Comunicación presentada al "XIV Design of Circuits and Integrated Systems Conference" celebrado en Palma de Mallorca (Spain) en Noviembre de 1999.This paper presents a detailed study on the transient response of SC integrators taking into account the effects of amplifier finite gain-bandwidth product and slew-rate during, unlike previous models, both the integration and sampling phases. Results are applied to the design of high-speed low-power ΣΔ modulators and simplified equations are obtained for manual-estimation of the settling error power.This work has been partially supported by the ESPRIT Project 29261 and the CICYT Project TIC 97-0580.Peer reviewed