CC-CCTA-Based Current-mode Quadrature Oscillator

This article presents a current-mode quadrature oscillator using current controlled current conveyor transconductance amplifiers (CC-CCTAs) as active elements. The proposed circuit is realized from a lossy integrator and a lossy differentiator. The oscillation condition and oscillation frequency can be electronically controlled via input bias currents. The proposed oscillator can be applied to provide AM/ASK signals with the above major advantages. The circuit description is very simple, consisting of merely 2 CC-CCTAs and 2 grounded capacitors. By absent of any external resistors and using a few number of external passive components, the proposed circuit is then suitable for IC architecture. The proposed circuit, due to high output impedances, enabling easy cascading in current-mode signal processing. The PSPICE simulation results are depicted, and the given results agree well with the theoretical anticipation. The power consumption is approximately 3.06mW at ±1.5V supply voltages.