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1-V quasi constant-gm input/output rail-to-rail CMOS op-amp

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4 Author(s)
Carrillo, J.M. ; Dept. of Electron. & Elect. Eng, Univ. de Extremadura, Badajoz, Spain ; Duque-Carrillo, J.F. ; Torelli, G. ; Ausin, J.L.

An input/output rail-to-rail CMOS operational amplifier with quasi constant small-signal behavior and operating with a 1-V single supply, is presented. Dynamically biased input level shifters are used to extend the amplifier input voltage range. The operation of these common-mode adapters is controlled taking the small-signal response of the amplifier input stage into account. Experimental results on a test-chip fabricated in standard 0.8-μm CMOS technology are given.

Published in:
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on  (Volume:1 )

Date of Conference: 25-28 May 2003

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