Design of Low Offset Voltage in Second Stage CMOS Operational Amplifier using 90nm Technology

G. Appala Naidu*
Department of Electronics and Communication Engineering, JNTU-GV, College of Engineering Vizianagaram, Andhra Pradesh, India.
Periodicity:January - June'2022
DOI : https://doi.org/10.26634/jcir.10.1.18616

Abstract

In this paper a low offset voltage; low power and high gain second stage op-amp of differential amplifier along with common source amplifier with compensated capacitor is proposed. The mathematical analysis of two-stage op-amp is elaborated and this work is compared with exiting similar work. The experimental work carried in CADENCE Virtuoso with 0 gpdk090 process technology is used to obtain 60.994 of Phase Margin, 61 dB DC gain and Offset voltage is 2mV. The M/L ratios are selected accordingly where supply voltage and load voltage are fixed at 1.8V and 12pF respectively. The parametric analysis helps, where the values are fixed to get better response.

Keywords

Op-amp, Offset Voltage, Phase Margin, Parametric Analysis.

How to Cite this Article?

Naidu, G. A. (2022). Design of Low Offset Voltage in Second Stage CMOS Operational Amplifier using 90nm Technology. i-manager’s Journal on Circuits and Systems, 10(1), 43-48. https://doi.org/10.26634/jcir.10.1.18616

References

[1]. Abdullah-Al-Kaiser, M., & Jarin, I. (2017). High gain low offset faster two stage CMOS op-amp and effects of aspect ratios on gain. In 2017 IEEE International WIE Conference on Electrical and Computer Engineering (WIECON-ECE), 253-256. https://doi.org/10.1109/WIECON-ECE.2017.8468913
[2]. Allen, P. E., & Holmberg, D. R. (2002). CMOS Analog Circuit Design, 2nd Edition. Oxford University Press, New York.
[3]. Baruah, R. K. (2010). Design of a low power, low voltage CMOS op-amp. International Journal of VLSI Design and Communication System (VLSICS), l (1). https://doi.org/10.5121/vlsic.2010.1101
[4]. Chowdhury, S. A., Bose, O. P., & Hossain, Q. D. (2018). Design of a Two Stage CMOS Operational Amplifier in 100nm Technology with Low Offset Voltage. In 2018 International Conference on Innovations in Science, Engineering and Technology (ICISET), 56-59. https://doi.org/10.1109/ICISET.2018.8745659
[5]. Davidovic, M. D. (1999). A simple proof of Miller's theorem. IEEE Transactions on Education, 42(2), 154-155. http:/doi.org/10.1109/13.762956
[6]. Enz, C. C., & Temes, G. C. (1996). Circuit techniques for reducing the effects of op-amp imperfections: Auto zeroing, correlated double sampling, and chopper stabilization. Proceedings of the IEEE, 84(11), 1584-1614. http:/doi.org/10.1109/5.542410
[7]. Lu, C. W. (2007). An offset cancellation technique for two-stage CMOS operational amplifiers. In 2007 IEEE International Conference on Integrated Circuit Design and Technology, 1-3. http:/doi.org/10.1109/ICICDT.2007.4299561
[8]. Millman, J., & Halkias, C. C. (1972). Integrated Electronics: Analog and Digital Circuits and Systems, McGraw-Hill, New York.
[9]. Razavi, B. (2001). Design of Analog CMOS Integrated Circuits. McGraw-Hill.
[10]. Sedra, A. S., & Smith, K. C. (2004). Microelectronic Circuits. Oxford University Press, New York.
[11]. Shankar, C., & Kaur, M. (2010). Stability and bandwidth enhancement of two stage op-amp using negative capacitance generation. International Journal of Micro and Nano Electronics, Circuits and Systems, 2(2), 113-118.
[12]. Witte, F., Makinwa, K. A. A., & Huijsing, J. (2009). Dynamic Offset Compensated CMOS Amplifiers. Springer, New York, (6-37).
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