Electronically Tunable Fully-Differential Fractional-Order Low-Pass Filter

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Date
2017-06-16
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Advisor
Referee
Mark
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Publisher
Kaunas University of Technology
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Abstract
The paper presents proposal of a fully- differential (1 + )-order low-pass filter. The order of the filter and its cut-off frequency can be controlled electronically. The filter is proposed using operational transconductance amplifiers (OTAs), adjustable current amplifiers (ACAs) and fully-differential current follower (FD-CF). The circuit structure is based on well-known Inverse Follow-the-Leader Feedback (IFLF) topology. Design correctness of the proposed filter is supported by PSpice simulations with transistor-level simulation models. The ability of the electronic control of the order has been tested for five individual values of parameter . Furthermore, the ability of the electronic control of the cut-off frequency of the filter has been also tested for five different values. Additionally, the simulation results of the proposed fully-differential (F-D) filter are compared with the results of the single-ended (S-E) equivalent of the presented filter.
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Citation
Elektronika Ir Elektrotechnika. 2017, vol. 23, issue 3, p. 47-54.
https://eejournal.ktu.lt/index.php/elt/article/view/18332
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Peer-reviewed
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en
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Creative Commons Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
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