Reduction of characteristic deviations due to parasitic elements on integrator-based filters

This paper proposes a method for reducing a characteristic deviation due to parasitic elements on an integrator-based filter. The integrator-based filter needs some self-feedback integrators. The integrators can be equivalently realized by either lossless or lossy integrators with appropriate feedbacks to their inputs if ideal integrators could be used. The realization leads to circuit structures with different filter characteristic deviations. This paper derives two equations for estimation of the deviations. The equations are applied to realization of a filter which has a small characteristic deviation due to parasitic elements