CFOA-based quadrature oscillator employing grounded capacitors

This paper presents a novel voltage-mode quadrature sinusoidal oscillator employing current-feedback operational amplifier (CFOA) as an active building block. The proposed circuit employs two CFOAs with the minimum number of passive elements, namely two resistors and two grounded capacitors. The use of only grounded capacitors makes the proposed circuit ideal for integrated circuit implementation. The proposed circuit offers the advantages of orthogonal control of the condition of oscillation and frequency of oscillation, availability of two quadrature voltage outputs and low active and passive sensitivity performances. Experimental results are included.