Open AccessA 0.6 V class‐AB rail‐to‐rail CMOS OTA exploiting threshold lowering
Author(s) -
Centurelli F.,
Monsurrò P.,
Parisi G.,
Tommasino P.,
Trifiletti A.
Publication year - 2018
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2018.5175
Subject(s) - transconductance , cmos , voltage , transistor , electrical engineering , operational transconductance amplifier , threshold voltage , amplifier , topology (electrical circuits) , operational amplifier , electronic engineering , common mode signal , engineering , digital signal processing , analog signal
A class‐AB OTA (operational transconductance amplifier) topology with rail‐to‐rail input common‐mode range is proposed for application in very low‐voltage applications. High efficiency is achieved by reusing transistors both for class‐AB operation and for mirroring the output currents, and a threshold lowering technique is applied to allow supply voltages less than two threshold voltages. Simulations in 40 nm CMOS technology show 41 dB gain at ±0.3 V supply voltage, a unity‐gain frequency of 8.8 MHz on a 5 pF load, class‐AB behaviour and full rail‐to‐rail operation when closed in unity‐gain buffer configuration.