Novel Active-C Voltage-Mode Quadrature Oscillator Realization Employing CCCIIs

Abstract

A current controlled sinusoidal voltage-mode quadrature oscillator circuit is presented which has employed three second generation current controlled conveyors (CCCII) and two grounded capacitors. The condition of oscillation (CO) and frequency of oscillation (FO) of the proposed circuit are uncoupled and can be electronically controllable through an external dc bias current of CCCII. Sensitivities of active and passive elements are very low and the voltage outputs which are in 90^o phase difference have high output impedances. Moreover, if apply the input at terminal Y of CCCII-03 it behaves as biquad filter which produce the band-pass (BP) and low-pass (LP) responses instantaneously and it have high input impedance which is very useful in cascading.  PSPICE simulation has been done to test and verify the workability of the oscillator and filter circuit.