Automatic tuning algorithms for active filters

To meet filter response specifications active filters usually must be tuned or adjusted, preferably by computer automation if the production level is high. In this paper, three generalized tuning algorithms which have appeared in recent literature are comparatively reviewed on the basis of their architecture, computational complexity, and effectiveness. Furthermore, a new method is presented for the tuning resistor and frequency selection problem, a problem relevant to all three methods. Two Monte Carlo simulation examples enhance the comparison and provide a demonstration.