Revisiting Dynamic Logic - A True Candidate for Energy-Efficient Cryogenic Operation in Nanoscaled Technologies

Inbal Stanger, Noam Roknian, Netanel Shavit, Yonatan Shoshan, Yoav Weizman, Adam Teman, Edoardo Charbon, Alexander Fish

Research output: Contribution to journalArticlepeer-review

Abstract

Dynamic logic is a high-speed technology that was previously used in mature technologies, but lost popularity due to the increased leakage and process variations in advanced technologies. However, the recent popularity of circuits running in the cryogenic region provides a new opportunity for dynamic operation, thanks to the reduced leakages at such low temperatures. This paper revisits dynamic logic as a true candidate for high-performance and energy-efficient circuits for cryogenic operation in nanoscaled technologies. The paper first overviews and analyzes transistor operation at cryogenic temperatures and how it influences digital circuit design targeted to this regime. With these effects in mind, the use of dynamic logic families, including the classical dynamic (NORA) logic and the recently introduced Dual Mode Logic (DML) and Dual Mode Pass Logic (DMPL) families, are examined under cryogenic operation, showcasing improved performance and power efficiency. Measurements conducted on a 16 nm FinFET test chip validate their operation at low temperatures down to 4K, with supply voltages ranging 0.4-0.8-V. Furthermore, the considered dual mode logic families exhibit performance enhancements of up to 26% in dynamic mode and power efficiency increases up to 53% in static mode, compared to CMOS.

Original languageEnglish
Pages (from-to)987-999
Number of pages13
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Volume71
Issue number3
DOIs
StatePublished - 1 Mar 2024

Keywords

  • 16 nm
  • cryogenic temperatures
  • dual mode logic (DML)
  • dual mode pass logic (DMPL)
  • dynamic logic
  • energy-efficiency
  • logic families
  • low power
  • pass-transistor logic (PTL)

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Hardware and Architecture

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