Title :
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
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;
Conference_Titel :
Circuits and Systems, 2006. MWSCAS '06. 49th IEEE International Midwest Symposium on
Conference_Location :
San Juan
Print_ISBN :
1-4244-0172-0
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2006.382231
