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Electronically tunable CMOS class-AB output stage

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Abstract

A new technique for CMOS class-AB output stages is introduced in this Letter. The technique uses a master–slave configuration of a complementary common-source output stage. It offers the advantage that the quiescent and minimum currents of the output stage can be independently tuned. The effectiveness of the proposed technique was verified by simulations using a standard n-well 0.18 μm CMOS process with 1 V supply voltage. A voltage buffer, that includes the proposed output stage, is able to drive a capacitive load of 0.5 nF obtaining −63 dB total harmonic distortion. The topology features also power efficiency of about 63% for a pure resistive output load equal to 50 Ω.

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References

  • Bruschi, P., Navarrini, D., & Piotto, M. (2003). A high current drive CMOS output stage with a tunable quiescent current limiting circuit. IEEE Journal of Solid-State Circuits, 38(8), 1416–1420.

    Article  Google Scholar 

  • Cascella, D., Cannone, F., Avitabile, G., & Coviello, G. (2010). A 94 dB 1.6 GHz SiGe fully differential operational amplifier using a novel class AB output stage. In 53rd IEEE International Midwest Symposium on Circuits and Systems (MWSCAS), pp. 961–964.

  • De Langen, K.-J., & Huijsing, J. H. (1998). Compact low-voltage power-efficient operational amplifier cells for VLSI. IEEE Journal of Solid-State Circuits, 33(10), 1482–1496.

    Article  Google Scholar 

  • Palmisano, G., Palumbo, G., & Salerno, R. (2000). CMOS output stages for low-voltage power supplies. IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, 47(2), 96–104.

    Article  Google Scholar 

  • Sakurai, S., & Ismail, M. (1997). Low-voltage CMOS operational amplifiers, theory, design and implementation. Massachusetts: Kluwer Academic Publishers.

    Google Scholar 

  • Torralba, A., Carvajal, R. G., Ramírez-Angulo, J., Tombs, J., Muñoz, F., & Galan, J. A. (2003). Class AB output stages for low voltage CMOS Opamps with accurate quiescent current control by means of dynamic biasing. Analog Integrated Circuits and Signal Processing, 36(1–2), 69–77.

    Article  Google Scholar 

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Authors and Affiliations

  1. Electronics Laboratory, Department of Physics, University of Patras, GR-26504, Rio, Patras, Greece

    S. Vlassis

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  1. S. Vlassis
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Correspondence to S. Vlassis.

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Vlassis, S. Electronically tunable CMOS class-AB output stage. Analog Integr Circ Sig Process 70, 455–459 (2012). https://doi.org/10.1007/s10470-011-9740-4

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  • DOI: https://doi.org/10.1007/s10470-011-9740-4

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