Reference Ultralow DC Current Source Between 1 fA and 100 pA at TÜBİTAK UME

@article{Erkan2019ReferenceUD,
  title={Reference Ultralow DC Current Source Between 1 fA and 100 pA at T{\"U}BİTAK UME},
  author={\&\#x00D6;mer Erkan and Yakup G\&\#x00FC;lmez and Cem Hay\&\#x0131;rl\&\#x0131; and G\&\#x00FC;lay G\&\#x00FC;lmez and Enis Turhan},
  journal={IEEE Transactions on Instrumentation and Measurement},
  year={2019},
  volume={68},
  pages={2201-2207}
}
In this paper, we present a programmable ultralow dc current source developed at TÜBİTAK UME. The output current range is from 1 fA to 100 pA with 100 aA resolution and is directly traceable to dc voltage, capacitance, and time units. The principle of the device is based on applying a linear ramp voltage on standard capacitors with values between 1 and 1000 pF. These standard capacitors are commercial standard capacitors which are kept in a temperature controlled insulated box. Linear ramp… 

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