A 0.7-v, 192 Pa current reference with 0.51%/V line regulation for ultra-low power applications

Bhattacharjee, I. and Chowdary, Gajendranath (2020) A 0.7-v, 192 Pa current reference with 0.51%/V line regulation for ultra-low power applications. In: 52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020, 10 October 2020through 21 October 2020, Virtual, Online.

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Abstract

A 192 pA current reference is proposed for ultra-low-power applications. The sub-threshold design based circuit employs three-transistor-regulators to provide a CTAT (complimentary-to-absolute-temperature) source to gate voltage, to a PMOS device that minimizes the temperature variation of the reference current. Consistent performance across process variations is achieved through digital trimming and body bias control. A temperature coefficient (TC) of 542 ppm/ ◦C is attained at nominal process with a minimum and maximum TC of 350 ppm/ ◦C and 729 ppm/ ◦C, respectively, across all process corners. The circuit operates at a worst case minimum supply voltage of 700 mV and the power consumption is 1.06 nW at the nominal process and temperature. The same architecture is reused for a reference current of 87.7 nA, which improves the TC to 91.2 ppm/ ◦C. The circuit is designed in standard 0.18 µm CMOS technology. © 2020 IEEE

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IITH Creators:

IITH Creators	ORCiD
Chowdary, Gajendranath	https://orcid.org/0000-0002-5880-4023

Item Type:

Conference or Workshop Item (Paper)

Uncontrolled Keywords:

Body bias control; Consistent performance; Current reference; Reference currents; Sub-threshold design; Temperature coefficient; Temperature variation; Ultralow power application

Subjects:

Electrical Engineering

Divisions:

Department of Electrical Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

20 Oct 2022 13:35

Last Modified:

20 Oct 2022 13:35

URI:

http://raiithold.iith.ac.in/id/eprint/11013