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

  • Authors:

  • R. Wu;F. J. Lidgey;K. Hayatleh

  • Affiliations:

  • School of Technology, Oxford Brookes University, Headington, Oxford OX3 0BP, U.K.;School of Technology, Oxford Brookes University, Headington, Oxford OX3 0BP, U.K. lidgey@brookes.ac.uk;School of Technology, Oxford Brookes University, Headington, Oxford OX3 0BP, U.K.

  • Venue:
  • Analog Integrated Circuits and Signal Processing
  • Year:
  • 2004

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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.