Design of Constant Phase Elements for Adjustable Pseudocapacitance by a Single Driving Voltage Using Integrated Unipolar Transistor Fields

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dc.contributor.authorSotner, Roman
dc.contributor.authorLitovska, Anna
dc.contributor.authorPolak, Ladislav
dc.contributor.authorJerabek, Jan
dc.contributor.authorKledrowetz, Vilem
dc.contributor.authorProkop, Roman
dc.contributor.authorJaikla, Winai
dc.date.accessioned2026-08-06T10:53:47Z
dc.date.available2026-08-06T10:53:47Z
dc.date.issued2026-01-01
dc.description.abstractThis paper presents the design of a passive fractional-order element with tunable pseudocapacitance, enabling adaptable circuit behavior without additional power consumption. This is an important feature for modelling and characterization in natural systems, as well as in the field of electrical and electronic engineering, particularly for the design of instrumentation and sensing systems. The proposed topologies are based on integrated unipolar transistor arrays. Two implementations are demonstrated, with fractional orders of 0.22 and 0.5, offering pseudocapacitance adjustment ranges from 65 to 1 670 mikroF/s^0.78 and from 6.7 to 51 mikroF/s^0.5, respectively. Tuning is achieved through a DC bias voltage ranging from 0.8 to 10 V. The devices operate across nearly two decades of frequency, from approximately 100 Hz to 200 kHz, and support signal amplitudes in the hundreds of millivolts. Two application examples highlight their potential: electronic tuning of the center frequency in a fractional-order band-pass filter, and adjustment of the oscillation frequency in a fractional-order oscillator with a fixed 22.5 degrees phase shift between output waves. All concepts and results are experimentally validated in the laboratory.
dc.identifier.citationIEEE Transactions on Instrumentation and Measurement, 2026
dc.identifier.doi10.1109/TIM.2026.3687310
dc.identifier.issn00189456
dc.identifier.other2-s2.0-105038219947
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/17648
dc.sourceIEEE Transactions on Instrumentation and Measurement
dc.subjectBias voltage adjustment
dc.subjectConstant phase element
dc.subjectElectronic adjustment
dc.subjectFractional-order
dc.subjectMOSFET
dc.subjectPseudokapacity
dc.subjectTunability
dc.titleDesign of Constant Phase Elements for Adjustable Pseudocapacitance by a Single Driving Voltage Using Integrated Unipolar Transistor Fields
dc.typeArticle

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