Switched-capacitor filter networks derived from general parameter bandpass LC ladder networks

Extensions to two previously published switched-capacitor (SC) bandpass filter synthesis techniques are presented. These techniques are the impedance scaling method of R.B. Datar and A.S. Sedra (IEEE Trans. Circuits Syst., vol.CAS-30, p.888-898, Dec. 1983) and the mode simulation method for bandpass filter design of K. Martin and A.S. Sedra (IEEE Trans. Circuits Syst., vol.CAS-27, June 1980). The main focus of the present study is on the SC circuit simulation of a set of circuit describing equations derived from arbitrary general parameter bandpass LC ladder networks. An eight-order design example has been used to illustrate the extension to the two design methods. Although this example requires more op amps than the filter order, both designs have been shown to possess low sensitivity to component variations and a relatively low total capacitance.<>