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A 0.5 V bulk‐driven voltage follower/DC level shifter and its application in class AB output stage
Author(s) -
Kulej Tomasz,
Blakiewicz Grzegorz
Publication year - 2015
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2029
Subject(s) - voltage , operational amplifier , electrical engineering , realization (probability) , current mirror , biasing , cmos , voltage divider , computer science , amplifier , control theory (sociology) , electronic engineering , engineering , transistor , mathematics , statistics , control (management) , artificial intelligence
Summary A simple realization of a 0.5 V bulk‐driven voltage follower/direct current (DC) level shifter designed in a 0.18 µm CMOS technology is presented in the paper. The circuit is characterized by large input and output voltage swings and a DC voltage gain close to unity. The DC voltage shift between input and output terminals can be regulated in a certain interval around zero, by means of biasing current sinks. An application of the proposed voltage follower circuit for realization of a low‐voltage class AB output stage has also been described in the paper. Finally, the operational amplifier exploiting the proposed output stage has been presented and evaluated in detail. Copyright © 2014 John Wiley & Sons, Ltd.