Trade-offs and Limitations in Energy-Efficient Inverter-based CMOS Amplifiers

Ana Correia, Vítor Grade Tavares, Pedro Barquinha, João Goes

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

Abstract

The operational transconductance amplifier (OTA) is, probably, the most relevant building block in analog circuits. However, its design has become particularly difficult in deep nanoscale CMOS technologies. Consequently, during the past
decade, several inverter-based continuous-time and switchedcapacitor (SC) amplifier circuit solutions have been proposed to overcome the limitations imposed by deep-submicron processes. Inverters scale friendly with the technology downscaling, but their applicability depends on some key performance parameters such as, energy-efficiency, die area, low-frequency (DC) gain, gain-bandwidth product (GBW) and linearity versus outputswing (OS). This paper presents three inverter-based SC amplifiers, namely a single inverter, a three-stage inverter, and a threestage inverter with a multipath. The key performance parameters are simulated and fairly compared. The impact of their linearity on systems, depending on the application, is also discussed.
Original languageEnglish
Title of host publication2021 XXXVI Conference on Design of Circuits and Integrated Systems (DCIS): November 24-26th, 2021 Vila do Conde, Portugal
EditorsJosé Machado da Silva, Vítor Grade Tavares
Place of PublicationPiscataway
PublisherIEEE
Number of pages5
ISBN (Electronic)978-1-6654-2116-4
ISBN (Print)978-1-6654-2117-1
DOIs
Publication statusPublished - 2021
Event2021 XXXVI Conference on Design of Circuits and Integrated Systems (DCIS) - Vila do Conde, Portugal
Duration: 24 Nov 202126 Nov 2021

Publication series

Name2021 XXXVI Conference on Design of Circuits and Integrated Systems (DCIS)
PublisherIEEE
ISSN (Print)2471-6170
ISSN (Electronic)2640-5563

Conference

Conference2021 XXXVI Conference on Design of Circuits and Integrated Systems (DCIS)
Country/TerritoryPortugal
CityVila do Conde
Period24/11/2126/11/21

Keywords

  • Inverter-based switched-capacitor circuits
  • Linearity
  • Operational transconductance amplifiers

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