Open AccessFree class AB–AB Miller opamp with high current enhancement
Author(s) -
RomanLoera Alejandro,
RamirezAngulo Jaime,
LopezMartin Antonio,
Carvajal Ramon G.
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2014.4064
Subject(s) - operational amplifier , cmos , current (fluid) , current feedback operational amplifier , electronic engineering , electrical engineering , transistor , voltage , current mirror , class (philosophy) , amplifier , computer science , engineering , materials science , artificial intelligence
A two‐stage (Miller) operational amplifier (opamp) with both class AB input and output stages is introduced. It has a well‐controlled quiescent current and generates dynamic output currents of up to a factor 45 times larger than the quiescent current. It uses very compact circuitry with small static power consumption in order to achieve class AB–AB operation and can operate with a low supply voltage. Experimental results of a test chip fabricated using 0.18 μm CMOS technology and simulations in 130, 90, 65 and 45 nm verify the proposed circuit.