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

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

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

5 Citations (Scopus)

Abstract

A simple and power efficient scheme for input rail-to-rail Op-Amp operation with constant gm 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 2014
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1356-1359
Number of pages4
ISBN (Print)9781479934324
DOIs
Publication statusPublished - 1 Jan 2014
Event2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014 - Melbourne, VIC, Australia
Duration: 1 Jun 20145 Jun 2014

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
ISSN (Print)0271-4310

Conference

Conference2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014
CountryAustralia
CityMelbourne, VIC
Period1/06/145/06/14

Keywords

  • amplifiers
  • analog integrated circuits
  • CMOS Op-Amps
  • rail -to-rail

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    Valero, M. R., Roman-Loera, A., Ramirez-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 2014 (pp. 1356-1359). [6865395] (Proceedings - IEEE International Symposium on Circuits and Systems). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ISCAS.2014.6865395