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Frequency Performance Compensation of Operational Amplifiers with the ‘T’ Feedback Network

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Abstract

A simple ‘T’ network can be used in the feedback path of a conventional voltage feedback operational amplifier (VFOA) to avoid using a large feedback resistor. However detailed analysis shows that the bandwidth of amplifier will be degraded. In this paper, a capacitive compensation method for the ‘T’ network is described which yields a significant improvement in closed-loop bandwidth of the amplifier.

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References

  1. D.L. Albean, “'T' feedback ups Op.Amp gain.” Electronic Design, March 4, pp. 86–88, 1996.

  2. A.S. Sedra and K.C. Smith, Microelectronic Circuits, 4th edition. Oxford University Press, 1997.

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Authors and Affiliations

  1. School of Technology, Oxford Brookes University, Headington, Oxford, OX3 0BP, UK

    R. Wu, F.J. Lidgey, F.J. Lidgey & K. Hayatleh

Authors
  1. R. Wu
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  2. F.J. Lidgey
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  3. K. Hayatleh
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Corresponding author

Correspondence to F.J. Lidgey.

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Wu, R., Lidgey, F. & Hayatleh, K. Frequency Performance Compensation of Operational Amplifiers with the ‘T’ Feedback Network. Analog Integrated Circuits and Signal Processing 41, 79–83 (2004). https://doi.org/10.1023/B:ALOG.0000038285.99051.56

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  • DOI: https://doi.org/10.1023/B:ALOG.0000038285.99051.56

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