Abstract
In this paper, the design of low-power, high-speed, two-stage, indirect frequency-compensated operational amplifier is presented. The OPAMP employs split-length devices and class AB output stage. Split-length technique is employed both in load device as well as in differential-pair device. The split-length device enhances the phase margin (PM) and unity gain bandwidth (UGB) while maintaining lower supply voltage. The class AB output stage provides a faster settling time and reduced power dissipation. Simulations of the proposed circuits were carried out in cadence specter on 180-nm process technology at a supply voltage of 1.6 V. The proposed split-length current mirror load OPAMP exhibits power dissipation of 82 µW, UGB of 43.26 MHz, and PM of 79.25°. Similarly, the proposed split-length differential-pair OPAMP exhibits a power dissipation of 78 µW, UGB of 49.71 MHz, and PM of 85.34°.
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References
Allen, P.E., Holberg, D.R.: CMOS Analog Circuit Design, 2nd edn. Oxford University Press, Oxford (2002)
Baker, R.J.: CMOS: Circuit Design, Layout, and Simulation, 2nd edn. Wiley Interscience (2005)
Tsividis, Y., Gray, P.: An integrated NMOS operational amplifier with internal compensation. IEEE J. Solid-State Circuits 11(6), 748–754 (1976)
Ahuja, B.K.: An improved frequency compensation technique for CMOS operational amplifiers. IEEE J. Solid-State Circuits 18, 629–633 (1983)
Hurst, P.J., Lewis, S.H., Keane, J.P.: Miller compensation using current buffers in fully differential CMOS two-stage operational amplifiers. In: IEEE Transactions on Circuits Systems I—Regular Papers, vol. 51, no. 2, Feb 2004
Palmisano, G., Paumbo, G.: A compensation strategy for two-stage CMOS opamps based on current buffer. IEEE Trans. Circuits Syst. I Fundam. Theory Appl. 44(3), 257–262 (1997)
Saxena, V., Baker, R.J.: Compensation of CMOS Op-amps using split-length transistors. Submitted to IEEE International MWSCAS, Aug 2009
Yan, Z., Shen, L., Zhao, Y.: A low-voltage CMOS low-dropout regulator with novel capacitor-multiplier frequency compensation. In: Proceedings of IEEE ISCAS’08, May 2008, pp. 2685–2688
You, F., Embabi, S.H.K., Sanchez-Sinencio, E.: Low-voltage Class-AB buffers with quiescent current control. IEEE J. Solid-State Circuits 33(6), 915–920 (1998)
Torralba, A., Carvajal, R.G., Martinez-Heredia, J., Ramírez Angulo, J.: Class-AB output stage for low voltage CMOS op-amps with accurate quiescent current control. Electron. Lett. 36(21), 1753–1754 (2000)
Aloisi, W., Palumbo, G., Pennisi, S.: Design methodology of Miller frequency compensation with current buffer/amplifiers. IET Proc. Circuits Devices Syst. 2(2), 227–233 (2008)
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Das, S., Mandal, S.K., Rath, A., Dash, S.P. (2015). Low-Power, High-Speed, Indirect Frequency-Compensated OPAMP with Class AB Output Stage in 180-nm CMOS Process Technology. In: Jain, L., Patnaik, S., Ichalkaranje, N. (eds) Intelligent Computing, Communication and Devices. Advances in Intelligent Systems and Computing, vol 308. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2012-1_49
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DOI: https://doi.org/10.1007/978-81-322-2012-1_49
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