Quasi-Balance Four-Terminal Resistance Bridge

Author

Lei Lai ; Jian Feng ; Leibing Shi

Author_Institution

Shanghai Inst. of Meas. & Testing Technol., Shanghai, China

Volume

64

Issue

6

fYear

2015

fDate

Jun-15

Firstpage

1636

Lastpage

1641

Abstract

A kind of quasi-balance four-terminal ac resistance bridge has been constructed. The electronic inductive voltage divider provides high accurate voltage ratios for the bridge at a wide frequency range from 20 Hz to 10 kHz. The Wagner network with electronic circuit containing followers and amplifiers makes the voltage ratio unaffected by internal loading of ratio winding. Amplifiers are used to eliminate voltage drop on the lead wire connecting two resistors. Sampling method is used to measure the complex voltage ratio. The bridge can measure resistances from 1 Ω to 1 MΩ. The optimal uncertainty for resistance of 100 Ω and 1 kΩ is 2 × 10^-7 at 1 kHz.

Keywords

bridge circuits; electric resistance measurement; operational amplifiers; resistors; sampling methods; voltage dividers; Wagner network; amplifier; electronic circuit; electronic inductive voltage divider; frequency 1 kHz; frequency 20 Hz to 10 kHz; lead wire; quasi-balance four terminal ac resistance bridge; ratio winding; resistance 1 kohm; resistance 1 ohm to 1 Mohm; resistance 100 ohm; resistance measurement; resistors; sampling method; voltage follower; voltage ratio measurement; Bridge circuits; Electrical resistance measurement; Lead; Resistance; Resistors; Voltage measurement; Wires; Bridge circuits; impedance measurement; lead voltage elimination; quasi-balance; resistance measurement; sampling method; voltage dividers; voltage dividers.;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2015.2408792

Filename

7086077