Linear Sinusoidal Voltage Controlled Oscillators (VCOs) Using Current Conveyor I+(CCI+)
Praween Sinha and Aanchal Garg
Design of 9 Voltage Controlled Oscillators whose output frequency varies linearly with input DC voltage has been proposed. The output oscillations are sinusoidal in nature. The circuits proposed employ only single Current Conveyor I+(CCI+) with two analogue multipliers (AM) in contrast to previous circuits available in literature which employ at least two CFOAs. Moreover, the passive component count is also less. The correctness of the proposed circuits is complemented by PSPICE simulations using AD844 based CFOA and AD734 AMs.
Keywords: Analogue Multipliers (AMs), Current Conveyors I+(CCI+), Linear Voltage Controlled Oscillators (VCOs)