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  4. Optimizing Adiabatic Quantum-Flux-Parametron (AQFP) Circuits using an Exact Database
 
conference paper

Optimizing Adiabatic Quantum-Flux-Parametron (AQFP) Circuits using an Exact Database

Marakkalage, Dewmini Sudara  
•
Riefler, Heinz
•
De Micheli, Giovanni  
January 1, 2021
2021 Ieee/Acm International Symposium On Nanoscale Architectures (Nanoarch)
IEEE/ACM International Symposium on Nanoscale Architectures (NANOARCH)

Adiabatic Quantum-Flux-Parametron (AQFP) is a family of superconducting electronic (SCE) circuits exhibiting high energy efficiency. In AQFP technology, logic gates require splitters to drive multiple fanouts and both the logic gates and the splitters are clocked, requiring path balancing using buffers to ensure all fanins of a gate arrive simultaneously. In this work, we propose a new synthesis approach comprising of two stages: In the first stage, a database of optimum small AQFP circuit structures is generated. This is a one-time, network-independent operation. In the second stage, the input network is first mapped to a LUT network and then the LUTs are replaced with the locally optimum (area or delay) AQFP structures from the generated database in the topological order. Our proposed method simultaneously optimizes the resources used by 1) gates that compute logic functions and 2) buffers/splitters. Hence, it captures additional optimization opportunities that are not explored in the state-of-the-art methods where buffer-splitter optimizations are done after the logic optimizations. Our method, when using a delay-oriented (area-oriented) strategy, achieves over a 40% (35%) decrease in delay in the critical path (the number of levels) and a 19% (21%) decrease in area (the number of Josephson Junctions) as compared to existing work.

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Type
conference paper
DOI
10.1109/NANOARCH53687.2021.9642241
Web of Science ID

WOS:000758415000009

Author(s)
Marakkalage, Dewmini Sudara  
Riefler, Heinz
De Micheli, Giovanni  
Date Issued

2021-01-01

Publisher

IEEE

Publisher place

New York

Published in
2021 Ieee/Acm International Symposium On Nanoscale Architectures (Nanoarch)
ISBN of the book

978-1-6654-0959-9

Series title/Series vol.

IEEE International Symposium on Nanoscale Architectures

Subjects

Computer Science, Hardware & Architecture

•

Computer Science, Theory & Methods

•

Engineering, Electrical & Electronic

•

Nanoscience & Nanotechnology

•

Computer Science

•

Engineering

•

Science & Technology - Other Topics

•

aqfp

•

emerging technologies

•

majority gates

•

exact synthesis

•

logic synthesis

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

Event nameEvent placeEvent date
IEEE/ACM International Symposium on Nanoscale Architectures (NANOARCH)

ELECTR NETWORK

Nov 08-10, 2021

Available on Infoscience
March 14, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/186279
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