An Enhanced-Precision Bandgap Reference Incorporating Temperature-Compensation
Tianzi Xiang, Quanyuan Xu, Haorui Liu, Ying Lu · 2024
In this work, an Enhanced-Precision Bandgap Reference Incorporating Temperature-Compensation was proposed. Unlike traditional bandgap references, the reference voltage output of 0.701 V is realized by combining reference current and resistor. Meanwhile, an innovative Linear-piecewise current compensation was proposed, which aimed at optimizing the temperature drift of the bandgap reference. The simulation results shows that the proposed curvature-compensation technique improves the TC from 24.96 to 2.14$\text{ppm}/^{\circ}\mathrm{C}$in the temperature range of$-40 \ {}^{\circ}\mathrm{C}$to$120 \ {}^{\circ}\mathrm{C}$; the PSRR of Enhanced-Precision Bandgap Reference at low frequency is 72.40 dB; the line regulation is about 0.08 %/V for input voltages between 3.2 and 3.7 V in standard 0.18 μm 1P6M CMOS process. The proposal of this new circuit provides a new idea for the realization of high- performance integrated circuits in the future.