Romanian Journal of Information Science and Technology (ROMJIST)

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ROMJIST is a publication of Romanian Academy,
Section for Information Science and Technology

Editor – in – Chief:

Academician Dan Dascalu

Secretariate (office):
Adriana Apostol
Adress for correspondence: romjist@nano-link.net (after 1st of January, 2019)

Editing of the printed version: Mihaela Marian (Publishing House of the Romanian Academy, Bucharest)

Technical editor
of the on-line version:
Lucian Milea (University POLITEHNICA of Bucharest)

Sponsors:
• National Institute for R & D
in Microtechnologies
(IMT Bucharest), www.imt.ro
• Association for Generic
and Industrial Technologies (ASTEGI), www.astegi.ro

ROMJIST Volume 24, No. 2, 2021, pp. 143-160, Paper no. 685/2021
 

Madalina BONCU, Catalin BOTEZATU, Florin DRAGHICI
An algorithm-based method for accurate compensation of bandgap references over temperature

ABSTRACT: A curvature-compensated bandgap voltage reference circuit, with a high degree of temperature compensation, is designed and implemented in a 0.18μm CMOS technology. The accuracy of the circuit was obtained with the help of a software code, having the aim of calculating the necessary parameters. Thus, a newly design method, implemented in MATLAB® software, is proposed. The circuit is intended for integration within a voltage regulator with an adjustable output voltage. The bandgap circuit provides a reference voltage of 1.2V, for supply voltages between 1.65V and 3.6V, over a temperature range of -40ºC to 85ºC. The targeted TC is below 10 ppm/ºC for typical process parameters.

KEYWORDS: Bandgap Voltage Reference (BVR), Curvature compensation, Temperature coefficient (TC), Proportional To Absolute Temperature (PTAT), Complementary To Absolute Temperature (CTAT).

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