New realization of third order sinusoidal oscillator using single OTRA

In this paper, a new, single operational transresistance amplifier (OTRA) based third order sinusoidal oscillator is presented. The nonideal behavior of proposed structure has been analyzed using single and double pole models of the OTRA. It is observed that for high-frequency applications the effect of nonidealities may be eliminated through self-compensation. Active and passive sensitivities are computed for the proposed structure and are found to be less than unity rendering proposed circuit insensitive to component variations. Workability of the proposed oscillator is verified through Analog Design Environment (ADE) spectre tool provided by cadence virtuoso using 0.18 μm CMOS process parameters. Monte Carlo analysis is also carried for the proposed structure. Total harmonic distortion (THD) is found to be less than 2.6%. Post layout simulations; experimental results are also included to validate the theory.