| Title: |
A Versatile Loop-Compensated Interface for Nonlinear Resistive Sensor Bridges Applied to Linearized Thermistor Temperature Sensing |
| Authors: |
Thomaskutty Mathew; Nani Simhadri; Anoop Chandrika Sreekantan; Vineeth Bala Sukumaran |
| Source: |
IEEE Open Journal of Instrumentation and Measurement, Vol 4, Pp 1-10 (2025) |
| Publisher Information: |
IEEE, 2025. |
| Publication Year: |
2025 |
| Collection: |
LCC:Instruments and machines; LCC:Electrical engineering. Electronics. Nuclear engineering |
| Subject Terms: |
Linearization; loop compensation (LC); magneto-resistive (MR) sensors; nonlinear sensors; optimization; resistive sensor bridges; Instruments and machines; QA71-90; Electrical engineering. Electronics. Nuclear engineering; TK1-9971 |
| Description: |
Resistive sensors are commonly available in bridge configurations. This article presents a versatile interfacing circuit topology suitable for various types of resistive sensor bridges exhibiting nonlinear output characteristics. The proposed topology employs an electronic loop compensation approach capable of operating in single-mode or dual-mode configurations. In addition to the sensor bridge, the core elements of the loop include a two-stage instrumentation amplifier and a novel switching logic. The circuit can accommodate different bridge types—including single-element, special dual-element, and thermistor-based sensor bridges—and produces an output that varies proportionally with the sensed variable. The innovative switching logic minimizes the influence of switching resistance on the output, thereby enhancing the measurement accuracy. The thermistor-based interface involves an optimization method using an evolutionary algorithm-based technique. This study considers various practical constraints, such as maintaining sufficient sensitivity and limiting the self-heating errors. The prominent error sources are analyzed and quantified. The performance evaluation of the developed scheme was tested in simulation, emulation, and experimental studies (using a commercial thermistor). The proposed topology provides a close to linear output characteristic on interfacing with a thermistor. The associated nonlinearity is 0.48% over $0~^{\circ } $ C to $120~^{\circ } $ C range, with a reasonable sensitivity of 23.5 mV/°C. Finally, a quantitative analysis of the developed scheme is conducted among recent loop compensator-based sensor linearizers. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2768-7236 |
| Relation: |
https://ieeexplore.ieee.org/document/11271628/; https://doaj.org/toc/2768-7236 |
| DOI: |
10.1109/OJIM.2025.3638916 |
| Access URL: |
https://doaj.org/article/69c8d9fd39ea4cf1b89a3cf613ad584c |
| Accession Number: |
edsdoj.69c8d9fd39ea4cf1b89a3cf613ad584c |
| Database: |
Directory of Open Access Journals |