Temperature independent Current reference circuit
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Date
2023
Authors
Journal Title
Journal ISSN
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Publisher
Institute of Electrical and Electronics Engineers Inc.
Abstract
A constant current reference circuit that is independent of temperature is proposed in this paper. This circuit is derived from two circuit blocks having opposite temperature coefficients (TC). A conventional Beta multiplier circuit which generates a proportional to absolute temperature (PTAT) current and a proposed complementary to absolute temperature (CTAT) current circuit are used to generate a constant current that is independent of temperature. The circuit exhibits a very low temperature coefficient of 62.97 ppm/oC. This circuit can be used to generate flexible values of constant current in a temperature range of 10 to 80 C with a 1.8 V supply voltage. Proposed design is validated using Cadence Virtuoso tool with a 180nm standard CMOS process. © 2023 IEEE.
Description
Keywords
Constant reference current, CTAT, PTAT, PVT variations
Citation
2023 IEEE International Conference on Distributed Computing, VLSI, Electrical Circuits and Robotics, DISCOVER 2023, 2023, Vol., , p. 61-64