Dual-Mode Tunable First-Order Universal Filters with Single VDGA

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dc.contributor.authorRoongmuanpha, Natchanai
dc.contributor.authorPukkalanun, Tattaya
dc.contributor.authorTangsrirat, Worapong
dc.date.accessioned2026-08-06T10:43:57Z
dc.date.available2026-08-06T10:43:57Z
dc.date.issued2024-01-01
dc.description.abstractThis article explores two compact structures to implement dual-mode first-order universal filters, providing lowpass, highpass, and allpass responses from the same structure. Both circuits offer savings in active components as they employ a single voltage differencing gain amplifier (VDGA). The first proposed filter has voltage inputs and current/voltage outputs with a single capacitor, which can perform three distinct filter functions in both voltage mode (VM) and trans-admittance mode (TAM). The latter filter, with current inputs and current/voltage outputs, consists of one capacitor and one resistor, which is capable of operating in both current mode (CM) and trans-impedance mode (TIM). Both of the proposed filters also offer an electronic adjustment of the passband gain and pole frequency through the VDGA’s transconductance values. The non-ideal implications of the VDGA on the first-order filters' performance are thoroughly examined. Computer simulations and experimental testing measurements validate the theoretical analyses.
dc.identifier.citationEngineering Letters, 32(9), 1783-1793, 2024
dc.identifier.issn1816093X
dc.identifier.other2-s2.0-85203267076
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/15075
dc.sourceEngineering Letters
dc.subjectdual-mode circuit
dc.subjectelectronically tunable
dc.subjectfirst-order filter
dc.subjectuniversal filter
dc.subjectvoltage differencing gain amplifier (VDGA)
dc.titleDual-Mode Tunable First-Order Universal Filters with Single VDGA
dc.typeArticle

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