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ŠTUBIAN, M. BOBEK, J. SETVÍN, M. DIEBOLD, U. SCHMID, M.
Originální název
Fast low-noise transimpedance amplifier for scanning tunneling microscopy and beyond
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
A transimpedance amplifier has been designed for scanning tunneling microscopy (STM). The amplifier features low noise (limited by the Johnson noise of the 1 G Omega feedback resistor at low input current and low frequencies), sufficient bandwidth for most STM applications (50 kHz at 35 pF input capacitance), a large dynamic range (0.1 pA-50 nA without range switching), and a low input voltage offset. The amplifier is also suited for placing its first stage into the cryostat of a low-temperature STM, minimizing the input capacitance and reducing the Johnson noise of the feedback resistor. The amplifier may also find applications for specimen current imaging and electron-beam-induced current measurements in scanning electron microscopy and as a photodiode amplifier with a large dynamic range. This paper also discusses the sources of noise including the often neglected effect of non-balanced input impedance of operational amplifiers and describes how to accurately measure and adjust the frequency response of low-current transimpedance amplifiers.
Klíčová slova
THERMAL NOISE; SINGLE ATOMS; GATE NOISE; BANDWIDTH; PREAMPLIFIER; SURFACE
Autoři
ŠTUBIAN, M.; BOBEK, J.; SETVÍN, M.; DIEBOLD, U.; SCHMID, M.
Vydáno
1. 7. 2020
Nakladatel
AMER INST PHYSICS
Místo
MELVILLE
ISSN
0034-6748
Periodikum
Review of Scientific Instruments
Ročník
91
Číslo
7
Stát
Spojené státy americké
Strany od
1
Strany do
11
Strany počet
URL
https://aip.scitation.org/doi/10.1063/5.0011097
BibTex
@article{BUT177312, author="Martin {Štubian} and Juraj {Bobek} and Martin {Setvín} and Ulrike {Diebold} and Michael {Schmid}", title="Fast low-noise transimpedance amplifier for scanning tunneling microscopy and beyond", journal="Review of Scientific Instruments", year="2020", volume="91", number="7", pages="1--11", doi="10.1063/5.0011097", issn="0034-6748", url="https://aip.scitation.org/doi/10.1063/5.0011097" }