Techniques for traceable measurements of small currents

被引：13

作者：

Callegaro, Luca ^{[1
]}

D'Elia, Vincenzo ^{[1
]}

Capra, Pier Paolo ^{[1
]}

Sosso, Andrea ^{[1
]}

机构：

[1] Ist Nazl Ric Metrol, INRIM, I-10135 Turin, Italy

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2007年 / 56卷 / 02期

关键词：

calibration; current measurement; signal generators;

D O I：

10.1109/TIM.2007.890800

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The Italian national standard of direct current is being extended down to the femtoampere range. Two current sources have been developed. The first one, working in the 100 pA to 100 fA range, is based on a low-frequency trapezoidal wave generator, measured with a sampling digital voltmeter at regular time intervals, which charges and discharges a gas-dielectric capacitor. The second, working in the 10-mu A to 10-pA range, makes use of a calibrated resistor to generate a known current. Current is traceable to national standards of voltage, resistance or capacitance, and frequency.

引用

页码：295 / 299

页数：5

共 9 条

[1]

CALLEGARO L, 2006, P IMTC, P955

[2] Voltage-burden induced errors in the detection of bridge balance [J].