A SIMULINK-based approach for fast and precise simulation of switched-capacitor, switched-current and continuous-time Sigma-Delta modulators. - J. Moreno-Reina; José M. de la Rosa 001; Fernando Medeiro; R. Romay; Rocío del Río; Maria Belen Pérez-Verdú; Ángel Rodríguez-Vázquez (ISCAS (4), 2003)