Design of a Wide-Range and High-Precision Analog Front-End Circuit for Multi-Parameter Sensors
Open accessAbstract
This article presents a wide-range and high-precision analog front-end circuit for multi-parameter sensors that can handle sensor outputs of different types (R, C, V). A rail-to-rail baseline compensation method has been proposed, which further incorporates a fine offset elimination of 0.6 mV/step. Additionally, self-zeroing and correlated double-sampling techniques are integrated to reduce low-frequency noise and offset, prevent sensor signal saturation, and enhance the precision of the analog front-end circuit. By incorporating variable components in the sensor signal acquisition circuit and integrating them with the baseline compensation circuit, the applicability range of the sensor has been expanded (R: 7 Ω–1.7 MΩ, C: 50 fF–35 pF, V: 0.05–1.7 V). Test results show all interface circuits exhibit significant total conversion gains (C: 45 mV/fF, R: 14.5 mV/Ω, V: 144 V/V), achieving high precision. Meanwhile, a coefficient of determination (R2) greater than 0.998 indicates high conversion linearity of the circuit.
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References 29 · Cited by 5
- Authors
- Yang, Y., Li, Z., Liu, M., Liu, W., Li, Z., Hou, Y., Liu, X., Wang, X., & Liu, Y.
- Affiliations
- Chinese Academy of Sciences (CN)
- China Electric Power Research Institute (CN)
- Corresponding author
- Liu, Yu
- Venue
- Electronics
- Publisher
- MDPI AG
- Published
- 2023-07-05
- Volume
- 12
- Issue
- 13
- Pages
- 2962
- ISSN
- 2079-9292 (ISSN-L)
- OpenAlex
- W4383375940
- Cited by
- 5
- References
- 29
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 1
- FWCI
- 0.40
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Electronics (publishedVersion, cc-by)
- Funders
- State Grid Corporation of China (5700-202155453A-0-0-00)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Analog and Mixed-Signal Circuit Design
- Physical Sciences › Computer Science › Computer Networks and Communications › Sensor Technology and Measurement Systems
- Physical Sciences › Engineering › Biomedical Engineering › Advanced Sensor Technologies Research
- Keywords
- analog front-end, multi-parameter sensor, offset cancellation, correlated double sampling, low-frequency noise reduction, conversion gain, linearity
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