Rail to Rail CMOS Complementary Input Stage with Only One Active Differential Pair at a Time

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

doi:10.1587/elex.11.20140392

This article has now been updated. Please use the final version.

Rail to Rail CMOS Complementary Input Stage with Only One Active Differential Pair at a Time

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

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Keywords: Analog integrated circuits, CMOS integrated circuits, Amplifiers, low-voltage low power design

JOURNAL FREE ACCESS Advance online publication

Article ID: 11.20140392

DOI https://doi.org/10.1587/elex.11.20140392

The final version of this article is now available: Vol. 11 (2014), No. 12 pp. 20140392-20140392

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Abstract

A simple scheme for rail to rail op-amp operation is introduced. The input stage uses complementary differential pairs but only one pair is active at a time. It uses very compact control circuitry. Experimental verification is provided from a test chip prototype in 0.5 µm CMOS technology.

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