Accurate Nanopower Supply-Insensitive Cmos Unit V-Th Extractor And Alpha V-Th Extractor With Continuous Variety

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 alpha times Vth (alpha Vth) extractor is also described, in which alpha varies continuously. Both incremental and decremental alpha Vth voltages are obtained. A post-layout simulation results using HSPICE with CMOS 0.18 um process show that the proposed unit Vth extractor consumes 265nW of power given a 1.6V power supply. Sensitivity to temperature is 0.022%/degrees C ranging from 0 degrees C to 100 degrees C. Sensitivity to supply voltage is 0.027%/V.