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Compact low-voltage rail-to-rail bulk-driven CMOS opamp for scaled technologies

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5 Author(s)
Carrillo, J.M. ; Dept. of Electron., Univ. of Extremadura, Badajoz, Spain ; Perez-Aloe, R. ; Valverde, J.M. ; Duque-Carrillo, J.F.
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This paper illustrates the rail-to-rail capability of a single-pair bulk-driven CMOS input stage operated from an extremely low supply voltage. A composite input stage is also introduced for performance comparison, based on experimental data obtained in standard 0.35 mum CMOS technology with a supply voltage of 1 V. Measurements demonstrate the rail-to-rail suitability of the single-pair input stage and show advantages of this approach in some amplifier performance, such as linearity and common-mode rejection ratio, as compared to the case of the composite solution. The performance achieved can be extended to a nanoscale process, as lower supply voltages in scaled technologies are expected.

Published in:

Circuit Theory and Design, 2009. ECCTD 2009. European Conference on

Date of Conference:

23-27 Aug. 2009