Advertisement

Analog Integrated Circuits and Signal Processing

, Volume 98, Issue 2, pp 265–276 | Cite as

Oscillating quiescent point in power amplifier biasing

  • Sunil M. MuthaEmail author
  • B. S. Umre
Article
  • 19 Downloads

Abstract

Biasing is an essential feature of any electronic circuit. The traditional method of biasing involves applying a proper DC to fix the operating point and thereafter ensure its stability. In this paper, we have proposed a new concept of transistor biasing. Instead of a fixed quiescent point which is normally established by giving DC input to the transistor for the purpose of biasing, we have proposed an oscillating quiescent point by giving square wave biasing input, so that the quiescent point would be oscillating between the two ends of the load line. During the positive half cycle of the input signal the quiescent point would be at the bottom of the load line near the cutoff region, while during negative half cycle of the input signal, the quiescent point would be at the top of the load line near the saturation region, thereby giving full cycle operation for the signal excursion in the active region. The linear range of amplification is better exploited to give higher amplification with negligible distortion and high efficiency.

Keywords

Biasing Load line Oscillating quiescent point Power amplifier Quiescent point 

References

  1. 1.
    Akbarpour, M., Ghannouchi, F. M., & Helaoui, M. (2017). Current-biasing of power-amplifier transistors and its application for ultra-wideband high efficiency at power back-off. IEEE Transactions on Microwave Theory and Techniques, 65(4), 1257–1271.CrossRefGoogle Scholar
  2. 2.
    Narendra, K., & Yewkok, T. (2014). Optimised high-efficiency Class E radio frequency power amplifier for wide bandwidth and high harmonics suppression. IET Circuits, Devices and Systems, 8(2), 82–89.CrossRefGoogle Scholar
  3. 3.
    Zhao, C., Park, B., Cho, Y., & Kim, B. (2013). Analysis and design of CMOS Doherty power amplifier using voltage combining method. In 2013 IEEE international wireless symposium (IWS), Beijing (pp. 1–4).Google Scholar
  4. 4.
    Chen, P., Merrick, B. M., & Brazil, T. J. (2015). Bayesian optimization for broadband high-efficiency power amplifier designs. IEEE Transactions on Microwave Theory and Techniques, 63(12), 4263–4272.CrossRefGoogle Scholar
  5. 5.
    Yang, M., Xia, J., Guo, Y., & Zhu, A. (2016). Highly efficient broadband continuous inverse class-f power amplifier design using modified elliptic low-pass filtering matching network. IEEE Transactions on Microwave Theory and Techniques, 64(5), 1515–1525.CrossRefGoogle Scholar
  6. 6.
    Ye, F., Chiang, J.-S., Chen, C.-W., & Sung, Y.-C. (2004). Dynamic bias circuits for efficiency improvement of RF power amplifier. Tamkang Journal of Science and Engineering, 7(3), 183–188.Google Scholar
  7. 7.
    Millman, J., & Halkias, C. C. (1986). “Power circuits and systems” in integrated electronics, international students edition (pp. 677–724). Singapore: McGraw Hill.Google Scholar
  8. 8.
    Jeon, Y. S., Cha, J., & Nam, S. (2007). High efficiency power amplifier using novel dynamics bias switching. IEEE Transactions on Microwave Theory and Techniques, 55(4), 690–696.CrossRefGoogle Scholar
  9. 9.
    Jang, H., Roblin, P., Quindroit, C., Lin, Y., & Pond, R. D. (2014). Asymmetric doherty power amplifier designed using model-based nonlinear embedding. IEEE Transactions on Microwave Theory and Techniques, 62(12), 3436–3451.CrossRefGoogle Scholar
  10. 10.
    Molundi, S., & Abidi, A. A. (2013). The outphasing RF power amplifier: a comprehensive analysis and a class—B CMOS realization. IEEE Journal of Solid-State Circuits, 48(6), 1357–1369.CrossRefGoogle Scholar
  11. 11.
    Wallenhauer, C., Gottlieb, B., Zeichfubl, R., & Kappel, A. (2010). Efficiency improved high-voltage analog power amplifier for driving piezoelectric actuators. IEEE Transactions of Circuits Systems I: Regular Papers, 57(1), 291–298.MathSciNetCrossRefGoogle Scholar
  12. 12.
    Lv, J., Zhou, Y., Zhang, D. L., & Jiang, Y. D. (2010). A low noise compact class AB buffer amplifier with accurate quiescent current control. Analog Integrated Circuits and Signal Processing, 65, 283–288.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Electrical EngineeringVisvesvaraya National Institute of TechnologyNagpurIndia

Personalised recommendations