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Graf P, Flebbe M, Utzat D, et al. Electrometer with sub-attoampere current load. Rev Sci Instrum. 2017;88(8):084702doi: 10.1063/1.4998979.
Graf, P., Flebbe, M., Utzat, D., Nienhaus, H., & Möller, R. (2017). Electrometer with sub-attoampere current load. The Review of scientific instruments, 88(8), 084702. https://doi.org/10.1063/1.4998979
Graf, Paul, et al. "Electrometer with sub-attoampere current load." The Review of scientific instruments vol. 88,8 (2017): 084702. doi: https://doi.org/10.1063/1.4998979
Graf P, Flebbe M, Utzat D, Nienhaus H, Möller R. Electrometer with sub-attoampere current load. Rev Sci Instrum. 2017 Aug;88(8):084702. doi: 10.1063/1.4998979. PMID: 28863669.
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Rev Sci Instrum. 2017 Aug;88(8):084702. doi: 10.1063/1.4998979.

Electrometer with sub-attoampere current load.

The Review of scientific instruments

Paul Graf, Meike Flebbe, Detlef Utzat, Hermann Nienhaus, Rolf Möller

Affiliations

  1. Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstr. 1-21, 47048 Duisburg, Germany.

PMID: 28863669 DOI: 10.1063/1.4998979

Abstract

By cooling a conventional junction field-effect transistor below 150 K, a simple and versatile electrometer with extremely high impedance can be realized. At operating condition, the leakage current to the gate amounts to a few hundredths of an attoampere. The electrometer can be used from DC up to a frequency of 10 kHz. Without reduction of the bandwidth, a sensitivity of a few μV is obtained. Working at low frequencies, currents as low as a few attoamperes can be detected. If the input voltage is out of the operational range, the forward current or the Zener current of the gate junction protects the transistor against destructive charging.

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