Feedback analysis of transimpedance operational amplifier circuits

Publication: Research - peer-reviewJournal article – Annual report year: 1993

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Feedback analysis of transimpedance operational amplifier circuits. / Bruun, Erik.

In: IEEE Transactions on Circuits And Systems Part I: Regular Papers, Vol. 40, No. 4, 1993, p. 275-278.

Publication: Research - peer-reviewJournal article – Annual report year: 1993

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Author

Bruun, Erik / Feedback analysis of transimpedance operational amplifier circuits.

In: IEEE Transactions on Circuits And Systems Part I: Regular Papers, Vol. 40, No. 4, 1993, p. 275-278.

Publication: Research - peer-reviewJournal article – Annual report year: 1993

Bibtex

@article{a4fcf95b3c35468588043f4fb8df8928,
title = "Feedback analysis of transimpedance operational amplifier circuits",
publisher = "IEEE Circuits and Systems Society",
author = "Erik Bruun",
note = "Copyright: 1993 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE",
year = "1993",
doi = "10.1109/81.224302",
volume = "40",
number = "4",
pages = "275--278",
journal = "IEEE Transactions on Circuits And Systems Part I: Regular Papers",
issn = "1057-7122",

}

RIS

TY - JOUR

T1 - Feedback analysis of transimpedance operational amplifier circuits

A1 - Bruun,Erik

AU - Bruun,Erik

PB - IEEE Circuits and Systems Society

PY - 1993

Y1 - 1993

N2 - The transimpedance or current feedback operational amplifier (CFB op-amp) is reviewed and compared to a conventional voltage mode op-amp using an analysis emphasizing the basic feedback characteristics of the circuit. With this approach the paradox of the constant bandwidth obtained from CFB op-amps is explained. It is demonstrated in a simple manner that the constant gain-bandwidth product of the conventional op-amp and the constant bandwidth of the CFB op-amp are both in accordance with basic feedback theory and that the differences between the traditional op-amp and the CFB op-amp are due to different ways of controlling the closed-loop gain. For the traditional op-amp the closed-loop gain is altered by altering the loop gain, whereas the closed-loop gain in a CFB op-amp configuration is altered by altering the input attenuation to the feedback loop while maintaining a constant-loop gain

AB - The transimpedance or current feedback operational amplifier (CFB op-amp) is reviewed and compared to a conventional voltage mode op-amp using an analysis emphasizing the basic feedback characteristics of the circuit. With this approach the paradox of the constant bandwidth obtained from CFB op-amps is explained. It is demonstrated in a simple manner that the constant gain-bandwidth product of the conventional op-amp and the constant bandwidth of the CFB op-amp are both in accordance with basic feedback theory and that the differences between the traditional op-amp and the CFB op-amp are due to different ways of controlling the closed-loop gain. For the traditional op-amp the closed-loop gain is altered by altering the loop gain, whereas the closed-loop gain in a CFB op-amp configuration is altered by altering the input attenuation to the feedback loop while maintaining a constant-loop gain

U2 - 10.1109/81.224302

DO - 10.1109/81.224302

JO - IEEE Transactions on Circuits And Systems Part I: Regular Papers

JF - IEEE Transactions on Circuits And Systems Part I: Regular Papers

SN - 1057-7122

IS - 4

VL - 40

SP - 275

EP - 278

ER -