Shadow universal filter with independent Q tuning at 0.45 V using MI-OTAs

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dc.contributor.authorKumngern, Montreecs
dc.contributor.authorKhateb, Fabiancs
dc.contributor.authorThanyaratsakul, Nattapongcs
dc.contributor.authorKulej, Tomaszcs
dc.coverage.issueSeptember 2025cs
dc.coverage.volume27cs
dc.date.accessioned2025-09-15T12:55:56Z
dc.date.available2025-09-15T12:55:56Z
dc.date.issued2025-09-01cs
dc.description.abstractThis paper presents a novel shadow universal filter implemented in voltage mode, based on multiple-input operational transconductance amplifiers (MI-OTAs). The proposed shadow universal filter incorporates both non-inverting and inverting transfer functions for low-pass, high-pass, band-pass, band-stop, and all-pass responses within a single topology. The proposed filter is a shadow universal filter that employs low-pass and highpass filters feedback to the input. It enables independent control of the quality factor for all filtering responses through an external amplifier, without altering the natural frequency. Moreover, during quality factor tuning, any variation in passband gain can be compensated by appropriately adjusting the input signal configuration. These advantages of the proposed shadow universal filter are enabled by the multiple-input capability of the operational transconductance amplifier (OTA), which is implemented using the multiple-input bulk-driven MOS transistor (MIBD-MOST) technique. The MI-OTA operates at an ultra-low supply voltage of 0.45 V and consumes only 270 nW of power. For the low-pass shadow filter configuration, a dynamic range of 48 dB was achieved at 1% total harmonic distortion. Experimental validation was conducted using a prototype implemented with commercially available LM13700N integrated circuits, confirming the filter's functionality and effectiveness.en
dc.formattextcs
dc.format.extent1-12cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationResults in Engineering. 2025, vol. 27, issue September 2025, p. 1-12.en
dc.identifier.doi10.1016/j.rineng.2025.106904cs
dc.identifier.issn2590-1230cs
dc.identifier.orcid0000-0002-9864-9830cs
dc.identifier.other198757cs
dc.identifier.researcheridO-6465-2014cs
dc.identifier.scopus36185268100cs
dc.identifier.urihttps://hdl.handle.net/11012/255543
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofResults in Engineeringcs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S2590123025029561cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2590-1230/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectUniversal filteren
dc.subjectShadow filteren
dc.subjectOperational transconductance amplifieren
dc.subjectBulk-driven MOS transistoren
dc.titleShadow universal filter with independent Q tuning at 0.45 V using MI-OTAsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-198757en
sync.item.dbtypeVAVen
sync.item.insts2025.09.15 14:55:56en
sync.item.modts2025.09.15 14:32:40en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav mikroelektronikycs
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