An electronically tunable sinusoidal oscillator suitable for high frequencies operation based on a single dual-output variable-gain CCII
A novel sinusoidal oscillator, constructed from only one CCII with variable current gain, is presented and analyzed. The oscillator provides electronically tunable frequency, with good stability and low sensitivities, while variation of current gain does not affect the condition of oscillations. By the proposed circuit topology, the parasitic elements which exist at current conveyor terminals are absorbed by the external components and their action is diminished. Moreover, the parasitic poles of the current conveyor are taken into account and compensation technique and design criteria are applied, so that the oscillator can operate above 35 MHz.
oscillators current mode oscillators