A CCII-based wide frequency range square/triangular wave generator

In this paper, we propose a current-mode based solution suitable for triangular/square wave generator using second generation current conveyor. The proposed oscillator, which utilizes two second generation current conveyor (CCII) as active elements, three resistors and a capacitor, is based on resistance-capacitance (RC) cell and found to be effective alternate of voltage-mode based oscillators. Experimental results were obtained by implementing the proposed circuit using commercially available CCII (AD844) and passive components. Simulation and experimental results have confirmed the theoretical expectations, showing good linearity in wide oscillation frequency range. The sensitivity and operating frequency of the proposed oscillator can be adjusted using passive components. The proposed configuration finds useful applications in wide range capacitive/resistive sensor front end.