A Simple and Compact Transimpedance Mode dc Bridge Readout

Last modified: June 29, 2021
Estimated reading time: 1 min
Research Article: A Simple and Compact Transimpedance Mode dc Bridge Readout
Author: Seangrawee Buakaew, Wipavan Narksarp & Chariya Wongtaychatham
Email: wipavan.nar@siam.edu
Department/Faculty: Faculty of Engineering in Electrical, Siam University, Bangkok 10160
Published/แหล่งเผยแพร่: The 7th International Conference on Engineering, Applied Sciences and Technology (ICEAST2021), April 1 – 3, 2021, King Mongkut’s Institute of Technology Ladkrabang

Citation

Seangrawee Buakaew, Wipavan Narksarp & Chariya Wongtaychatham. (2021). A simple and compact transimpedance mode dc bridge readout. In The 7th International Conference on Engineering, Applied Sciences and Technology (ICEAST2021) (page 121-124). (online conference). Bangkok: King Mongkut’s Institute of Technology Ladkrabang.


ABSTRACT

This paper presents a new circuit configuration of a transimpedance mode dc bridge based on an operational trans-resistance amplifier (OTRA) as analog building block. The proposed circuit suits for small changing resistance detector.  By taking the benefit of grounding property at the internal input port of the OTRA, a simple and compact dc bridge is obtained. The proposed circuit composes of two sensing components together with a feedback resistor and only one operational trans-resistance amplifier. The circuit performances are verified by the PSPICE simulation using 0.35 μm CMOS technology model parameters. The simulation results from circuit level agree well with the theoretical values.

Keywords:  Bridge, Mixed mode, Operational trans-resistance amplifier, Analog circuit.


A Simple and Compact Transimpedance Mode dc Bridge Readout

Faculty of Engineering, Siam University, Bangkok, Thailand

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