Cryogenic performance of a GaAs MMIC distributed amplifier

A three-stage GaAs MMIC distributed amplifier chip which was specially packaged in a two-chip, six-stage amplifier for cryogenic operation from 1 to 10 GHz is discussed. When immersed in liquid nitrogen, a fourfold reduction in amplifier noise is observed over the 4-GHz to 8-GHz frequency range. The...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 1991-03, Vol.39 (3), p.567-571
Hauptverfasser: Moore, C.R., Trimble, W.C., Edwards, M.L., Sanderson, T.R.
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creator Moore, C.R.
Trimble, W.C.
Edwards, M.L.
Sanderson, T.R.
description A three-stage GaAs MMIC distributed amplifier chip which was specially packaged in a two-chip, six-stage amplifier for cryogenic operation from 1 to 10 GHz is discussed. When immersed in liquid nitrogen, a fourfold reduction in amplifier noise is observed over the 4-GHz to 8-GHz frequency range. The cryogenic amplifier package is described, and the test configuration is explained. The reduction in amplifier noise is in agreement with the generally observed scaling with ambient temperature (in Kelvin) for discrete GaAs FET amplifiers.< >
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identifier ISSN: 0018-9480
ispartof IEEE transactions on microwave theory and techniques, 1991-03, Vol.39 (3), p.567-571
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source IEEE Electronic Library (IEL)
subjects Cryogenics
Distributed amplifiers
Frequency
Gallium arsenide
MMICs
Nitrogen
Noise reduction
Operational amplifiers
Packaging
Testing
title Cryogenic performance of a GaAs MMIC distributed amplifier
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