New amplitude controllable current-mode quadrature oscillator using DO-CDTAs

Abstract

This article presents new amplitude controllable sinusoidal quadrature oscillator circuit using dual-output CDTAs which able to give four quadrature output current signals. The condition of oscillation (CO) is able to be orthogonally tuned from the frequency of oscillation (FO) by handling the external current biasing. The output ports of proposed circuit have high impedance reasonable for connecting with current-mode circuit and use only grounded component very neat for development into an integrated circuit (IC). Moreover, the QO can adjust amplitude of signals without effect from the CO and FO. The PSPICE simulation program uses for proving the theoretical analysis.