Nodal analysis of switched-current filters

An efficient and relatively simple approach to the systematic analysis of ideal, or near-ideal, switched-current filters is described. The technique is based on the nodal analysis of a linear resistive network that models the behavior of the filter for small signals, allowing the use of any practical topology and the inclusion of important imperfections, as output resistances of MOS transistors, series resistances of current-conducting switches, and parasitic capacitances. Techniques for frequency-domain analysis, z-transform calculations, time-domain analysis, and frequency-domain sensitivity analysis are discussed. The method is not restricted to the analysis of the particular structures of switched-current filters. It can be easily generalized for the analysis of a wide class of periodically switched RC-active circuits, where it is assumed that the circuits stabilize between the switching instants