A rail-to-rail DC-enhanced adaptive biased fully differential OTA

Author

Ferri, Giuseppe ; Stornelli, Vincenzo ; Marcellis, Andrea De ; Celeste, Angelo

Author_Institution

Dept. of Electr. & Inf. Eng., Univ. of L´´Aquila, L´´Aquila

fYear

2007

Firstpage

527

Lastpage

530

Abstract

In this paper a novel rail-to-rail fully differential operational transconductance amplifier (OTA) working at low- supply voltages (1.5 V) with reduced consumption and showing high DC gain is presented. An adaptive biasing circuit allows to obtain low stand-by power dissipation (lower than 0.19 mW in the rail-to-rail version), while the high DC gain (over 80 dB) is ensured by a positive feedback. The circuit, designed in a standard CMOS integrated technology (AMS 0.35 mum), has a 40 V/mus slew-rate for a capacitive load of 15 pF. The calculated values of two quality factors, named FOM_S/L, in the literature, show the validity of the proposed OTA.

Keywords

CMOS integrated circuits; low-power electronics; operational amplifiers; CMOS integrated technology; DC gain; adaptive biasing circuit; capacitive load; operational transconductance amplifier; positive feedback; quality factors; rail-to-rail fully-differential OTA; stand-by power dissipation; voltage 1.5 V; CMOS technology; Differential amplifiers; Feedback circuits; Gain; Operational amplifiers; Power dissipation; Rail to rail amplifiers; Rail to rail operation; Transconductance; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuit Theory and Design, 2007. ECCTD 2007. 18th European Conference on

Conference_Location

Seville

Print_ISBN

978-1-4244-1341-6

Electronic_ISBN

978-1-4244-1342-3

Type

conf

DOI

10.1109/ECCTD.2007.4529649

Filename

4529649