Self-balancing DC bridge circuits using resistive mirror based voltage controlled resistors

Author

Tadic, Niksa ; Gobovic, Desa

Author_Institution

Dept. of Electr. Eng., Univ. of Montenegro, Yugoslavia

Volume

3

fYear

2000

fDate

2000

Firstpage

1176

Abstract

Two types of self-balancing DC bridge (SBDCB) circuits using resistive mirror-based voltage controlled resistors (RMBVCRs) instead of the classical electromechanical trimming resistors have been designed. The proposed SBDCBs are the first designs reported in the literature that employ the semiconductor controlled resistors. These bridge circuits have constant currents in their resistive branches. One of the SBDCBs has the variable supply voltage, whereas the other has the constant supply voltage. The bridges are automatically balanced with the output voltage directly proportional to the measured resistance. The behaviours of the proposed circuits have been verified by experiment. The maximal relative error of the proposed SBDCB circuit is less than 0.05% in the measured resistance range from 0.3 kΩ to 300 kΩ

Keywords

bridge circuits; bridge instruments; linear network analysis; resistors; 0.3 kΩ to 300 kΩ; 0.3 to 300 kohm; constant supply voltage; maximal relative error; measured resistance range; output voltage; resistive mirror; self-balancing DC bridge circuits; variable supply voltage; voltage controlled resistors; Automatic control; Bridge circuits; Electric variables control; Electrical resistance measurement; Immune system; Interference; Mechanical variables control; Mirrors; Resistors; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2000. IMTC 2000. Proceedings of the 17th IEEE

Conference_Location

Baltimore, MD

ISSN

1091-5281

Print_ISBN

0-7803-5890-2

Type

conf

DOI

10.1109/IMTC.2000.848664

Filename

848664