DocumentCode
3480186
Title
A novel precision dc current source in the pA range
Author
Bergsten, Tobias ; Rydler, Karl-Erik ; Gunnarsson, Ove ; Eklund, Gunnar ; Tarasso, Valter
Author_Institution
Dept. of Meas. Technol., SP Tech. Res. Inst. of Sweden, Borås, Sweden
fYear
2010
fDate
13-18 June 2010
Firstpage
123
Lastpage
124
Abstract
We present a novel technique to generate an accurate dc current in the pA range. This source works by the charging of a capacitor using a voltage ramp with a precisely controlled slope. We generate this ramp with a precalculated Δ-Σ modulation sequence. The accuracy is limited by the voltage stability of the arbitrary wave generator used to generate the pattern.
Keywords
capacitors; constant current sources; delta-sigma modulation; electric current measurement; function generators; ramp generators; Δ-Σ modulation; DC current source; arbitrary wave generator; capacitor; delta-sigma modulation; pA range; voltage ramp; voltage stability; Capacitors; DC generators; Stability; Voltage control;
fLanguage
English
Publisher
ieee
Conference_Titel
Precision Electromagnetic Measurements (CPEM), 2010 Conference on
Conference_Location
Daejeon
Print_ISBN
978-1-4244-6795-2
Type
conf
DOI
10.1109/CPEM.2010.5544462
Filename
5544462
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