Transient management of reconfigurable digital filters in case of sinusoidal excitation

Reconfigurable digital filters are promising solutions to filtering problems in hybrid systems, where digital filters with time-invariant configuration are found to be inappropriate. However, reconfiguration of digital filters causes intermediate disturbances, reconfiguration transients that have to be minimized by proper transient management. In this paper, the one-step reconfiguration method is analyzed for reconfigurable digital filters in case of sinusoidal excitation. First, the energy function of the reconfiguration transient is formulated, and later analyzed. The implementation structure is identified as key factor influencing the energy of the reconfiguration transients. Orthogonal implementation structures are proposed as the most suitable alternatives.