DXCCII-based mixed-mode electronically tunable quadrature oscillator with grounded capacitors

Abstract

A new mixed-mode quadrature oscillator circuit using two dual-X current conveyors (DXCCIIs) and grounded passive components is presented. In the proposed circuit, two quadrature voltage-mode signals and a current-mode sinusoidal waveform are simultaneously available. The oscillation condition and oscillation frequency are independently controllable. Further, electronic tunability i.e. voltage control of the circuit is also discussed. The use of only grounded capacitors makes the proposed circuit suitable for integrated circuit implementation. Results of PSPICE simulation confirm the proposed theory. © 2011 Springer-Verlag Berlin Heidelberg.