Near-threshold 40nm supply feedback C-element

Idan Schwartz, Adam Teman, Rostislav Dobkin, Alexander Fish

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


The growing demand for ultra low power applications has drawn interest in low voltage digital circuits, operating in the near-threshold region. Asynchronous circuits, operating with near-threshold supply voltages, are more attractive than their synchronous counterparts due to higher resilience to PVT variations. This paper presents a novel ultra-low power C-element, which is a basic building block in common asynchronous circuits. The proposed C-element is based on a Supply Feedback concept, implemented in a cross-coupled inverter latch. Utilization of this concept enables functionality under local and global variations down to 0.3V. The cell was designed using a standard low-power 40nm technology. Simulation results show a 5.8X-24X leakage reduction at 300mV as compared to a conventional Weak Feedback C-element operating at its minimal V DD. Monte Carlo simulations prove that the proposed cell remains fully functional under global and local process variations.

Original languageEnglish
Title of host publicationProceedings of the 3rd Asia Symposium on Quality Electronic Design, ASQED 2011
Number of pages5
StatePublished - 1 Dec 2011
Event3rd Asia Symposium on Quality Electronic Design, ASQED 2011 - Kuala Lumpur, Malaysia
Duration: 19 Jul 201120 Jul 2011

Publication series

NameProceedings of the 3rd Asia Symposium on Quality Electronic Design, ASQED 2011


Conference3rd Asia Symposium on Quality Electronic Design, ASQED 2011
CityKuala Lumpur


  • Asynchronous
  • C-element
  • Near-threshold

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality


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