vioft2nntf2t|tblJournal|Abstract_paper|0xf4ff0b32240000004718010001000400 This paper proposes a Current Feedback Operational Transconductance Amplifier (CFB OTA) with a folded cascode op-amp as input stage cascaded with class AB buffer as output stage. This gives better results on parameters such as bandwidth, slew rate, settling time and input offset voltage compared to the conventional CFOA. Hence it carries significance in high frequency applications such as A/D converters and active filters where CMOS CFOA used as an active building block. CADENCE simulation results are obtained using 180nm CMOS process (supply voltage of ±2.5V, 100µA biasing current) and 90nm CMOS process (supply voltage of ±1.2V, 50µA biasing current). Some of the performance parameters obtained are DC gain of 60.2dB, open-loop gain bandwidth product(GBW) of 307 MHz, slew rate (SR+) of +30V/µS to +90V/µS and DC input offset voltage of -0.6nV.
C S Sajin1, M R Ramrosh2, T A Shahul Hameed3
LBS Centre for Science and Technology, India1, T.K.M. College of Engineering, India2,3
CFOA, Class AB Buffer, Extended Bandwidth
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| Published By :
ICTACT
Published In :
ICTACT Journal on Microelectronics
( Volume: 3 , Issue: 2 , Pages: 389-393 )
Date of Publication :
July 2017
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