Cryogenic amplifiers for interfacing superconductive systems to room temperature electronics
Date
2008-12
Authors
Badenhorst, Le Roux
Journal Title
Journal ISSN
Volume Title
Publisher
Stellenbosch : Stellenbosch University
Abstract
This thesis is aimed at testing commercially available CMOS amplifier ICs at
4 K. Super Conducting Electronics (SCE) will also be used to amplify RSFQ
signals for easier detection by CMOS technology and better signal-to-noise
ratios.
The SCE comprises of a Suzuki stack amplifier, a 250 μA JTL and a
DC-to-SFQ converter. The Suzuki stack amplifier is simulated in WRSPICE.
It is able to amplify an SFQ signal synchronised with an external clock signal.
The amplified signal can then be detected by a normal commercially available
CMOS amplifier IC.
To keep the noise in the signal to a minimum, the commercial amplifier must
be be situated as close as possible to the SCE. The amplifier must therefore
be able to operate at 4 K. Ten different amplifier ICs were tested and three
was found that worked down to 4 K.
Description
Thesis (MScEng (Electrical and Electronic Engineering))--Stellenbosch University, 2008.
Keywords
Superconductors, Electronic amplifiers, Metal oxide semiconductors, Complementary, Dissertations -- Electronic engineering, Theses -- Electronic engineering