Analog Integrated Circuits and Signal Processing

, Volume 74, Issue 2, pp 479–483 | Cite as

Phase-margin enhancement technique for recycling folded cascode amplifier

Mixed Signal Letter

Abstract

A novel circuit technique for enhancing the phase-margin of the recycling folded cascode amplifier is presented. Compared to the conventional recycling folded cascade, using a high-speed current mirror, the proposed amplifier offers the advantage of cancellation of the first non-dominant pole, allowing the phase-margin to be enhanced without affecting the bandwidth. The proposed amplifier was implemented in CSMC standard 0.18 μm CMOS process. Simulation results show that the phase-margin enhancement of 20° is achieved without limiting the bandwidth.

Keywords

Phase-margin enhancement Recycling folded cascode amplifier High-speed current mirror 

References

  1. 1.
    Qian, C., Parramon, J., & Sanchez-Sinencio, E. (2011). A micropower low-noise neural recording front-end circuit for epileptic seizure detection. IEEE JSSC, 46(6), 1392–1405.Google Scholar
  2. 2.
    Assaad, R., & Silva-Martinez, J. (2007). Enhancing general performance of folded cascode amplifier by recycling current. Electronic Letter, 43(23), 1428–1429.CrossRefGoogle Scholar
  3. 3.
    Assaad, R., & Silva-Martinez, J. (2009). The recycling folded cascode: A general enhancement of the folded cascode amplifier. IEEE JSSC, 44(9), 2535–2542.Google Scholar
  4. 4.
    Li, Y. L., Han, K. F., Tan, X., Yan N., & Min, H. (2007). Transconductance enhancement method for operational transconductance amplifiers. Electronic Letter, 46(19), 1321–1323.CrossRefGoogle Scholar
  5. 5.
    Yan, Z., Mak, P.-I., & Martins, R. P. (2012). Double recycling technique for folded-cascode OTA. Analog Integrated Circuits and Signal Processing, 71(1), 137–141.CrossRefGoogle Scholar
  6. 6.
    Voo, T., & Toumazou, C. (1995). High-speed current mirror resistive compensation technique. Electronic Letter, 31(4), 248–250.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  1. 1.Institute of MicroelectronicsTsinghua UniversityBeijingPeople’s Republic of China

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