A comparison study of SC biquads in the realisation of SC filters

A systematic comparison for the realisation of SC filters using most popular SC biquads is given in this paper based on filter system realisation. Although the software has the facility to design a SC system with combined biquads, the authors restrict comparison to systems only composed of one kind of SC biquad, in order to simplify the question and make the guidelines of selecting SC biquads more practical for the SC filter designer who does not have SC compiler or has compiler but only with limited biquad structures. Comparison for SC filter realisation on total capacitance, capacitance spread, sensitivity, nonidealities and dynamic range is given. Some conclusions are obtained as very useful guidelines for the choice of a suitable biquad structure according to the nature of the filter problem