SQUID parametric amplifier

Author

Silver, A.H. ; Sandell, R.D. ; Hurrell, J.P. ; Pridmore-Brown, D.C.

Author_Institution

TRW Space and Technology, One Space Park, Redondo Beach, CA

Volume

19

Issue

3

fYear

1983

fDate

5/1/1983 12:00:00 AM

Firstpage

622

Lastpage

624

Abstract

The single junction SQUID was previously shown by analysis and simulation to be an attractive candidate for a parametric amplifier. Further calculations of the noise and saturation behavior of the nearly degenerate parametric amplifier have now been performed by numerical simulation. These simulations clearly show that the amplifier noise temperature will be approximately the device temperature T0, and that the amplifier will be completely saturated in the presence of white noise characteristic of 30T0. Signal saturation of the amplifier also occurs for an output power $10^{-2}F_{o}\\phi_{o}^{2}/2L$ , strongly limiting the dynamic range, However, a coherent array of N single junction SQUIDs is shown to have a signal saturation level increased by N relative to a single SQUID, with no increase in noise temperature, resulting in an N-fold improvement in dynamic range.

Keywords

Amplifier noise; Josephson device amplifiers; Parametric amplifiers; Circuit noise; Frequency; Inductance; Low-noise amplifiers; Noise figure; RLC circuits; Radiofrequency amplifiers; Resonance; SQUIDs; Tiles;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1983.1062473

Filename

1062473