Design and development of a cryogenic semiconductor amplifier for interfacing RSFQ circuits at 4.2K

There is a great deal of interest in amplifiers with extremely high bandwidth, low noise and low power consumption which interface RSFQ circuits with commercial room temperature electronics or amplifying SFQ pulses. In this special application a hybrid amplifier should interface an RSFQ circuitry wi...

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Bibliographic Details
Published in:Superconductor science & technology 2007-11, Vol.20 (11), p.S356-S361
Main Authors: Wuensch, S, Crocoll, E, Schubert, M, Wende, G, Meyer, H-G, Siegel, M
Format: Article
Language:English
Online Access:Get full text
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Summary:There is a great deal of interest in amplifiers with extremely high bandwidth, low noise and low power consumption which interface RSFQ circuits with commercial room temperature electronics or amplifying SFQ pulses. In this special application a hybrid amplifier should interface an RSFQ circuitry with a Josephson junction array quantizer chip (JA-Q) at 4.2 K. The input signal for the amplifier is generated by an RSFQ signal generator and the output signal fed-in to a Josephson array quantizer. A voltage gain of about 104 with a pattern frequency of 2 GHz for a good transfer of the SFQ pulses is required. Additionally, the JA-Q requires a high output current at low power consumption of the amplifier at the same time.
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/20/11/S11