Subpicoampere current source based on a digital-to-analog converter

Subpicoampere current source based on a digital-to-analog converter

A current source based on a voltage ramp generated by a 16-bit digital-to-analog converter and a differentiating capacitor has been developed in MIKES. The system is suitable for generating currents from 1 fA to 100 pA. Standard deviation of average dU/dt:s of 70 ramps during an overnight measuremen...

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Bibliographische Detailangaben
Hauptverfasser: Iisakka, I., Kalliomaki, K., Seppala, J., Manninen, A.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Cables
Capacitors
Digital-analog conversion
Measurement standards
Metrology
Microcontrollers
Stability
Timing
Uncertainty
Voltage
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Beschreibung
Zusammenfassung:A current source based on a voltage ramp generated by a 16-bit digital-to-analog converter and a differentiating capacitor has been developed in MIKES. The system is suitable for generating currents from 1 fA to 100 pA. Standard deviation of average dU/dt:s of 70 ramps during an overnight measurement is as low as 1 ppm.
ISSN:0589-1485
2160-0171
DOI:10.1109/CPEM.2008.4574798