Instrumentation Amplifier using Robust Rail-to-Rail Operational Amplifiers with gm Control

Author

Prior, César A. ; Vieira, Filipe C B ; Rodrigues, Cesar R.

Author_Institution

Univ. Fed. de Santa Maria, Santa Maria

Volume

2

fYear

2006

fDate

6-9 Aug. 2006

Firstpage

148

Lastpage

152

Abstract

An instrumentation amplifier based on constant gm, rail-to-rail transconductance amplifiers is presented. The circuit was designed to 0.5 mum AMIS CS CMOS technology. Simulation results show that a -3 dB bandwidth about 190 kHz could be obtained. Operating with a 3 V supply and its dc gain set to 66 dB, the amplifier has a power consumption of 110 muW, and a CMRR higher than 140 dB.

Keywords

CMOS analogue integrated circuits; circuit simulation; instrumentation amplifiers; low-power electronics; operational amplifiers; AMIS CS CMOS technology; CMRR; DC gain; circuit simulation; current mirrored cascode output; gain 66 dB; instrumentation amplifier; power 110 muW; power consumption; robust rail-to-rail operational transconductance amplifiers; size 0.5 mum; transconductance gm control; voltage 3 V; Ambient intelligence; Bandwidth; CMOS technology; Circuit simulation; Instruments; Operational amplifiers; Rail to rail amplifiers; Rail to rail operation; Robust control; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006. MWSCAS '06. 49th IEEE International Midwest Symposium on

Conference_Location

San Juan

ISSN

1548-3746

Print_ISBN

1-4244-0172-0

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2006.382231

Filename

4267309