ICTACT Journal on Microelectronics

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Design and Simulation of Current Feedback Operational Amplifier in 180nm and 90nm CMOs Processes


Affiliations
1 Department of Electronics and Communication Engineering, LBS Centre for Science and Technology, India
2 Department of Electronics and Communication Engineering, T.K.M. College of Engineering, India
     

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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.

Keywords

CFOA, Class AB Buffer, Extended Bandwidth.
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  • A.H. Madian, S.A. Mahmoud and A.M. Soliman, “Configurable Analog Block Based on CFOA and Its Application” , WSEAS Transactions on Electronics, Vol. 5, No. 6, pp. 220-225, 2008.

  • Byungjoon Park, Sangsu Jin, Daechul Jeong, Jooseung Kim, Yunsung Cho, Kyunghoon Moon and Bumman Kim, “Highly Linear mm-Wave CMOS Power Amplifier”, IEEE Transactions on Microwave Theory and Techniques, Vol. 64, No. 12, pp. 4535-4544, 2016.

  • H.L. Chao and D.S. Ma, “CMOS Variable-Gain Wide-Bandwidth CMFB-Free Differential Current Feedback Amplifier for Ultrasound Diagnostic Applications” , Proceedings of IEEE International Symposium on Circuits and Systems, pp. 649-652, 2006.

  • G. Giustolisi, G. Palmisano, G. Palumbo and S. Pennisi, “High-Drive CMOS Current-Feedback Opamp” , Proceedings of 40th Midwest Symposium on Circuits and Systems, pp. 229-232, 1997.

  • G. Palumbo and S. Pennisi, “Current-Feedback Amplifiers versus Voltage Operational Amplifiers” , IEEE Transactions on Circuits and Systems, Vol. 48, No. 5, pp. 617-623, 2001.

  • S. Pennisi, “High-Performance CMOS Current Feedback Operational Amplifier” , Proceedings of IEEE International Symposium on Circuits and Systems, Vol. 2, pp. 1573-1576, 2005.

  • J. Mahattanakul and C. Toumazou, “A Theoretical Study of the Stability of High Frequency Current Feedback Op-Amp Integrators” , IEEE Transactions on Circuits and Systems, Vol. 43, No. 1, pp. 1-12, 1996.

  • M. Djebbi, A. Assi and M. Sawan, “An Offset-Compensated Wide-Bandwidth CMOS Current-Feedback Operational Amplifier”, Proceedings of Canadian Conference on Electrical and Computer Engineering, pp. 73-76, 2003.

  • J. Zhu, M. Sawan and K. Arabi, “An Offset Compensated CMOS Current-Feedback Operational Amplifier”, Proceedings of IEEE International Symposium on Circuits and Systems, pp. 1552-1555, 1995.

  • A.M. Ismail and A.M. Soliman, “Novel CMOS Current Feedback Op-Amp Realization Suitable for High Frequency Applications” , IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, Vol. 47, No. 6, pp. 918-921, 2000.

  • S. Selvanayagam and F.J. Lidgey, “Wide Bandwidth CMOS Current Feedback Op-Amp for Inverting Applications”, IEEE Electronics Letters Journal, pp. 1-4, 1996.

  • Alison Payne and Chris Toumazou, “Analog Amplifiers: Classification and Generalization”, IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, Vol. 43, No. 1, pp. 43-50, 1996.

  • Rafael Cabeza and Alfonso Carlosena, “Analog Universal Active Device: Theory, Design and Applications”, Analog Integrated Circuits and Signal Processing, Vol. 12, No. 2, pp. 153-168, 1997.

  • H. Schmid, “The Current-Feedback OTA” , Proceedings of IEEE International Symposium on Circuits and Systems, pp.655-658, 2001.

  • P.E. Allen and D.R. Holberg, “CMOS Analog Circuit Design”, 2nd Edition, Oxford University Press, 2004.

  • T. Singh, M. Kaur and G. Singh, “Design and Analysis of CMOS Folded-Cascode OTA using Gm/Id Technique”, International Journal of Electronics and Computer Science Engineering, Vol. 1, No. 2, pp. 727-733, 2012.


Abstract Views: 336

PDF Views: 6




  • Design and Simulation of Current Feedback Operational Amplifier in 180nm and 90nm CMOs Processes

Abstract Views: 336  |  PDF Views: 6

Authors

C. S. Sajin
Department of Electronics and Communication Engineering, LBS Centre for Science and Technology, India
M. R. Ramrosh
Department of Electronics and Communication Engineering, T.K.M. College of Engineering, India
T. A. Shahul Hameed
Department of Electronics and Communication Engineering, T.K.M. College of Engineering, India

Abstract


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.

Keywords


CFOA, Class AB Buffer, Extended Bandwidth.

References