On the Design of Differential Difference Transconductance Amplifier (DDTA) and Its Applications

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dc.contributor.authorChannumsin, Orapin
dc.contributor.authorYaruan, Panurut
dc.contributor.authorTangsrirat, Worapong
dc.date.accessioned2026-08-06T10:54:51Z
dc.date.available2026-08-06T10:54:51Z
dc.date.issued2026-03-01
dc.description.abstractThis paper presents the design and implementation of a novel active building block termed the Differential Difference Transconductance Amplifier (DDTA). The proposed DDTA integrates the characteristics of the Differential Difference Amplifier (DDA) and the Transconductance Amplifier (TA) to enhance flexibility in analog signal processing. It comprises three TA stages—two forming a DDA structure and one functioning as a TA—allowing independent electronic tuning of transconductance gain (gm). The DDTA features a simple architecture, wide input capability, extremely high input impedance, and high output resistance at both intermediate and output current terminals, enabling accurate current-mode signal processing with minimal loading effects. To demonstrate its versatility, a voltage-mode universal biquadratic filter and dual-mode quadrature oscillator, both based on a single DDTA and utilizing only two capacitors, have been designed and simulated. PSPICE simulation results confirm wide linear voltage-to-current conversion, wideband transconductance performance, and robust impedance characteristics, all in excellent agreement with theoretical predictions. These features validate the effectiveness and practicability of the proposed approach for modern analog circuit designs.
dc.identifier.citationInternational Journal of Electrical and Electronic Engineering and Telecommunications, 15(2), 107-115, 2026
dc.identifier.doi10.18178/ijeetc.15.2.107-115
dc.identifier.issn23192518
dc.identifier.other2-s2.0-105032763972
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/17928
dc.sourceInternational Journal of Electrical and Electronic Engineering and Telecommunications
dc.subjectanalog Integrated Circuit (IC)
dc.subjectDifferential Difference Transconductance Amplifier (DDTA)
dc.subjectelectronic tunability
dc.subjectmultifunction filter
dc.subjecttransconductance amplifier
dc.titleOn the Design of Differential Difference Transconductance Amplifier (DDTA) and Its Applications
dc.typeArticle

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