Open AccessIntegrated Rail‐to‐Rail Low‐Voltage Low‐Power Enhanced DC‐Gain Fully Differential Operational Transconductance Amplifier
Author(s) -
Ferri Giuseppe,
Stornelli Vincenzo,
Celeste Angelo
Publication year - 2007
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.07.0107.0172
Subject(s) - operational transconductance amplifier , transconductance , slew rate , electrical engineering , operational amplifier , fully differential amplifier , cmos , amplifier , voltage , engineering , electronic engineering , transistor
In this paper, we present an integrated rail‐to‐rail fully differential operational transconductance amplifier (OTA) working at low‐supply voltages (1.5 V) with reduced power consumption and showing high DC gain. An embedded adaptive biasing circuit makes it possible to obtain low stand‐by power dissipation (lower than 0.17 mW in the rail‐to‐rail version), while the high DC gain (over 78 dB) is ensured by positive feedback. The circuit, fabricated in a standard CMOS integrated technology (AMS 0.35 μm), presents a 37 V/μs slew‐rate for a capacitive load of 15 pF. Experimental results and high values of two quality factors, or figures of merit, show the validity of the proposed OTA, when compared with other OTA configurations.