APPROACH TO THE SYNTHESIS OF CANONIC RC-ACTIVE OSCILLATORS USING CCII

A systematic approach has been employed to synthesise sinusoidal RC-active oscillators using second-generation current conveyor (CCII). The resulting topologies are canonic, i.e. they require the minimum number of active (a single CCII) and passive components (two capacitors and either two or three resistors) for realisation of both single-frequency oscillators (SFOs) and variable-frequency oscillators (VFOs). Oscillation condition (OC) and/or oscillation frequency (OF) can be adjusted using single resistors. It is shown that using a CCII as the active device provides RC oscillators with a minimum passive network (N(GC)). The configurations obtained have been classified in four groups in accordance to their coupling level between the OC and FO equations. Stability has been studied. All the oscillators have been tested and experimental results show very close agreement with the theoretical analysis.