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Generalization of a Theorem for Replacing CCIIs by CFOAs in Current-Mode Circuits

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Abstract

A current feedback op-amp (CFOA) has the advantage that feedback structures in current-mode circuits are more easily devised because the voltage buffer at the output of the CFOA does not load the output of the integral positive, second-generation current conveyor (CCII+) that constitutes part of the CFOA. In this paper, the changes on the current mode transfer function of a linear circuit composed of a subnetwork \(N\) connected to a CCII+ are determined when the CCII+ is replaced by a CFOA and a feedback component is connected from the output of the CFOA to an independent node of \(N\). Two applications of the results are provided. A new theorem is then presented which generalizes the results. This theorem should be useful for the comparison, synthesis, and improvement of linear current-mode signal processing circuits.

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References

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Authors
  1. Peter Aronhime
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  2. KeChang Wang
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  3. Tongfeng Qian
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Aronhime, P., Wang, K. & Qian, T. Generalization of a Theorem for Replacing CCIIs by CFOAs in Current-Mode Circuits. Analog Integrated Circuits and Signal Processing 28, 27–34 (2001). https://doi.org/10.1023/A:1011289618916

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  • DOI: https://doi.org/10.1023/A:1011289618916

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