Publication: Design of bandgap reference circuit using 180nm tsmc cmos process technology for automotive applications
Loading...
Date
2023-08
Authors
Lim, Xiao Xuan
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
As integrated circuits develop in automotive applications, a reference voltagesource which is stable across variation in process, voltage, and temperature (PVT) are getting more important. Not only for stand-alone integrated circuits references, bandgap reference (BGR) circuits can also be used within the design of other linear ICs such as analog-to-digital converter (ADC) and digital-to-analog converter (DAC). Previous works on designing BGR circuits have their own strength as well as limitations. Although some of the works obtained a small reference voltage, their temperature coefficient or supply voltage is high. A point in this is that a low power supply is essential for low power consumption of circuits. This work presented detailed analyses and review on the BGR circuit for automotive applications. A BGR circuit is designed and implemented using 180nm TSMC CMOS process technology. The proposed circuit is built up by a bandgap core, two-stage operational amplifier, start up circuit, and compensation block which uses the combination of proportional-to absolute temperature (PTAT) and complementary-to-absolute temperature (CTAT). This work also emphasizes practical understanding of the limitations of performance and the design of the bandgap reference circuit. In this work, the proposed BGR circuit has achieved a reference voltage of 432.27 mV with a temperature coefficient of 14.58
ppm/˚C and power dissipation of 82.06 nW. The results also present a good line regulation performance of 7.73%. From the Monte Carlo analysis, the mean reference voltage of the proposed BGR circuit with temperature variation of -40˚C to 125˚C is 441.47 mV with standard deviation of 0.72 mV. Besides, for the supply voltage variation from 0.8 V to 1.5 V, the mean output reference voltage is 441.56 mV with standard deviation of 0.85 mV. The simulation results indicate that the proposed BGR circuit has achieved the design specifications and has good performance with low temperature coefficient as well as power dissipation across a wide range of temperature suitable for automotive applications.