Open AccessDesign of Two‐Stage Class AB CMOS Buffers: A Systematic Approach
Author(s) -
Martin Antonio Lopez,
Miguel Jose Maria Algueta,
Acosta Lucia,
RamírezAngulo Jaime,
Carvajal Ramón Gonzalez
Publication year - 2011
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.11.0110.0465
Subject(s) - slew rate , cmos , class (philosophy) , electronic engineering , amplifier , power (physics) , topology (electrical circuits) , noise (video) , stage (stratigraphy) , computer science , engineering , control theory (sociology) , electrical engineering , physics , voltage , paleontology , control (management) , biology , quantum mechanics , artificial intelligence , image (mathematics)
A systematic approach for the design of two‐stage class AB CMOS unity‐gain buffers is proposed. It is based on the inclusion of a class AB operation to class A Miller amplifier topologies in unity‐gain negative feedback by a simple technique that does not modify quiescent currents, supply requirements, noise performance, or static power. Three design examples are fabricated in a 0.5 µm CMOS process. Measurement results show slew rate improvement factors of approximately 100 for the class AB buffers versus their class A counterparts for the same quiescent power consumption (< 200 µW).