Open AccessBiasing technique to improve total harmonic distortion in an ultra‐low‐power operational transconductance amplifier
Author(s) -
Sánchez Arnaldo del Risco,
Moreno Robson L.,
Ferreira Luis Henrique,
Crepaldi Paulo C.
Publication year - 2019
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
eISSN - 1751-8598
pISSN - 1751-858X
DOI - 10.1049/iet-cds.2019.0104
Subject(s) - total harmonic distortion , transconductance , operational transconductance amplifier , amplifier , electronic engineering , biasing , electrical engineering , distortion (music) , cmos , dynamic range , power (physics) , materials science , operational amplifier , engineering , voltage , physics , transistor , quantum mechanics
This study presents a new technique based on large signal analysis, to enhance the total harmonic‐distortion (THD) in an ultra‐low‐power operational transconductance amplifier (OTA). The proposed technique is used to implement an ultra‐low‐power gate‐driven and bulk‐driven OTA with high linear range. Mismatch and post‐layout simulations in 0.13 μm CMOS technology demonstrate that the proposed technique can improve the THD and the dynamic range, without affecting the transconductance tuning and the common‐mode control. It achieves a 183 and 640 mVpp linear ranges for gate‐driven and bulk‐driven OTA, and a 61.8 dB dynamic range at 0.5 V with 26.35 nW power dissipation.