A 10 a high-precision DC current source with stability better than 0.1 ppm for evaluating high-current meter

Author

Nong Wang ; Zhengkun Li ; Qing He ; Zhonghua Zhang ; Bing Han ; Yunfeng Lu

Author_Institution

Harbin Inst. of Technol., Harbin, China

fYear

2014

fDate

24-29 Aug. 2014

Firstpage

248

Lastpage

249

Abstract

The principle and structure of a 10 A high stable DC current source is described. Factors determining the current stability are analyzed and the crucial components including the voltage reference, sample resistor, error amplifier and regulator are elaborately selected to guarantee the current stability. Reasons for oscillation and frequency compensation methods are discussed. The best measurement results show that the relative drift and the relative standard deviation of the current in one hour are about 5.9×10^-8 and 9.3×10^-8 respectively, and the same characteristics in 10 minutes are about 8.2×10^-9 and 4.9×10^-8 respectively.

Keywords

amplifiers; compensation; constant current sources; electric current measurement; measurement standards; oscillations; resistors; DC current source; current 10 A; current stability determination; error amplifier; frequency compensation method; oscillation; regulator; relative drift; relative standard deviation; sample resistor; voltage reference; Circuit stability; Oscillators; Regulators; Resistors; Stability criteria; Temperature measurement; Current source; current supply; high-current meter; standard current; voltage reference;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on

Conference_Location

Rio de Janeiro

ISSN

0589-1485

Print_ISBN

978-1-4799-5205-2

Type

conf

DOI

10.1109/CPEM.2014.6898352

Filename

6898352