A 1.02 ppm/°C Precision Bandgap Reference with High-order Curvature Compensation for Fluorescence Detection
Abstract
This paper presents a high precision bandgap reference using high-order curvature compensation to achieve good temperature coefficients over a wide operating range. The proposed compensation circuit employs currents with optimized temperature coefficients to minimize the temperature drift of the output voltage. The proposed bandgap reference is designed using a standard 0.18 μm CMOS process. The simulation results demonstrate that the proposed bandgap reference achieved a 1.02 ppm/°C from -40°C to 125°C with a supply voltage of 3.3 V. With the proposed high-order curvature compensation schemes, the bandgap reference circuit can achieve a start-up time of 7 μs and a 85.5 dB PSRR at 100 Hz. The reference voltage is 1.066 V with the precision line sensitivity (LS) of 0.011 %/V for supply voltages between 2 V and 5 V.
Bingjun Xiong
PhD Student
My research interests include circuit design of optical receivers and references.
Feng Yan
PhD Student
My research interests include circuit design of analog front end for biomedical applications and sensor interfaces.
Wenji Mo
Master’s Student
My research interests include circuit design of low-power RISC-V processors and self-powered SoCs.
Jian Guan
PhD Student
My research interests include the design of solar cells and energy harvesting circuits.
Jingjing Liu
Associate Professor
My research interests include low-power smart micro-sensor integrated circuit design, image sensors, biomedical sensors, and energy harvesting circuits.