A symbolic z-transfer function generator for the synthesis and analysis of multirate switched-capacitor circuits

Presents an efficient symbolic analyzer which is capable of determining, and manipulating, the discrete-time signal flow graph (SFG) representing the operation of multirate switched-capacitor (SC) circuits and, then, extracting the corresponding symbolic z-transfer functions. The time-efficiency of the program is achieved by associating SC building blocks to single branch SFGs whose transmission factors represent the equivalent z-transfer functions. Circuit schematic edition is carried out through a dedicated, reliable user-friendly graphical interface in which connectivity errors can be easily detected and promptly corrected. A simple example is described to illustrate the operation of the symbol z-transfer function generator, including its graphical interface