Rail-to-rail CMOS complementary input stage with alternating active differential pairs

M. R. Valero, A. Roman-Loera, J. Ramírez-Angulo, N. Medrano, S. Celma

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

4 Citations (Scopus)

Abstract

A simple and power efficient scheme for input rail-to-rail Op-Amp operation with constant g m and CMRR over the common mode input range is introduced. The input stage uses complementary differential pairs but only one pair is active at a time. Three implementations of the scheme are discussed. They use very compact control circuitry to turn only one of the differential pairs at a time. Simulations and experimental verification of the proposed scheme are provided from a test chip prototype in 0.5μm CMOS technology.
Original languageEnglish
Title of host publication2014 IEEE International Symposium on Circuits and Systems (ISCAS)
Place of PublicationUSA
PublisherIEEE
Pages1356-1359
Number of pages4
DOIs
Publication statusPublished - 28 Jul 2014
Event IEEE International Symposium on Circuits and Systems (ISCAS 2014) - Melbourne, Australia
Duration: 1 Jun 20145 Jun 2014

Conference

Conference IEEE International Symposium on Circuits and Systems (ISCAS 2014)
CountryAustralia
CityMelbourne
Period1/06/145/06/14

Keywords

  • CMOS analogue integrated circuits
  • operational amplifiers
  • CMRR
  • active differential pairs
  • common mode input range
  • compact control circuitry
  • complementary differential pair
  • input rail-to-rail op-amp operation
  • rail-to-rail CMOS complementary input stage
  • size 0.5 mum
  • test chip prototype
  • CMOS integrated circuits
  • MOS devices
  • Power dissipation
  • Rail to rail amplifiers
  • Rails
  • Transistors
  • Voltage control
  • CMOS Op-Amps
  • amplifiers
  • analog integrated circuits
  • rail -to-rail

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  • Cite this

    Valero, M. R., Roman-Loera, A., Ramírez-Angulo, J., Medrano, N., & Celma, S. (2014). Rail-to-rail CMOS complementary input stage with alternating active differential pairs. In 2014 IEEE International Symposium on Circuits and Systems (ISCAS) (pp. 1356-1359). IEEE. https://doi.org/10.1109/ISCAS.2014.6865395