Automated synthesis, placement and routing of large-scale RSFQ integrated circuits

Date
2021-03
Journal Title
Journal ISSN
Volume Title
Publisher
Stellenbosch : Stellenbosch University
Abstract
ENGLISH ABSTRACT: The dissertation presents the development and implementation of an automated synthesistool for the synthesis of Rapid Single Flux Quanta (RSFQ) logic circuits from a high-leveldescription of a circuit. With today’s excessive demand for high-performance computation,the current complementary metal-oxide-semiconductor (CMOS) circuits already at itspinnacle does not deliver on present requirements, therefore a new form of integratedcircuits will be highly-priced. RSFQ logic circuits may be a solution with new interest andfunding it may become a reality in the future. The developed synthesis tool, ViPeR cancreate a 4-bit adder circuit that can operate at 35GHz. Further development to improvethe tool and processes seems possible. ViPeR consists of a subset of tools, each with aunique purpose in synthesising the RSFQ circuit. The primary challenges were to balancethe logic gate with delay flip-flops (DFFs), generating an optimal layout for the logic gatesand finally to integrate a clock distribution network into the circuit. Two other toolswere also created to aid in the verification and final chip generation of the circuit, namelyDie2Sim and chipSmith. The synthesised circuits are evaluated and compared to existingcircuits, paving the way for future development
AFRIKAANSE OPSOMMING: Hierdie proefskrif handel oor die ontwikkeling en implementasie van ’n sintese-instrumentvir die sintese van ’nRapid Single Flux Quanta(RSFQ) logiese stroombaan, vanaf ’nho ̈evlak beskrywing van so ’n stroombaan. In heedendaagse tyd is daar ’n uiters hoeaanvraag vir ’n ho ̈e spoed rekaar berekeninge baie gesog.Complementary metal-oxide-semiconductor(CMOS) stroombane is die huidige oplossing maar die spoed hiervan isalreeds op maksimum punt, daarom is ’n nuwe vorm van ge ̈ıntegreerde stroombane nodig.RSFQ logiese stroombane blyk om ’n oplossing te wees met onlangse belangstelling enbefondsing kan dit ’n werklikheid word. Die ontwikkelde sintese-instrument, ViPeR kan’n 4-bis-sommeerder skep wat teen 35GHz loop, verdere navorsing en verbetering blykmoontlik. ViPeR bestaan uit ’n stel instrumente wat elk ’n unieke doel het om dieRSFQ-stroombaan te sintetiseer. Die primˆere uitdagings was om die logiese hekke metdelay flip-flops(DFFs) te balanseer, ’n optimale uitleg vir die logiese hekke te genereeren uiteindelik ’n klokverspreidingsnetwerk in die stroombaan te integreer. Twee anderinstrumente is ook geskep om te help met die verifikasie en finale opwekking van dieskyfies, naamlik Die2Sim en chipSmith. Die toets gesintetiseerde stroombane is ge ̈evalueeren vergelyk met bestaande stroombane, met resultate wat die weg baan vir toekomstigeontwikkeling
Description
Thesis (MEng)--Stellenbosch University, 2021.
Keywords
Digital electronics, UCTD, Rapid Single Flux Quanta, Synthesis, Integrated circuits, Metal oxide semiconductors, Complementary
Citation