Abstract

The bandgap reference circuit is widely used in analog, digital, and various other circuits. However, achieving low noise and power consumption presents challenges. Process variations can cause fluctuations in output voltage. This paper employs resistance trim to correct process-related errors, ensuring precise output voltage. VBE linearization compensation minimizes temperature drift. Simulation results show temperature drift below 10 ppm/°C within -45°C to 125°C. For the operational amplifier, a folded cascode current mirror and chopper structure achieve high gain and low power consumption, which eliminates low-frequency noise. The amplifier draws around 7 uA at 1.8 V, with a gain of about 84 dB, a Gain-Bandwidth Product of 229 kHz, and an output voltage noise of 257.04 nV/√Hz at 10 Hz. The entire circuit operates at 1.8 V, consuming 20.26 uA, with an output voltage noise of 5.38 uV/√Hz at 10 Hz.

Details

Title
A low power and low noise bandgap reference design
Author
Yang, Jiale; Jiang, Yan; Zhang, Jing; Wei, Shuhua
First page
012026
Publication year
2024
Publication date
Jul 2024
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1088/1742-6596/2810/1/012026
ProQuest document ID
3091148308
Copyright
Published under licence by IOP Publishing Ltd. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.