Antonio Jesús Torralba Silgado Francisco Colodro Ruiz Multirate-cascade sigma-delta (MC-SD) modulators. 384-387 2001 conf/iscas/2001 ISCAS (1) http://doi.ieeecomputersociety.org/10.1109/ISCAS.2001.921873 db/conf/iscas/iscas2001-1.html#SilgadoR01