Direct by-inspection derivation of signal-flow graphs for multiphase stray-insensitive switched-capacitor filters

A direct by-inspection method for the derivation of signal-flow graphs (SFGs) for multiphase stray-insensitive switched-capacitor (SC) networks is presented. Compared to this method, others are relatively complicated and not direct in the sense that they require intermediate steps. The multiphase analysis presented in the paper is a generalisation of the method shown previously (see A. Dabrowski, 1987), where a by-inspection signal-flow graph analysis of biphase SC networks is described. Whereas only a brief summary of the derivation rules and an example are given here, the underlying theory will be published elsewhere.