Title :
Subpicoampere current source based on a digital-to-analog converter
Author :
Iisakka, I. ; Kalliomaki, K. ; Seppala, J. ; Manninen, A.
Author_Institution :
Centre for Metrol. & Accreditation (MIKES), Espoo
Abstract :
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.
Keywords :
capacitors; digital-analogue conversion; 16-bit digital-to-analog converter; MIKES; current 1 fA to 100 pA; differentiating capacitor; standard deviation; subpicoampere current source; voltage ramp; Cables; Capacitors; Digital-analog conversion; Measurement standards; Metrology; Microcontrollers; Stability; Timing; Uncertainty; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574798
