A 0.8-V 1.2-μW rail-to-rail fully differential OpAmp with adaptive biasing

M. R. Valero, S. Celma, N. Medrano, B. Calvo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

This paper presents an ultra low-power rail-to-rail fully differential operational amplifier (OpAmp) fabricated in a standard 0.18 μm CMOS technology. The proposed circuit uses transistors biased in the sub-threshold region for low-voltage low-power operation. For a 0.8 V single supply and 8 pF loads, experimental measurements shows a 51 dB open loop gain, 62° phase margin, 57 kHz unity gain frequency and a 750 mV linear output swing. Adaptive biasing provides 0.14 V/μs slew-rate, while a 73 dB CMRR is achieved thanks to a CMFF circuit, demonstrating the correct functionality of the OpAmp with a power consumption of 1.2 μW.
Original languageEnglish
Title of host publication2012 Proceedings of the ESSCIRC (ESSCIRC)
PublisherIEEE
Pages77-80
Number of pages4
DOIs
Publication statusPublished - 12 Nov 2012
Event38th European Solid-State Circuit Conference - Bordeaux Convention Centre, Bordeaux, France
Duration: 18 Sep 201220 Sep 2012

Conference

Conference38th European Solid-State Circuit Conference
Abbreviated titleESSCIRC 2012
CountryFrance
CityBordeaux
Period18/09/1220/09/12

Keywords

  • CMOS analogue integrated circuits
  • differential amplifiers
  • low-power electronics
  • operational amplifiers
  • transistor circuits
  • CMFF circuit
  • CMOS technology
  • OpAmp
  • adaptive biasing
  • frequency 57 kHz
  • gain 51 dB
  • linear output swing
  • low-voltage low-power operation
  • power 1.2 muW
  • power consumption
  • size 0.18 mum
  • slew-rate
  • subthreshold region
  • transistor biasing
  • ultra low-power rail-to-rail fully differential operational amplifier
  • voltage 0.8 V
  • voltage 750 mV
  • CMOS integrated circuits
  • Gain
  • Operational amplifiers
  • Rail to rail inputs
  • Temperature measurement
  • Transistors
  • Voltage measurement

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  • Cite this

    Valero, M. R., Celma, S., Medrano, N., & Calvo, B. (2012). A 0.8-V 1.2-μW rail-to-rail fully differential OpAmp with adaptive biasing. In 2012 Proceedings of the ESSCIRC (ESSCIRC) (pp. 77-80). IEEE. https://doi.org/10.1109/ESSCIRC.2012.6341260