Accurate Nanopower Supply-Insensitive CMOS Unit Vth Extractor and αVth Extractor with Continuous Variety

Jing WANG  Li DING  Qiang LI  Hirofumi SHINOHARA  Yasuaki INOUE  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E100-A   No.5   pp.1145-1155
Publication Date: 2017/05/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E100.A.1145
Type of Manuscript: PAPER
Category: VLSI Design Technology and CAD
analog VLSI,  CMOS,  nanopower circuits,  supply-insensitive,  Vth extractor,  

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In this paper, a nanopower supply-insensitive complementary metal-oxide-semiconductor (CMOS) unit threshold voltage (Vth) extractor circuit is proposed. It meets the contemporary industry demand for portable devices that operate with very low power consumption and small output sensitivity. An α times Vth (αVth) extractor is also described, in which α varies continuously. Both incremental and decremental αVth voltages are obtained. A post-layout simulation results using HSPICE with CMOS 0.18um process show that the proposed unit Vth extractor consumes 265nW of power given a 1.6V power supply. Sensitivity to temperature is 0.022%/°C ranging from 0°C to 100°C. Sensitivity to supply voltage is 0.027%/V.