A 0.4-V Supply Curvature-Corrected Reference Generator With 84.5-ppm/°C Average Temperature Coefficient Within −40 °C to 130 °C

This brief describes a low-power current-mode voltage reference based on subthreshold transistors. A novel circuit configuration together with a high-order temperature compensation scheme allow this voltage reference to operate with a supply voltage down to 0.4 V over a large temperature range (from −40 °C to 130 °C). The circuit, which is fabricated with a standard 0.18- <inline-formula> <tex-math notation="LaTeX">$\mu\text{m}$</tex-math></inline-formula> CMOS technology, provides an output voltage of 212 mV, while consuming 192 nW. The measured average temperature coefficient is 84.5 ppm/°C.

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