Abstract
The author presents a current-mode current-controlled third-order quadrature oscillator circuit synthesised from a simple yet novel approach using basic bilinear blocks. The new circuit is more compact than the other third-order oscillators available in the literature and enjoys non-interactive frequency control, use of grounded capacitors and availability of both quadrature current and voltage outputs. PSPICE simulations are performed for the verification of the new circuit. Experimental evidence is further given for completeness sake. The new basic scheme is also useful for realising a quadrature oscillator using other active elements as well.
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