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Article Dans Une Revue International Journal of Electronics Letters Année : 2020

CMOS voltage and current feedback opamps: a comparison between two similar topologies

Résumé

The voltage feedback operational amplifier (VFOA) and the current feedback operational amplifier (CFOA) are the main voltage type output opamps currently used in electronics. The VFOA is a combination of an operational transconductance amplifier (OTA) used as an input stage and an output voltage buffer (VB). In this paper, the CFOA is described as a combination of an operational transconductance conveyor (OTC) used as an input stage and with an output voltage buffer. Two similar CMOS architectures are then defined, analysed and simulated in order to provide some elements of comparison. Results, from a typical CMOS 0.35μm transistor parameters, show the role of compensation capacitances in boosting the frequency performances of the non-inverting amplifier.
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Dates et versions

hal-02470025 , version 1 (25-08-2022)

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Citer

Herve Barthelemy, Valentin Gies, Stephane Meillere, Remy Vauche, Edith Kussener, et al.. CMOS voltage and current feedback opamps: a comparison between two similar topologies. International Journal of Electronics Letters, 2020, 9 (2), pp.1-16. ⟨10.1080/21681724.2020.1717004⟩. ⟨hal-02470025⟩
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