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Accurate Subpicoampere Current Source Based on a Differentiating Capacitor With Software-Controlled Nonlinearity Compensation.
- Source :
-
IEEE Transactions on Instrumentation & Measurement . Apr2005, Vol. 54 Issue 2, p554-558. 5p. - Publication Year :
- 2005
-
Abstract
- A high accuracy current source has been developed for the generation of very small currents (below 200 pA) based on applying a linear voltage ramp to a capacitor. Using software-controlled compensation for the nonlinearity of the voltage ramp, a stable current can be reached within a few seconds. A voltage ramp within typically 10.10-6 of any desired value between less than 1 mV/s and several hundreds of mV/s can be realized. Using a high quality air-dielectric capacitor, currents below 200 pA can be generated With an uncertainty of 20 μA/A (k = 2), with a lower limit 0f 2.0 aA (k=2). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189456
- Volume :
- 54
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Instrumentation & Measurement
- Publication Type :
- Academic Journal
- Accession number :
- 16592255
- Full Text :
- https://doi.org/10.1109/TIM.2004.843127