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).Read full text (pdf)