A systematic analysis procedure to obtain closed-form expressions for the z-domain transfer functions of SC circuits with finite GB product op-amps is presented. This method allows exact frequential analysis of a general class of SC circuits, without imposing any restriction in the ratio between GB and clock frequencies.
Sanz, M.; Puerta, A. Compact formulation for exact analysis of nonideal SC circuits. "Electronics Letters", Maig 1987, vol. 23, núm. 11, p. 554-555.