Functional-level simulation of switched-capacitor circuits with nonideal switches and operational amplifiers

The authors present a functional-level simulator primarily aimed at solving switched-capacitor networks. The simulator takes into consideration the ON resistance of the switches as well as the op-amp settling behavior as affected by different loading conditions at both the small-signal and large-signal domains. Typical simulation examples of switched-capacitor circuits have yielded results compatible with those of SPICE, but are obtained at a speed more than one order of magnitude faster than SPICE. In applications where the majority of the circuitry contains little or no instantaneous feedback loops, up to 1000×speed improvement over SPICE is achievable