Novel current-mode quadrature oscillators with explicit-current-outputs using CCCDTA

Abstract

The paper presents novel current-mode (CM) quadrature oscillators (QOs) created using the recently proposed active building block (ABB), namely the current controlled current differencing transconductance amplifier (CCCDTA). Two circuits have been proposed and both of them employ minimum components, namely one multipleoutput CCCDTA (MO-CCCDTA) and two grounded capacitors. One of the proposed circuits is suitable to be used as a very low frequency oscillator (VLFO) and the other circuit provides non-interactive CO and FO control and could be used as a variable frequency oscillator (VFO). Both the circuits provide explicit quadrature current outputs. Non-ideal analysis, sensitivity study are provided and PSPICE simulations have been included which verify the workability of the circuit.