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Microsystem Technologies

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11-05-2016 | Technical Paper

Ultra high gain CMOS Op-Amp design using self-cascoding and positive feedback

Authors: Subhra Chakraborty, Abhishek Pandey, Vijay Nath

Published in: Microsystem Technologies | Issue 3/2017

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Abstract

This paper presents an ultra high gain two stage CMOS Operational Amplifier which is designed using self-cascoding and positive feedback technique in order to provide gain enhancement. By comparing the circuit with other designed circuits it has been shown that applying positive feedback increases the gain of the Op-Amp without affecting other properties of the amplifier. The proposed circuit is designed in 45 nm technology using Cadence Virtuoso Analog Design Environment tool at ±1 V supply. The Op-Amp is designed to achieve a high gain of 141 dB while maintaining a UGB of 101 MHz and phase margin of 60°. The simulation results conforms the estimated theoretical improvements. The dependence of various properties such as slew rate, UGB, settling time and phase margin of the designed Op-Amp on compensating capacitor C_C has also been analyzed in this paper. Finally, the simulation results have been compared with a previously reported Op-Amp utilizing positive feedback technique.

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Ahmadi MM (2006) A new modeling and optimization of gain-boosted cascode amplifier for high-speed and low-voltage applications. IEEE Trans Circuits Syst II Express Briefs 53(3):169–173. doi:10.1109/TCSII.2005.858493 MathSciNetCrossRef

Allen PE, Holberg DR (2002) CMOS analog circuit design, 2nd edn. Oxford University Press, New York

Allstot D (1982) A precision variable supply CMOS comparator. IEEE J Solid-state Circuits 17(6):1080–1087. doi:10.1109/JSSC.1982.1051864 CrossRef

Amourah MM, Geiger RL (2001) A high gain strategy with positive-feedback gain enhancement technique. In: IEEE international symposium on circuits and systems vol 1, pp 631–634. 6–9 May 2001 Sydney, NSW. doi:10.1109/ISCAS.2001.921935

Amourah MM, Geiger RL (2002) All digital transistor high gain operational amplifier using positive feedback technique. In: IEEE international symposium on circuits and systems (ISCAS) vol 1, pp 701–704. doi:10.1109/ISCAS.2002.1009937

Assaad RS, Silva-Martinez J (2009) The recycling folded cascode: a general enhancement of the folded cascode amplifier. IEEE J Solid-State Circuits 44:2535–2542. doi:10.1109/JSSC.2009.2024819 CrossRef

Baker RJ (2005) CMOS: circuit design, layout, and simulation, 2nd edn. Wiley, New York

Chakraborty S, Pandey A, Nath V (2015a) A novel 116 dB operational amplifier design using positive feedback. In: IEEE international conference on electrical, electronics, signals, communication and optimization (EESCO) pp 1–4. 24–25 Jan 2015 Visakhapatnam India. doi:10.1109/EESCO.2015.7253640

Chakraborty S, Pandey A, Nath N (2015b) A highly linear and high gain operational amplifier. In: IEEE international conference on electrical, electronics, signals, communication and optimization (EESCO), pp 1–4, 24–25 Jan 2015 Visakhapatnam India. doi:10.1109/EESCO.2015.7253641

Comer DJ, Comer DT, Petrie CS (2004) The utility of the composite cascode in analog CMOS design. Int J Electron 91(8):491–502. doi:10.1080/00207210412331314196 CrossRef

Comer DT, Comer DJ, Li L (2010a) A high-gain complementary metal-oxide semiconductor Op-Amp using composite cascode stages. Int J Electron 97(6):637–646. doi:10.1080/00207211003646928 CrossRef

Comer D, Comer D, Singh R (2010) A high-gain, low-power CMOS Op-Amp using composite cascode stages. In: 53rd IEEE international Midwest symposium on circuits and systems (MWSCAS), pp 600–603, 1–4 Aug 2010, Seattle, WA. doi:10.1109/MWSCAS.2010.5548897

Dadashi A, Sadrafshari S, Hadidi K, Khoei A (2011) An enhanced folded cascode Op-Amp using positive feedback and bulk amplification in 0.35 μm CMOS process. Analog Integr Circ Sig Process 67(2):213–222. doi:10.1007/s10470-010-9561-x CrossRef

Dadashi A, Sadrafshari S, Hadidi K, Khoei A (2012) Fast-settling CMOS Op-Amp with improved DC-gain. Analog Integr Circ Sig Process 70:283–292. doi:10.1007/s10470-011-9668-8 CrossRef

Khameh H, Mirzaie H, Shamsi H (2010) New two-stage Op-Amp using hybrid cascode compensation, bulk-driven, and positive feedback techniques. In: Proceeding of 8th IEEE international NEWCAS conference 109–112. 20–23 June 2010, Montreal, QC. doi:10.1109/NEWCAS.2010.5603711

Pude M, Mukund PR, Singh P, Paradis K, Burleson J (2010) Amplifier gain enhancement with positive feedback. In: 53rd IEEE international Midwest symposium circuits and systems (MWSCAS) 981–984. 1–4 Aug 2010 Seattle, WA. doi:10.1109/MWSCAS.2010.5548800

Purcell J, Abdel-Aty-Zohdy HS (1997) Compact high gain CMOS Op-Amp design using comparators. In: Proceedings of the 40th IEEE Midwest symposium on circuits and systems vol 2, pp 1050–1052. doi:10.1109/MWSCAS.1997.662257

Rajput S, Jamuar S (2002) Low voltage analog circuit design techniques. IEEE Circuits Syst Mag 2(1):24–42. doi:10.1109/MCAS.2002.999703 CrossRef

Ramírez-Angulo J, Calvo B, Carvajal RG, López-Martin A (2010) Low-voltage gm-enhanced CMOS differential pairs using positive feedback. In: Proceedings of IEEE international symposium on circuits and systems (ISCAS), 773–776. 30 May–2 June 2010, Paris. doi:10.1109/ISCAS.2010.5537459

Razavi B (2001) Design of analog CMOS integrated circuits. McGraw-Hill, New York

Schlarmann ME, Malik SQ, Geiger RL (2002) Positive feedback gain-enhancement techniques for amplifier design. In: IEEE international symposium on circuits and systems vol 2, pp 37–40. 26–29 May 2002 Phoenix-Scottsdale, AZ. doi:10.1109/ISCAS.2002.1010917

Taherzadeh-Sani M, Hamoui AA (2011) A 1-V process-insensitive current-scalable two-stage opamp with enhanced DC gain and settling behavior in 65-nm digital CMOS. IEEE J Solid-State Circuits 46(3):660–668. doi:10.1109/JSSC.2010.2100270 CrossRef

Tran PT, Hess HL, Noren KV, Ay S (2010) Gain-enhancement differential amplifier using positive feedback. In: 55th IEEE international Midwest symposium on circuits and systems (MWSCAS), pp 718–721. 5–8 Aug 2012, Boise, ID. doi:10.1109/MWSCAS.2012.6292121

Wang R, Harjani R (1995) Partial positive feedback for gain enhancement of low-power CMOS OTAs. Analog Integr Circuits Signal Process Special Issue 8(1):21–35. doi:10.1007/BF01239377 CrossRef

Young KH, Sequin CH, Gray PR (1988) Automatic layout generation for CMOS operational amplifiers. In: Computer-aided design ICCAD-88 IEEE international conference on digest of technical papers 548–551, 7–10 Nov 1988 Santa Clara, CA, USA, doi:10.1109/ICCAD.1988.122568

Title: Ultra high gain CMOS Op-Amp design using self-cascoding and positive feedback
Authors: Subhra Chakraborty
Abhishek Pandey
Vijay Nath
Publication date: 11-05-2016
Publisher: Springer Berlin Heidelberg
Published in: Microsystem Technologies / Issue 3/2017
Print ISSN: 0946-7076
Electronic ISSN: 1432-1858
DOI: https://doi.org/10.1007/s00542-016-2971-7

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