In this work, we propose a resistorless realization of a simple electronically adjustable capacitance multiplier circuit using a single voltage differencing gain amplifier (VDGA) as an active building block. The circuit utilizes one VDGA and only one capacitor in a simple circuit configuration. The proposed capacitance multiplier circuit can be tuned electronically with the adjustment of the transconductance gains of the VDGA. To emphasis the applicability of the proposed circuit, a second-order RC low-pass filter is constructed as an application example. PSPICE simulations are performed to verify the theory.
Elektronsko nastavljiv kapacitivni množilnik z enojnim napetostnim diferencialnim ojačevalnikom (VDGA)Izvleček: V članku je predstavljen enostaven elektronsko nastavljiv kapacitiven množilnik z diferencialnim ojačevalnikom (VDGA) brez uporabe uporov. Vezje vključuje en VDGA in le en kondenzator. Predlagan kapacitivni množilnik je elektronsko nastavljiv s pomočjo spreminjanja transkonduktančnega ojačenja VDGA. Kot primer uporabe je predstavljen nizkopasovni RC filter drugega reda. Teoretični zaključki so preverjeni s PSPICE simulacijami.
Ključne
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