High-resolution auto-balancing wheatstone-bridge with successive approximation of Δ Σ-Modulated digitally controlled variable resistor

Takumi Miyazaki; Shuya Nakagawa; Hiroki Ishikuro

doi:10.1109/ICECS46596.2019.8965187

High-resolution auto-balancing wheatstone-bridge with successive approximation of Δ Σ-Modulated digitally controlled variable resistor

Takumi Miyazaki, Shuya Nakagawa, Hiroki Ishikuro

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

This paper describes a high-resolution, highly linear, low power amp-less sensor interface. A Wheatstone-bridge with ΔΣ-modulated digitally controlled variable resistor is proposed. The proposed bridge is automatically balanced by successive approximation (SA) of the digitally controlled resistor, which can eliminate power consuming amplifiers and ADCs. To overcome conversion speed limitation caused by settling time of each SA step, the output differential voltage of the bridge is shorted in advance to the comparison phase of each SA step. A developed prototype system achieved 9.68 bit resolution in target resistance range of three orders of magnitude and conversion speed improvement by 66%.

Original language	English
Title of host publication	2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	474-477
Number of pages	4
ISBN (Electronic)	9781728109961
DOIs	https://doi.org/10.1109/ICECS46596.2019.8965187
Publication status	Published - 2019 Nov
Event	26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019 - Genoa, Italy Duration: 2019 Nov 27 → 2019 Nov 29

Publication series

Name	2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019

Conference

Conference	26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019
Country	Italy
City	Genoa
Period	19/11/27 → 19/11/29

Keywords

Auto-balancing
IoT
Sensor interface
Successive approximation
Wheatstone-bridge
ΔΣ-modulation

ASJC Scopus subject areas

Electrical and Electronic Engineering
Control and Optimization
Computer Networks and Communications
Hardware and Architecture

Access to Document

10.1109/ICECS46596.2019.8965187

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Cite this

Miyazaki, T., Nakagawa, S., & Ishikuro, H. (2019). High-resolution auto-balancing wheatstone-bridge with successive approximation of Δ Σ-Modulated digitally controlled variable resistor. In 2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019 (pp. 474-477). [8965187] (2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICECS46596.2019.8965187

High-resolution auto-balancing wheatstone-bridge with successive approximation of Δ Σ-Modulated digitally controlled variable resistor. / Miyazaki, Takumi; Nakagawa, Shuya; Ishikuro, Hiroki.

2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019. Institute of Electrical and Electronics Engineers Inc., 2019. p. 474-477 8965187 (2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Miyazaki, T, Nakagawa, S & Ishikuro, H 2019, High-resolution auto-balancing wheatstone-bridge with successive approximation of Δ Σ-Modulated digitally controlled variable resistor. in 2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019., 8965187, 2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019, Institute of Electrical and Electronics Engineers Inc., pp. 474-477, 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019, Genoa, Italy, 19/11/27. https://doi.org/10.1109/ICECS46596.2019.8965187

Miyazaki T, Nakagawa S, Ishikuro H. High-resolution auto-balancing wheatstone-bridge with successive approximation of Δ Σ-Modulated digitally controlled variable resistor. In 2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019. Institute of Electrical and Electronics Engineers Inc. 2019. p. 474-477. 8965187. (2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019). https://doi.org/10.1109/ICECS46596.2019.8965187

Miyazaki, Takumi ; Nakagawa, Shuya ; Ishikuro, Hiroki. / High-resolution auto-balancing wheatstone-bridge with successive approximation of Δ Σ-Modulated digitally controlled variable resistor. 2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019. Institute of Electrical and Electronics Engineers Inc., 2019. pp. 474-477 (2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019).

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