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Analyse d'une nouvelle architecture pipeline de convertisseur analogique numérique supraconducteur

Abstract : Superconductive analogue to digital converters (ADC) generally have speed and power dissipation advantages which should enable their application in telecommunication, medicine, and where an analogue signal (delivered e.g. by a sensor) needs to be digitized for post-processing.We are developing a new concept of analogue to digital converter using high critical temperature (Tc=90K) superconductors and operating at 30GHz; this converter is based an original structure, the pipeline architecture. The principle is to place a cascade of N comparators along a transmission line on which propagates the up-converted analogue signal. The carrier frequency is used in this case as a sampling signal.Each comparator, made with a SQUID loop, produces one bit at the carrier frequency: it codes the input signal by generating or not an RSFQ pulse (respectively "1” or “0"), and passes the residue (attenuated signal) in the following comparator.Here, we present steps for the comparator optimisation and mask design.Besides simulation results, we present the measurements at 30GHz carrier frequency of the comparator designed at low critical temperature (LTS). Finally, we suggest other tools to develop the optimised low critical temperature converter and we proposed the concept of the comparator operating at high critical temperature (HTS).
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Submitted on : Monday, July 30, 2012 - 11:22:59 AM
Last modification on : Thursday, November 19, 2020 - 1:00:43 PM
Long-term archiving on: : Wednesday, October 31, 2012 - 3:21:37 AM


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  • HAL Id : tel-00721747, version 1



Joël Roméo Ngankio Njila. Analyse d'une nouvelle architecture pipeline de convertisseur analogique numérique supraconducteur. Micro et nanotechnologies/Microélectronique. Université de Grenoble, 2012. Français. ⟨NNT : 2012GRENT006⟩. ⟨tel-00721747⟩



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