Nodal Analysis o f Switched - Capacitor 93 Networks

93 Networks Absstract-Switched-capacitor (SC) networks comprise capacitors interconnected by an array of perlodlcally operated switches. Such networks are particularly attractive in light of the high circuit density possible with MOS integrated circuit technology and hybrid integrated circuits using thin-film and silicon technology. The paper describes the analysis of SC networks by using nodal charge equations. It is showu that SC networks are time-variant sampled-data networks, which cau be viewed as taudeh connected four-ports in the r-domain. One pair of ports is viewed as a signal path corresponding to the even time slots, the other pair of ports as a path corresponding to the odd time slots of the periodically operated switches. In a subsequent publication the authors will show how four-port equivalent clrcults in the z-domain of six basic building blocks can be used for the description of any SC network. This method allows the direct use of traditional network analysis tools lie the transmissiou matrix for de,riving transfer functions. The method ultimately leads to a two-port analysis of SC networks in which conventional two-port theory can be applied.