A folded voltage-combiners biased amplifier for low voltage and high energy-efficiency applications

Ricardo Póvoa, Nuno Lourenço, Ricardo M. F. Martins, António Canelas, Nuno C. G. Horta, João Goes

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The topic of this brief is a single-stage amplifier biased by a doublet of voltage-combiners in a folded configuration, in order to be supplied by a power source of 1.2 V, maintaining proper dc biasing and avoiding the need of any device stacking. The topology has been automatically designed, optimized, and laid out, from sizing to layout level, using a layout-aware approach provided by the AIDA framework, a state-of-the-art analog IC design optimization framework. Experimental results prove that a gain of approximately 44 dB, together with a figure-of-merit higher than 1300 MHz × pF/mW are achievable using the proposed topology, with standard UMC 130 nm technology devices and a 1.2-V supply source. Finally, an extension to supply sources below nominal is explored, showing exciting results toward a future of high energy-efficiency amplifiers.

Original languageEnglish
Article number8698300
Pages (from-to)230-234
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume67
Issue number2
DOIs
Publication statusPublished - Feb 2020

Keywords

  • energy-efficiency
  • Folded voltage-combiners
  • gain improvement
  • low-power
  • low-voltage
  • OTA
  • single-stage

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