Open Access84 dB DC‐gain two‐stage class‐AB OTA
Author(s) -
Anisheh Seyed Mahmoud,
Abbasizadeh Hamed,
Shamsi Hossein,
Dadkhah Chitra,
Lee KangYoon
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.2018.5038
Subject(s) - slew rate , cmos , amplifier , electronic engineering , electrical engineering , loop gain , bandwidth (computing) , voltage , dissipation , physics , computer science , engineering , telecommunications , thermodynamics
Operational trans‐conductance amplifiers (OTAs) are an essential building block in analogue and mixed‐signal circuits. In this study, a new two‐stage class‐AB OTA is proposed. The class‐AB operation is obtained without extra power dissipation, and without unity‐gain bandwidth or noise degradation. The circuit was fabricated using 1P6M 180‐nm CMOS technology under 1.8 V supply voltage. The measurement results indicate 13 dB enhancement in DC‐gain and 1.8 times improvement in slew rate compared to its conventional counterpart. Comparison results indicate that the proposed OTA demonstrates better performance than the state‐of‐the‐art designs.