简单的设计中生成两个不同的电压基准,以显着减小器件和芯片面积。以0.18- $ {\ mu} \ text {m} $ 在CMOS工艺中,建议的CMOS参考电压可以提供331.8 mV和660.3 mV的两个参考电压,其变化系数分别为0.53%和0.42%。的平均TC $ \ text {V} _ {\ mathrm {REF1}} $ $ \ text {V} _ {\ mathrm {REF2}} $ 在-40至125°C的温度范围内测得的温度分别为41.7和24.5 ppm /°C。的线灵敏度(LS) $ \ text {V} _ {\ mathrm {REF1}} $ 电源电压为0.6-1.8 V时为0.0505%/ V, $ \ text {V} _ {\ mathrm {REF2}} $ 电源电压为0.8-1.8 V时为0.114%/ V。测量结果显示出具有竞争力的电源纹波抑制性能,在25°C时最小功耗为0.8V的情况下功耗仅为4.12 nW,而有效面积为0.0108 mm 2
更新日期:2020-08-28
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