Cryogenic Low Noise Amplifier for Noise Spectroscopy in Scanning Tunnelling Microscopy

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Cryogenic Low Noise Amplifier for Noise Spectroscopy in Scanning Tunnelling Microscopy

Type: Master thesis
Title: Cryogenic Low Noise Amplifier for Noise Spectroscopy in Scanning Tunnelling Microscopy
Author: Koks, Corne
Issue Date: 2019-01-31
Keywords: Low Noise Amplifier
cryogenic amplifier
High frequency
Shot Noise
Abstract: The low noise amplifier from Bastiaans et al. [1] is improved by increasing the bandwidth, such that measurement time is reduced. Instead of a single common-source transistor, a cascode setup is used. A common-source is followed by a common-gate which is followed by a common-drain. The gain (V/V) of the amplifier is estimated to be 22. The cascoding reduces the miller capacitance from 22pF to approximately 2pF. The input noise current is estimated to be 19fA/√Hz and the voltage noise 0.2nV/√Hz. The power dissipation is estimated at 2mW.
Supervisor: Allan, Milan P.
Faculty: Faculty of Science
Department: Physics (Master)
Specialisation: Quantum Matter and Optics
ECTS Credits: 5
Evaluation: 8
Handle: http://hdl.handle.net/1887/72440
 

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