Special Transfer Section for Selective Rejecting and Amplification of Bands in Equalization
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Date
2024-06-10
Authors
Šotner, Roman
Svoboda, Marek
Semenov, Dmitrii
Polák, Ladislav
Jeřábek, Jan
Theumer, Radek
Jaikla, Winai
0000-0002-2430-1815Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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Abstract
This paper introduces a novel and simple filtering topology for band-reject (notch) and inverse band-reject applications, utilizing two voltage-adjustable operational transconductance amplifiers. The utilization of these active devices enables the implementation of identical topologies for both band-reject and inverse band-reject transfer functions. The resulting responses are harnessed for the cascade synthesis of a specialized comb filter, capable of amplification or attenuating/rejecting specific bands shown on three sub-bands. Both the design of individual sections and the entire cascade have been experimentally verified using active devices manufactured in the TSMC 180 nm CMOS process. Measurements conducted over a range from 10 Hz to 100 kHz demonstrate the importance of the selective filtering, which is significant for various applications, particularly in acoustic, vibration, and magnetic sensing readouts. The example of peaking suppression in magnitude response of emulated environment (acoustic coupling of piezo and microphone) is shown.
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Citation
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS. 2024, vol. 71, issue 9, p. 3986-3998.
https://ieeexplore.ieee.org/document/10552283
https://ieeexplore.ieee.org/document/10552283
Document type
Peer-reviewed
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Accepted version
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Language of document
en
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Date of acceptance
Defence
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(C) IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC