1 v rail-to-rail constant-gm CMOS op amp

C. W. Lu*, C. M. Hsiao

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

A 1 V rail-to-rail constant-gm CMOS operational amplifier is proposed. This study shows that keeping the sum of currents in the complementary differential pairs constant rather than controlling the tail currents produces a constant-gm input stage operating in the weak inversion. The currents in the n-channel differential pair are regulated to keep the sum of currents in the complementary differential pairs constant using a negative feedback loop. This study also provides experimental results obtained from a 0.35m CMOS prototype chip.

Original languageEnglish
Pages (from-to)529-530
Number of pages2
JournalElectronics Letters
Volume45
Issue number11
DOIs
StatePublished - 2009

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