A 1-nW 95-ppm/◦C 260-mV startup-less bandgap-based voltage reference

Chowdary, Gajendranath and Kota, K. and Chatterjee, S. (2020) A 1-nW 95-ppm/◦C 260-mV startup-less bandgap-based voltage reference. In: Proceedings - IEEE International Symposium on Circuits and Systems, 10 October 2020 - 21 October 2020.

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Abstract

We present an ultra-low-power fractional bandgap-based voltage reference and a unique method of generating a small proportional-to-absolute-temperature (PTAT) current. The PTAT current is used to generate a BJT complementary-to-absolute-temperature (CTAT) voltage. We have achieved temperature compensation of the generated reference voltage by subtracting a sub-threshold MOS CTAT voltage from the BJT CTAT voltage. The difference between the two CTAT voltages is temperature stable from -50◦C to 85◦C with a mean variation of less than 95 ppm/◦C measured across chips, without any additional trim. The proposed technique eliminates the need for additional start-up circuitry, which is mandatory for conventional architectures. The 260-mV voltage reference designed in a 180-nm CMOS process has a measured line regulation of 0.23 %/V and consumes 1 nW at room temperature.

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IITH Creators:

IITH Creators	ORCiD
Chowdary, Gajendranath	UNSPECIFIED

Item Type:

Conference or Workshop Item (Paper)

Uncontrolled Keywords:

CMOS processs; Line regulation; Proportional to absolute temperature; Reference voltages; Temperature compensation; Temperature stable; Ultra low power; Voltage reference

Subjects:

Electrical Engineering

Divisions:

Department of Electrical Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

23 Jul 2021 07:05

Last Modified:

23 Jul 2021 07:05

URI:

http://raiithold.iith.ac.in/id/eprint/8490