A Curvature Compensated CMOS Bandgap Voltage Reference With 6.8 ppm/°C Temperature Coefficient and Low Quiescent Current

This paper presents a fully MOS current-mode curvature compensated bandgap voltage reference. A new method has been proposed for Complementary-To-AbsoluteTemperature voltage generation. In addition, temperature compensation with curvature correction has been carried out. The bandgap reference circuit has been simulated in the 0.18 $\mu\mathrm{m}$ CMOS process. The simulation results demonstrate that the new BGR produces a $1.18\mathrm{~V}$ reference voltage with ultralow current consumption of $2.19\mu\mathrm{A}$. The temperature coefficient is almost equal to $6.8 \mathrm{ppm} /{ }^{\circ} \mathrm{C}$ and the PSR is $-68\mathrm{~dB}$ at 1MHz offset.