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A theoretical study of the stability of high frequency current feedback op-amp integrators

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2 Author(s)
Mahattanakul, J. ; Fac. of Eng., Mahanakorn Univ. of Technol., Thailand ; Toumazou, C.

In this paper, we present a comprehensive theoretical study of the stability of current feedback op-amps, when used with both resistive and capacitive feedback. The paper identifies some of the more subtle features of designing with current feedback op-amps, and the impact these features have on the amplifiers stability. There is a common misconception that the current feedback op-amp will oscillate when connected as a classical active R-C integrator; in this paper we prove that this is not necessarily the case and theoretically demonstrate that under certain design conditions the current feedback op-amp has in fact enormous potential for high frequency integrator design. Theoretical analysis is confirmed by both simulation and measured results using commercially available current feedback op-amps, and comparisons are made with classical voltage-mode op-amps

Published in:

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on  (Volume:43 ,  Issue: 1 )

Date of Publication:

Jan 1996

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