A sinusoidal oscillator using single Operational Transresistance Amplifier

This paper illustrates a sinusoidal oscillator based on Operational Transresistance Amplifier (OTRA). The proposed oscillator circuit consists of one OTRA and few passive components to generate the oscillations. The condition of oscillation and frequency of oscillation of the proposed circuit is controlled by a single grounded resistor. CMOS gpdk 180 nm technology was used to test the overall performance of the proposed circuit. The OTRA circuit has been built using commercially available current feedback operational amplifier (AD844 AN) and later passive components are connected externally and tested for waveform generation. The simulated and experimental results are presented and the tunability of the grounded resistor is given. The results obtained demonstrate excellent agreement with theoretical values.